WO2001081555A2 - Human kinases - Google Patents
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- WO2001081555A2 WO2001081555A2 PCT/US2001/012992 US0112992W WO0181555A2 WO 2001081555 A2 WO2001081555 A2 WO 2001081555A2 US 0112992 W US0112992 W US 0112992W WO 0181555 A2 WO0181555 A2 WO 0181555A2
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/10—Transferases (2.)
- C12N9/12—Transferases (2.) transferring phosphorus containing groups, e.g. kinases (2.7)
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K2217/00—Genetically modified animals
- A01K2217/05—Animals comprising random inserted nucleic acids (transgenic)
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Definitions
- This invention relates to nucleic acid and amino acid sequences of human kinases and to the use of these sequences in the diagnosis, treatment, and prevention of cancer, immune disorders, disorders affecting growth and development, cardiovascular diseases, and lipid disorders, and in the assessment of the effects of exogenous compounds on the expression of nucleic acid and amino acid sequences of human kinases.
- Kinases comprise the largest known enzyme superfamily and vary widely in their target molecules. Kinases catalyze the transfer of high energy phosphate groups from a phosphate donor to a phosphate acceptor. Nucleotides usually serve as the phosphate donor in these reactions, with most kinases utilizing adenosine triphosphate (ATP).
- the phosphate acceptor can be any of a variety of molecules, including nucleosides, nucleotides, lipids, carbohydrates, and proteins. Proteins are phosphorylated on hydroxy amino acids. Addition of a phosphate group alters the local charge on the acceptor molecule, causing internal conformational changes and potentially influencing intermolecular contacts.
- Reversible protein phosphorylation is the primary method for regulating protein activity in eukaryotic cells.
- proteins are activated by phosphorylation in response to extracellular signals such as hormones, neurotransmitters, and growth and differentiation factors.
- the activated proteins initiate the cell's intracellular response by way of intracellular signaling pathways and second messenger molecules such as cyclic nucleotides, calcium-calmodulin, inositol, and various mitogens, that regulate protein phosphorylation.
- kinases are involved in all aspects of a cell's function, from basic metabolic processes, such as glycolysis, to cell-cycle regulation, differentiation, and communication with the extracellular environment through signal transduction cascades. Inappropriate phosphorylation of proteins in cells has been linked to changes in cell cycle progression and cell differentiation. Changes in the cell cycle have been linked to induction of apoptosis or cancer. Changes in cell differentiation have been linked to diseases and disorders of the reproductive system, immune system, and skeletal muscle. There are two classes of protein kinases.
- PTKs protein tyrosine kinases
- STKs protein serine/threonine kinases
- C- terminal subdomains NI-XI bind the protein substrate and transfer the gamma phosphate from ATP to the hydroxyl group of a tyrosine, serine, or threonine residue.
- Each of the 11 subdomains contains specific catalytic residues or amino acid motifs characteristic of that subdomain.
- subdomain I contains an 8-amino acid glycine-rich ATP binding consensus motif
- subdomain II contains a critical lysine residue required for maximal catalytic activity
- subdomains NI through LX comprise the highly conserved catalytic core.
- PTKs and STKs also contain distinct sequence motifs in subdomains NI and NO which may confer hydroxy amino acid specificity.
- kinases may also be classified by additional amino acid sequences, generally between 5 and 100 residues, which either flank or occur within the kinase domain. These additional amino acid sequences regulate kinase activity and determine substrate specificity.
- Protein tyrosine kinases may be classified as either transmembrane, receptor PTKs or nontransmembrane, nonreceptor PTK proteins.
- Transmembrane tyrosine kinases function as receptors for most growth factors. Growth factors bind to the receptor tyrosine kinase (RTK), which causes the receptor to phosphorylate itself (autophosphorylation) and specific intracellular second messenger proteins. Growth factors (GF) that associate with receptor PTKs include epidermal GF, platelet-derived GF, fibroblast GF, hepatocyte GF, insulin and insulin-like GFs, nerve GF, vascular endothelial GF, and macrophage colony stimulating factor.
- RTK receptor tyrosine kinase
- Nontransmembrane, nonreceptor PTKs lack transmembrane regions and, instead, form signaling complexes with the cytosolic domains of plasma membrane receptors.
- Receptors that function through non-receptor PTKs include those for cytokines and hormones (growth hormone and prolactin), and antigen-specific receptors on T and B lymphocytes.
- PTKs were first identified as oncogene products in cancer cells in which PTK activation was no longer subject to normal cellular controls. In fact, about one third of the known oncogenes encode PTKs. Furthermore, cellular transformation (oncogenesis) is often accompanied by increased tyrosine phosphorylation activity (Charbonneau, H. and N.K. Tonks (1992) Annu. Rev. Cell Biol. 8:463-493). Regulation of PTK activity may therefore be an important strategy in controlling some types of cancer. Protein Serine/Threonine Kinases
- STKs Protein serine/threonine kinases
- a subclass of STKs are known as ERKs (extracellular signal regulated kinases) or MAPs (mitogen-activated protein kinases) and are activated after cell stimulation by a variety of hormones and growth factors.
- Cell stimulation induces a signaling cascade leading to phosphorylation of MEK (MAP/ERK kinase) which, in turn, activates ERK via serine and threonine phosphorylation.
- MEK MAP/ERK kinase
- a varied number of proteins represent the downstream effectors for the active ERK and implicate it in the control of cell proliferation and differentiation, as well as regulation of the cytoskeleton.
- ERK Activation of ERK is normally transient, and cells possess dual specificity phosphatases that are responsible for its down- regulation. Also, numerous studies have shown that elevated ERK activity is associated with some cancers.
- Other STKs include the second messenger dependent protein kinases such as the cyclic-AMP dependent protein kinases (PKA), calcium-calmodulin (CaM) dependent protein kinases, and the mitogen-activated protein kinases (MAP); the cyclin-dependent protein kinases; checkpoint and cell cycle kinases; Numb-associated kinase (Nak); human Fused (hFu); proliferation-related kinases; 5 -AMP-activated protein kinases; and kinases involved in apoptosis.
- PKA cyclic-AMP dependent protein kinases
- CaM calcium-calmodulin dependent protein kinases
- MAP mitogen-activated protein kinases
- the cyclin-dependent protein kinases
- the second messenger dependent protein kinases primarily mediate the effects of second messengers such as cyclic AMP (cAMP), cyclic GMP, inositol triphosphate, phosphatidylinositol, 3,4,5-triphosphate, cyclic ADP ribose, arachidonic acid, diacylglycerol and calcium-calmodulin.
- cAMP cyclic AMP
- GMP cyclic GMP
- inositol triphosphate phosphatidylinositol
- 3,4,5-triphosphate cyclic ADP ribose
- arachidonic acid diacylglycerol
- calcium-calmodulin calcium-calmodulin.
- PKAs cyclic AMP
- the PKAs are involved in mediating hormone-induced cellular responses and are activated by cAMP produced within the cell in response to hormone stimulation.
- cAMP is an intracellular mediator of hormone action in all animal cells that have been studied.
- Hormone-induced cellular responses include thyroid hormone secretion, cortisol secretion, progesterone secretion, glycogen breakdown, bone resorption, and regulation of heart rate and force of heart muscle contraction.
- PKA is found in all animal cells and is thought to account for the effects of cAMP in most of these cells. Altered PKA expression is implicated in a variety of disorders and diseases including cancer, thyroid disorders, diabetes, atherosclerosis, and cardiovascular disease (Isselbacher, K . et al. (1994) Harrison's Principles of Internal Medicine. McGraw-Hill, New York NY, pp. 416-431, 1887).
- CKI casein kinase I
- CKI casein kinase I
- CKI enzymes are present in the membranes, nucleus, cytoplasm and cytoskeleton of eukaryotic cells, and on the mitotic spindles of mammalian cells (Fish, K . et al. (1995) J. Biol. Chem. 270:14875-14883).
- the CKI family members all have a short amino-terminal domain of 9-76 amino acids, a highly conserved kinase domain of 284 amino acids, and a variable carboxyl-terminal domain that ranges from 24 to over 200 amino acids in length (Cegielska, A. et al. (1998) J. Biol. Chem. 273:1357-1364).
- the CKI family is comprised of highly related proteins, as seen by the identification of isoforms of casein kinase I from a variety of sources. There are at least five mammalian isoforms, ⁇ , ⁇ , ⁇ , ⁇ , and ⁇ . Fish et al., identified CKI-epsilon from a human placenta cDNA library.
- CKI- epsilon plays a major role in delaying the negative feedback signal within the transcription- translation-based autoregulatory loop that composes the core of the circadian mechanism. Therefore the CKI-epsilon enzyme is an ideal target for pharmaceutical compounds influencing circadian rhythms, jet-lag and sleep, in addition to other physiologic and metabolic processes under circadian regulation (Lowrey, P.L. et al. (2000) Science 288:483-491).
- HIPKs Homeodomain-interacting protein kinases
- HIPKs are serine/threonine kinases and novel members of the DYRK kinase subfamily (Hofmann, T.G. et al., (2000) Biochimie 82:1123-7).
- HIPKs contain a conserved protein kinase domain separated from a domain that interacts with homeoproteins.
- HIPKs are nuclear kinases, and HIPK2 is highly expressed in neuronal tissue (Kim, Y.H. et al., (1998) J. Biol. Chem. 273:25875-9; Wang, Y. et al., (2001) Biochim. Biophys. Acta 1518:168-172).
- HIPKs act as corepressors for homeodomian transcription factors. This corepressor activity is seen in posttranslational modifications such as ubiquitination and phosphorylation, each are important in the regulation of cellular protein function (Kim, Y.H. et al., (1999) Proc. Nat. Acad. Sci. U.S A. 96:12350-5).
- CaM kinases are involved in regulation of smooth muscle contraction, glycogen breakdown (phosphorylase kinase), and neurotransmission (CaM kinase I and CaM kinase II). CaM dependent protein kinases are activated by calmodulin, an intracellular calcium receptor, in response to the concentration of free calcium in the cell. Many CaM kinases are also activated by phosphorylation. Some CaM kinases are also activated by autophosphorylation or by other regulatory kinases.
- CaM kinase I phosphorylates a variety of substrates including the neurotransmitter-related proteins synapsin I and ⁇ , the gene transcription regulator, CREB, and the cystic fibrosis conductance regulator protein, CFTR (Haribabu, B. et al. (1995) EMBO J. 14:3679- 3686).
- CaM kinase II also phosphorylates synapsin at different sites and controls the synthesis of catecholamines in the brain through phosphorylation and activation of tyrosine hydroxylase.
- CaM kinase II controls the synthesis of catecholamines and seratonin, through phosphorylation/activation of tyrosine hydroxylase and tryptophan hydroxylase, respectively (Fujisawa, H. (1990) BioEssays 12:27-29).
- the mRNA encoding a calmodulin-binding protein kinase-like protein was found to be enriched in mammalian forebrain. This protein is associated with vesicles in both axons and dendrites and accumulates largely postnatally.
- the amino acid sequence of this protein is similar to CaM-dependent STKs, and the protein binds calmodulin in the presence of calcium (Godbout, M. et al.
- MAP mitogen-activated protein kinases
- STK mitogen-activated protein kinases
- the extracellular stimuli which activate MAP kinase pathways include epidermal growth factor (EGF), ultraviolet light, hyperosmolar medium, heat shock, endotoxic lipopolysaccharide (LPS), and pro-inflammatory cytokines such as tumor necrosis factor (TNF) and interleukin-1 (IL-1).
- EGF epidermal growth factor
- LPS endotoxic lipopolysaccharide
- cytokines such as tumor necrosis factor (TNF) and interleukin-1 (IL-1).
- TNF tumor necrosis factor
- IL-1 interleukin-1
- CDKs The cyclin-dependent protein kinases
- the entry and exit of a cell from mitosis are regulated by the synthesis and destruction of a family of activating proteins called cyclins.
- Cyclins are small regulatory proteins that bind to and activate CDKs, which then phosphorylate and activate selected proteins involved in the mitotic process.
- CDKs are unique in that they require multiple inputs to become activated. In addition to cyclin binding, CDK activation requires the phosphorylation of a specific threonine residue and the dephosphorylation of a specific tyrosine residue on the CDK.
- cell cycle checkpoints In the process of cell division, the order and timing of cell cycle transitions are under control of cell cycle checkpoints, which ensure that critical events such as DNA replication and chromosome segregation are carried out with precision. If DNA is damaged, e.g. by radiation, a checkpoint pathway is activated that arrests the cell cycle to provide time for repair. If the damage is extensive, apoptosis is induced. In the absence of such checkpoints, the damaged DNA is inherited by aberrant cells which may cause proliferative disorders such as cancer. Protein kinases play an important role in this process. For example, a specific kinase, checkpoint kinase 1 (Chkl), has been identified in yeast and mammals, and is activated by DNA damage in yeast.
- Chkl checkpoint kinase 1
- Chkl Activation of Chkl leads to the arrest of the cell at the G2/M transition (Sanchez, Y. et al. (1997) Science 277:1497-1501). Specifically, Chkl phosphorylates the cell division cycle phosphatase CDC25, inhibiting its normal function which is to dephosphorylate and activate the cyclin-dependent kinase Cdc2. Cdc2 activation controls the entry of cells into mitosis (Peng, C.-Y. et al. (1997) Science 277:1501-1505). Thus, activation of Chkl prevents the damaged cell from entering mitosis. A similar deficiency in a checkpoint kinase, such as Chkl, may also contribute to cancer by failure to arrest cells with damaged DNA at other checkpoints such as G2/M. Proliferation-Related Kinases
- Proliferation-related kinase is a serum/cytokine inducible STK that is involved in regulation of the cell cycle and cell proliferation in human megakarocytic cells (Li, B. et al. (1996) J. Biol.
- Proliferation-related kinase is related to the polo (derived from Drosophila polo gene) family of STKs implicated in cell division. Proliferation-related kinase is downregulated in lung tumor tissue and may be a proto-oncogene whose deregulated expression in normal tissue leads to oncogenic transformation. 5 -AMP-activated protein kinase
- a ligand-activated STK protein kinase is 5 -AMP-activated protein kinase (AMPK) (Gao, G. et al. (1996) J. Biol Chem. 271:8675-8681).
- AMPK 5 -AMP-activated protein kinase
- Mammalian AMPK is a regulator of fatty acid and sterol synthesis through phosphorylation of the enzymes acetyl-CoA carboxylase and hydroxymethylglutaryl-CoA reductase and mediates responses of these pathways to cellular stresses such as heat shock and depletion of glucose and ATP.
- AMPK is a heterotrimeric complex comprised of a catalytic alpha subunit and two non-catalytic beta and gamma subunits that are believed to regulate the activity of the alpha subunit.
- Subunits of AMPK have a much wider distribution in non-lipogenic tissues such as brain, heart, spleen, and lung than expected. This distribution suggests that its role may extend beyond regulation of lipid metabolism alone.
- Kinases in Apoptosis Apoptosis is a highly regulated signaling pathway leading to cell death that plays a crucial role in tissue development and homeostasis. Deregulation of this process is associated with the pathogenesis of a number of diseases including autoimmune disease, neurodegenerative disorders, and cancer.
- Various STKs play key roles in this process.
- ZIP kinase is an STK containing a C-terminal leucine zipper domain in addition to its N-terminal protein kinase domain. This C-terminal domain appears to mediate homodimerization and activation of the kinase as well as interactions with transcription factors such as activating transcription factor, ATF4, a member of the cyclic-AMP responsive element binding protein (ATF/CREB) family of transcriptional factors (Sanjo, H. et al. (1998) J. Biol. Chem. 273:29066-29071).
- ATF4 activating transcription factor
- ATF/CREB cyclic-AMP responsive element binding protein
- DRAK1 and DRAK2 are STKs that share homology with the death-associated protein kinases (DAP kinases), known to function in interferon- ⁇ induced apoptosis (Sanjo et al., supra).
- DAP kinases death-associated protein kinases
- ZIP kinases contain a C-terminal protein-protein interaction domain, in the form of ankyrin repeats, in addition to the N-terminal kinase domain.
- ZIP, DAP, and DRAK kinases induce morphological changes associated with apoptosis when transfected into NIH3T3 cells (Sanjo et al., supra).
- RICK is another STK recently identified as mediating a specific apoptotic pathway involving the death receptor, CD95 ( ⁇ nohara, N. et al. (1998) J. Biol. Chem. 273:12296-12300).
- CD95 is a member of the tumor necrosis factor receptor superfamily and plays a critical role in the regulation and homeostasis of the immune system (Nagata, S. (1997) Cell 88:355-365).
- the CD95 receptor signaling pathway involves recruitment of various intracellular molecules to a receptor complex following ligand binding. This process includes recruitment of the cysteine protease caspase-8 which, in turn, activates a caspase cascade leading to cell death.
- RICK is composed of an N-terminal kinase catalytic domain and a C-terminal "caspase-recruitment" domain that interacts with caspase-like domains, indicating that RICK plays a role in the recruitment of caspase-8. This interpretation is supported by the fact that the expression of RICK in human 293T cells promotes activation of caspase-8 and potentiates the induction of apoptosis by various proteins involved in the CD95 apoptosis pathway (Inohara et al., supra). Mitochondrial Protein Kinases
- a novel class of eukaryotic kinases related by sequence to prokaryotic histidine protein kinases, are the mitochondrial protein kinases (MPKs) which seem to have no sequence similarity with other eukaryotic protein kinases. These protein kinases are located exclusively in the mitochondrial matrix space and may have evolved from genes originally present in respiration- dependent bacteria which were endocytosed by primitive eukaryotic cells. MPKs are responsible for phosphorylation and inactivation of the branched-chain alpha-ketoacid dehydrogenase and pyruvate dehydrogenase complexes (Harris, R.A. et al. (1995) Adv. Enzyme Regul. 34:147-162).
- MPKs Five MPKs have been identified. Four members correspond to pyruvate dehydrogenase kinase isozymes, regulating the activity of the pyruvate dehydrogenase complex, which is an important regulatory enzyme at the interface between glycolysis and the citric acid cycle.
- the fifth member corresponds to a branched-chain alpha-ketoacid dehydrogenase kinase, important in the regulation of the pathway for the disposal of branched-chain amino acids. (Harris, R.A. et al. (1997) Adv. Enzyme Regul. 37:271- 293).
- Lipid kinases phosphorylate hydroxyl residues on lipid head groups.
- a family of kinases involved in phosphorylation of phosphatidylinositol (PI) has been described, each member phosphorylating a specific carbon on the inositol ring (Leevers, S.J. et al. (1999) Curr. Opin. Cell. Biol. 11:219-225).
- the phosphorylation of phosphatidylinositol is involved in activation of the protein kinase C signaling pathway.
- the inositol phospholipids (phosphoinositides) intracellular signaling pathway begins with binding of a signaling molecule to a G-protein linked receptor in the plasma membrane.
- PI phosphatidylinositol
- PI 3-kinase which phosphorylates the D3 position of PI and its derivatives, has a central role in growth factor signal cascades involved in cell growth, differentiation, and metabolism.
- PI3K is a heterodimer consisting of an adapter subunit and a catalytic subunit.
- the adapter subunit acts as a scaffolding protein, interacting with specific tyrosine-phosphorylated proteins, lipid moieties, and other cytosolic factors.
- the catalytic subunit When the adapter subunit binds tyrosine phosphorylated targets, such as the insulin responsive substrate (IRS)-l, the catalytic subunit is activated and converts PI (4,5) bisphosphate (PIP 2 ) to PI (3,4,5) P 3 (P-P 3 ). PIP 3 then activates a number of other proteins, including PKA, protein kinase B (PKB), protein kinase C (PKC), glycogen synthase kinase (GSK)-3, and p70 ribosomal s6 kinase. PI3K also interacts directly with the cytoskeletal organizing proteins, Rac, rho, and cdc42 (Shepherd, P.R.
- SPP lipid kinase phosphorylation activity
- SPP D-erythro-sphingosine to the sphingolipid metabolite, sphingosine-1- ⁇ hosphate
- SPP levels are regulated by sphingosine kinases that specifically phosphorylate D-erythro-sphingosine to SPP.
- the importance of sphingosine kinase in cell signaling is indicated by the fact that various stimuli, including platelet-derived growth factor (PDGF), nerve growth factor, and activation of protein kinase C, increase cellular levels of SPP by activation of sphingosine kinase, and the fact that competitive inhibitors of the enzyme selectively inhibit cell proliferation induced by PDGF (Kohama et al., supra).
- PDGF platelet-derived growth factor
- nerve growth factor nerve growth factor
- protein kinase C protein kinase C
- the purine nucleotide kinases adenylate kinase (ATP:AMP phosphotransferase, or AdK) and guanylate kinase (ATP:GMP phosphotransferase, or GuK) play a key role in nucleotide metabolism and are crucial to the synthesis and regulation of cellular levels of ATP and GTP, respectively.
- ATP AMP phosphotransferase
- GuK guanylate kinase
- AdK AdK is found in almost all cell types and is especially abundant in cells having high rates of ATP synthesis and utilization such as skeletal muscle. In these cells AdK is physically associated with mitochondria and myofibrils, the subcellular structures that are involved in energy production and utilization, respectively. Recent studies have demonstrated a major function for AdK in transferring high energy phosphoryls from metabolic processes generating ATP to cellular components consuming ATP (Zeleznikar, RJ. et al. (1995) J. Biol. Chem. 270:7311-7319). Thus AdK may have a pivotal role in maintaining energy production in cells, particularly those having a high rate of growth or metabolism such as cancer cells, and may provide a target for suppression of its activity to treat certain cancers. Alternatively, reduced AdK activity may be a source of various metabolic, muscle-energy disorders that can result in cardiac or respiratory failure and may be treatable by increasing AdK activity.
- G ⁇ K in addition to providing a key step in the synthesis of GTP for RNA and DNA synthesis, also fulfills an essential function in signal transduction pathways of cells through the regulation of GDP and GTP. Specifically, GTP binding to membrane associated G proteins mediates the activation of cell receptors, subsequent intracellular activation of adenyl cyclase, and production of the second messenger, cyclic AMP. GDP binding to G proteins inhibits these processes. GDP and GTP levels also control the activity of certain oncogenic proteins such as p21 ras known to be involved in control of cell proliferation and oncogenesis (Bos, J.L. (1989) Cancer Res. 49:4682-4689). High ratios of GTP:GDP caused by suppression of GuK cause activation of p21 ras and promote oncogenesis. Increasing GuK activity to increase levels of GDP and reduce the GTP:GDP ratio may provide a therapeutic strategy to reverse oncogenesis.
- GuK is an important enzyme in the phosphorylation and activation of certain antiviral drugs useful in the treatment of herpes virus infections. These drugs include the guanine homologs acyclovir and buciclovir (Miller, W.H. and R.L. Miller (1980) J. Biol. Chem. 255:7204-7207; Stenberg, K. et al. (1986) J. Biol. Chem. 261:2134-2139). Increasing GuK activity in infected cells may provide a therapeutic strategy for augmenting the effectiveness of these drugs and possibly for reducing the necessary dosages of the drugs. Pyrimidine Kinases
- the pyrimidine kinases are deoxycytidine kinase and thymidine kinase 1 and 2.
- Deoxycytidine kinase is located in the nucleus, and thymidine kinase 1 and 2 are found in the cytosol (Johansson, M. et al. (1997) Proc. Natl. Acad. Sci. USA 94:11941-11945).
- Phosphorylation of deoxyribonucleosides by pyrimidine kinases provides an alternative pathway for de novo synthesis of DNA precursors.
- pyrimidine kinases like purine kinases, in phosphorylation is critical to the activation of several chemotherapeutically important nucleoside analogues (Arner E.S. and S. Eriksson (1995) Pharmacol. Ther. 67:155-186).
- the invention features purified polypeptides, human kinases, referred to collectively as “PKIN” and individually as “PKIN-1,” “PKIN-2,” “PKJN-3,” “PKTN-4,” “PKIN-5,” “PKIN-6,” “PKTN-7,” “PKIN-8,” “PKIN-9,” “PKIN-10,” “PKIN-11,” “PKIN-12,” “PKIN-13,” “PKIN-14,” “PKJ-N-15,” “PK ⁇ J -16,” “PKIN- ⁇ ,” and “PKIN-18.”
- the invention provides an isolated polypeptide selected from the group consisting of a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO:l-18, b) a naturally occurring polypeptide comprising an amino acid sequence at least 90% identical to an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, c) a biologically active fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, and d) an immuno
- the invention provides an isolated polypeptide comprising the amino acid sequence of SEQ ID NO:l-18.
- the invention further provides an isolated polynucleotide encoding a polypeptide selected from the group consisting of a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, b) a naturally occurring polypeptide comprising an amino acid sequence at least 90% identical to an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, c) a biologically active fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, and d) an immunogenic fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18.
- the polynucleotide encodes a polypeptide selected from the group consisting of SEQ ID NO: 1-18.
- the polynucleotide is selected from the group consisting of SEQ ID NO: 19-36.
- the invention provides a recombinant polynucleotide comprising a promoter sequence operably linked to a polynucleotide encoding a polypeptide selected from the group consisting of a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, b) a naturally occurring polypeptide comprising an amino acid sequence at least 90% identical to an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, c) a biologically active fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, and d) an immunogenic fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18.
- the invention provides a cell transformed with the recombinant polynucleotide.
- the invention provides a transgenic organism comprising the recombinant polynucleotide.
- the invention also provides a method for producing a polypeptide selected from the group consisting of a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ JD NO: 1-18, b) a naturally occurring polypeptide comprising an amino acid sequence at least 90% identical to an amino acid sequence selected from the group consisting of SEQ JD NO: 1-18, c) a biologically active fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ 3D NO: 1-18, and d) an immunogenic fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ JD NO: 1-18.
- the method comprises a) culturing a cell under conditions suitable for expression of the polypeptide, wherein said cell is transformed with a recombinant polynucleotide comprising a promoter sequence operably linked to a polynucleotide encoding the polypeptide, and b) recovering the polypeptide so expressed.
- the invention provides an isolated antibody which specifically binds to a polypeptide selected from the group consisting of a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ JD NO:l-18, b) a naturally occurring polypeptide comprising an amino acid sequence at least 90% identical to an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, c) a biologically active fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, and d) an immunogenic fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ JD NO:l-18.
- the invention further provides an isolated polynucleotide selected from the group consisting of a) a polynucleotide comprising a polynucleotide sequence selected from the group consisting of SEQ ID NO: 19-36, b) a naturally occurring polynucleotide comprising a polynucleotide sequence at least 90% identical to a polynucleotide sequence selected from the group consisting of SEQ ID NO: 19-36, c) a polynucleotide complementary to the polynucleotide of a), d) a polynucleotide complementary to the polynucleotide of b), and e) an RNA equivalent of a)-d).
- the polynucleotide comprises at least 60 contiguous nucleotides. Additionally, the invention provides a method for detecting a target polynucleotide in a sample, said target polynucleotide having a sequence of a polynucleotide selected from the group consisting of a) a polynucleotide comprising a polynucleotide sequence selected from the group consisting of SEQ ID NO: 19-36, b) a naturally occurring polynucleotide comprising a polynucleotide sequence at least 90% identical to a polynucleotide sequence selected from the group consisting of SEQ ID NO: 19-36, c) a polynucleotide complementary to the polynucleotide of a), d) a polynucleotide complementary to the polynucleotide of b), and e) an RNA equivalent of a)-d).
- the method comprises a) hybridizing the sample with a probe comprising at least 20 contiguous nucleotides comprising a sequence complementary to said target polynucleotide in the sample, and which probe specifically hybridizes to said target polynucleotide, under conditions whereby a hybridization complex is formed between said probe and said target polynucleotide or fragments thereof, and b) detecting the presence or absence of said hybridization complex, and optionally, if present, the amount thereof.
- the probe comprises at least 60 contiguous nucleotides.
- the invention further provides a method for detecting a target polynucleotide in a sample, said target polynucleotide having a sequence of a polynucleotide selected from the group consisting of a) a polynucleotide comprising a polynucleotide sequence selected from the group consisting of SEQ ID NO: 19-36, b) a naturally occurring polynucleotide comprising a polynucleotide sequence at least 90% identical to a polynucleotide sequence selected from the group consisting of SEQ JD NO: 19-36, c) a polynucleotide complementary to the polynucleotide of a), d) a polynucleotide complementary to the polynucleotide of b), and e) an RNA equivalent of a)-d).
- the method comprises a) amplifying said target polynucleotide or fragment thereof using polymerase chain reaction amplification, and b) detecting the presence or absence of said amplified target polynucleotide or fragment thereof, and, optionally, if present, the amount thereof.
- the invention further provides a composition comprising an effective amount of a polypeptide selected from the group consisting of a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO:l-18, b) a naturally occurring polypeptide comprising an amino acid sequence at least 90% identical to an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, c) a biologically active fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ JD NO:l-18, and d) an immunogenic fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, and a pharmaceutically acceptable excipient.
- the composition comprises an amino acid sequence selected from the group consisting of SEQ JD NO:l-18.
- the invention additionally provides a method of treating a disease or condition associated with decreased expression of functional PKIN, comprising administering to a patient in need of such treatment the composition.
- the invention also provides a method for screening a compound for effectiveness as an agonist of a polypeptide selected from the group consisting of a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO:l-18, b) a naturally occurring polypeptide comprising an amino acid sequence at least 90% identical to an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, c) a biologically active fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ JD NO:l-18, and d) an immunogenic fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO:l-18.
- the method comprises a) exposing a sample comprising the polypeptide to a compound, and b) detecting agonist activity in the sample.
- the invention provides a composition comprising an agonist compound identified by the method and a pharmaceutically acceptable excipient.
- the invention provides a method of treating a disease or condition associated with decreased expression of functional PKTN, comprising administering to a patient in need of such treatment the composition.
- the invention provides a method for screening a compound for effectiveness as an antagonist of a polypeptide selected from the group consisting of a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, b) a naturally occurring polypeptide comprising an amino acid sequence at least 90% identical to an amino acid sequence selected from the group consisting of SEQ ID NO:l-18, c) a biologically active fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, and d) an immunogenic fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO:l-18.
- the method comprises a) exposing a sample comprising the polypeptide to a compound, and b) detecting antagonist activity in the sample.
- the invention provides a composition comprising an antagonist compound identified by the method and a pharmaceutically acceptable excipient.
- the invention provides a method of treating a disease or condition associated with overexpression of functional PKIN, comprising administering to a patient in need of such treatment the composition.
- the invention further provides a method of screening for a compound that specifically binds to a polypeptide selected from the group consisting of a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, b) a naturally occurring polypeptide cmoprising an amino acid sequence at least 90% identical to an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, c) a biologically active fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO: 1-18, and d) an immunogenic fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO:l-18.
- the method comprises a) combining the polypeptide with at least one test compound under suitable conditions, and b) detecting binding of the polypeptide to the test compound, thereby identifying a compound that specifically binds to the polypeptide.
- the invention further provides a method of screening for a compound that modulates the activity of a polypeptide selected from the group consisting of a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ JD NO: 1-18, b) a naturally occurring polypeptide comprising an amino acid sequence at least 90% identical to an amino acid sequence selected from the group consisting of SEQ JD NO: 1-18, c) a biologically active fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ JD NO: 1-18, and d) an immunogenic fragment of a polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO-.1-18.
- the method comprises a) combining the polypeptide with at least one test compound under conditions permissive for the activity of the polypeptide, b) assessing the activity of the polypeptide in the presence of the test compound, and c) comparing the activity of the polypeptide in the presence of the test compound with the activity of the polypeptide in the absence of the test compound, wherein a change in the activity of the polypeptide in the presence of the test compound is indicative of a compound that modulates the activity of the polypeptide.
- the invention further provides a method for screening a compound for effectiveness in altering expression of a target polynucleotide, wherein said target polynucleotide comprises a sequence selected from the group consisting of SEQ ID NO:19-36, the method comprising a) exposing a sample comprising the target polynucleotide to a compound, and b) detecting altered expression of the target polynucleotide.
- the invention further provides a method for assessing toxicity of a test compound, said method comprising a) treating a biological sample containing nucleic acids with the test compound; b) hybridizing the nucleic acids of the treated biological sample with a probe comprising at least 20 contiguous nucleotides of a polynucleotide selected from the group consisting of i) a polynucleotide comprising a polynucleotide sequence selected from the group consisting of SEQ ID NO: 19-36, ii) a naturally occurring polynucleotide comprising a polynucleotide sequence at least 90% identical to a polynucleotide sequence selected from the group consisting of SEQ ID NO: 19-36, iii) a polynucleotide having a sequence complementary to i), iv) a polynucleotide complementary to the polynucleotide of ii), and v) an RNA equivalent of i)-iv
- Hybridization occurs under conditions whereby a specific hybridization complex is formed between said probe and a target polynucleotide in the biological sample, said target polynucleotide selected from the group consisting of i) a polynucleotide comprising a polynucleotide sequence selected from the group consisting of SEQ ID NO:19-36, ii) a naturally occurring polynucleotide comprising a polynucleotide sequence at least 90% identical to a polynucleotide sequence selected from the group consisting of SEQ ID NO: 19-36, iii) a polynucleotide complementary to the polynucleotide of i), iv) a polynucleotide complementary to the polynucleotide of ii), and v) an RNA equivalent of i)-iv).
- a target polynucleotide selected from the group consisting of i) a polynucleotide compris
- the target polynucleotide comprises a fragment of a polynucleotide sequence selected from the group consisting of i)-v) above; c) quantifying the amount of hybridization complex; and d) comparing the amount of hybridization complex in the treated biological sample with the amount of hybridization complex in an untreated biological sample, wherein a difference in the amount of hybridization complex in the treated biological sample is indicative of toxicity of the test compound.
- Table 2 shows the GenBank identification number and annotation of the nearest GenBank homolog for polypeptides of the invention. The probability score for the match between each polypeptide and its GenBank homolog is also shown.
- Table 3 shows structural features of polypeptide sequences of the invention, including predicted motifs and domains, along with the methods, algorithms, and searchable databases used for analysis of the polypeptides.
- Table 4 lists the cDNA and genomic DNA fragments which were used to assemble polynucleotide sequences of the invention, along with selected fragments of the polynucleotide sequences.
- Table 5 shows the representative cDNA library for polynucleotides of the invention.
- Table 6 provides an appendix which describes the tissues and vectors used for construction of the cDNA libraries shown in Table 5.
- Table 7 shows the tools, programs, and algorithms used to analyze the polynucleotides and polypeptides of the invention, along with applicable descriptions, references, and threshold parameters.
- a reference to “a host cell” includes a plurality of such host cells
- a reference to “an antibody” is a reference to one or more antibodies and equivalents thereof known to those skilled in the art, and so forth.
- all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this invention belongs.
- any machines, materials, and methods similar or equivalent to those described herein can be used to practice or test the present invention, the preferred machines, materials and methods are now described. All publications mentioned herein are cited for the purpose of describing and disclosing the cell lines, protocols, reagents and vectors which are reported in the publications and which might be used in connection with the invention. None herein is to be construed as an admission that the invention is not entitled to antedate such disclosure by virtue of prior invention. DEFINITIONS
- PKIN refers to the amino acid sequences of substantially purified PKIN obtained from any species, particularly a mammalian species, including bovine, ovine, porcine, murine, equine, and human, and from any source, whether natural, synthetic, semi-synthetic, or recombinant.
- agonist refers to a molecule which intensifies or mimics the biological activity of PKIN.
- Agonists may include proteins, nucleic acids, carbohydrates, small molecules, or any other compound or composition which modulates the activity of PKIN either by directly interacting with PKIN or by acting on components of the biological pathway in which PKIN participates.
- allelic variant is an alternative form of the gene encoding PKIN. Allelic variants may result from at least one mutation in the nucleic acid sequence and may result in altered mRNAs or in polypeptides whose structure or function may or may not be altered. A gene may have none, one, or many allelic variants of its naturally occurring form. Common mutational changes which give rise to allelic variants are generally ascribed to natural deletions, additions, or substitutions of nucleotides. Each of these types of changes may occur alone, or in combination with the others, one or more times in a given sequence.
- altered nucleic acid sequences encoding PKIN include those sequences with deletions, insertions, or substitutions of different nucleotides, resulting in a polypeptide the same as PKIN or a polypeptide with at least one functional characteristic of PKIN. Included within this definition are polymorphisms which may or may not be readily detectable using a particular oligonucleotide probe of the polynucleotide encoding PKIN, and improper or unexpected hybridization to allelic variants, with a locus other than the normal chromosomal locus for the polynucleotide sequence encoding PKJJST.
- the encoded protein may also be "altered,” and may contain deletions, insertions, or substitutions of amino acid residues which produce a silent change and result in a functionally equivalent PKIN.
- Deliberate amino acid substitutions may be made on the basis of similarity in polarity, charge, solubility, hydrophobicity, hydrophilicity, and/or the amphipathic nature of the residues, as long as the biological or immunological activity of PKIN is retained.
- negatively charged amino acids may include aspartic acid and glutamic acid
- positively charged amino acids may include lysine and arginine.
- Amino acids with uncharged polar side chains having similar hydrophilicity values may include: asparagine and glutamine; and serine and threonine.
- Amino acids with uncharged side chains having similar hydrophilicity values may include: leucine, isoleucine, and vaiine; glycine and alanine; and phenylalanine and tyrosine.
- amino acid and amino acid sequence refer to an oligopeptide, peptide, polypeptide, or protein sequence, or a fragment of any of these, and to naturally occurring or synthetic molecules. Where “amino acid sequence” is recited to refer to a sequence of a naturally occurring protein molecule, “amino acid sequence” and like terms are not meant to limit the amino acid sequence to the complete native amino acid sequence associated with the recited protein molecule. "Amplification” relates to the production of additional copies of a nucleic acid sequence. Amplification is generally carried out using polymerase chain reaction (PCR) technologies well known in the art.
- PCR polymerase chain reaction
- Antagonist refers to a molecule which inhibits or attenuates the biological activity of PKIN.
- Antagonists may include proteins such as antibodies, nucleic acids, carbohydrates, small molecules, or any other compound or composition which modulates the activity of PKIN either by directly interacting with PKIN or by acting on components of the biological pathway in which PKIN participates.
- antibody refers to intact immunoglobulin molecules as well as to fragments thereof, such as Fab, F(ab') 2 , and Fv fragments, which are capable of binding an epitopic determinant.
- Antibodies that bind PKIN polypeptides can be prepared using intact polypeptides or using fragments containing small peptides of interest as the immunizing antigen.
- the polypeptide or oligopeptide used to immunize an animal e.g., a mouse, a rat, or a rabbit
- an animal e.g., a mouse, a rat, or a rabbit
- RNA e.g., a mouse, a rat, or a rabbit
- antigenic determinant refers to that region of a molecule (i.e., an epitope) that makes contact with a particular antibody.
- an antigenic determinant may compete with the intact antigen (i.e., the immunogen used to elicit the immune response) for binding to an antibody.
- antisense refers to any composition capable of base-pairing with the "sense" (coding) strand of a specific nucleic acid sequence.
- Antisense compositions may include DNA; RNA; peptide nucleic acid (PNA); oligonucleotides having modified backbone linkages such as phosphorothioates, methylphosphonates, or benzylphosphonates; oligonucleotides having modified sugar groups such as 2'-methoxyethyl sugars or 2'-methoxyethoxy sugars; or oligonucleotides having modified bases such as 5-methyl cytosine, 2'-deoxyuracil, or 7-deaza-2'-deoxyguanosine.
- Antisense molecules may be produced by any method including chemical synthesis or transcription. Once introduced into a cell, the complementary antisense molecule base-pairs with a naturally occurring nucleic acid sequence produced by the cell to form duplexes which block either transcription or translation.
- the designation "negative” or “minus” can refer to the antisense strand, and the designation “positive” or “plus” can refer to the sense strand of a reference DNA molecule.
- biologically active refers to a protein having structural, regulatory, or biochemical functions of a naturally occurring molecule.
- immunologically active or “immunogenic” refers to the capability of the natural, recombinant, or synthetic PKIN, or of any oligopeptide thereof, to induce a specific immune response in appropriate animals or cells and to bind with specific antibodies.
- compositions comprising a given polynucleotide sequence and a “composition comprising a given amino acid sequence” refer broadly to any composition containing the given polynucleotide or amino acid sequence.
- the composition may comprise a dry formulation or an aqueous solution.
- Compositions comprising polynucleotide sequences encoding PKIN or fragments of PKJN may be employed as hybridization probes. The probes may be stored in freeze-dried form and may be associated with a stabilizing agent such as a carbohydrate.
- the probe may be deployed in an aqueous solution containing salts (e.g., NaCl), detergents (e.g., sodium dodecyl sulfate; SDS), and other components (e.g., Denhardt's solution, dry milk, salmon sperm DNA, etc.).
- salts e.g., NaCl
- detergents e.g., sodium dodecyl sulfate; SDS
- other components e.g., Denhardt's solution, dry milk, salmon sperm DNA, etc.
- Consensus sequence refers to a nucleic acid sequence which has been subjected to repeated DNA sequence analysis to resolve uncalled bases, extended using the XL-PCR kit (Applied Biosystems, Foster City CA) in the 5' and/or the 3' direction, and resequenced, or which has been assembled from one or more overlapping cDNA, EST, or genomic DNA fragments using a computer program for fragment assembly, such as the GELVIEW fragment assembly system (GCG, Madison WI) or Phrap (University of Washington, Seattle WA). Some sequences have been both extended and assembled to produce the consensus sequence.
- Constant amino acid substitutions are those substitutions that are predicted to least interfere with the properties of the original protein, i.e., the structure and especially the function of the protein is conserved and not significantly changed by such substitutions.
- the table below shows amino acids which may be substituted for an original amino acid in a protein and which are regarded as conservative amino acid substitutions.
- Conservative amino acid substitutions generally maintain (a) the structure of the polypeptide backbone in the area of the substitution, for example, as a beta sheet or alpha helical conformation, (b) the charge or hydrophobicity of the molecule at the site of the substitution, and/or (c) the bulk of the side chain.
- a “deletion” refers to a change in the amino acid or nucleotide sequence that results in the absence of one or more amino acid residues or nucleotides.
- derivative refers to a chemically modified polynucleotide or polypeptide. Chemical modifications of a polynucleotide can include, for example, replacement of hydrogen by an alkyl, acyl, hydroxyl, or amino group.
- a derivative polynucleotide encodes a polypeptide which retains at least one biological or immunological function of the natural molecule.
- a derivative polypeptide is one modified by glycosylation, pegylation, or any similar process that retains at least one biological or immunological function of the polypeptide from which it was derived.
- a “detectable label” refers to a reporter molecule or enzyme that is capable of generating a measurable signal and is covalently or noncovalently joined to a polynucleotide or polypeptide.
- “Differential expression” refers to increased or upregulated; or decreased, downregulated, or absent gene or protein expression, determined by comparing at least two different samples. Such comparisons may be carried out between, for example, a treated and an untreated sample, or a diseased and a normal sample.
- a "fragment” is a unique portion of PKI ⁇ or the polynucleotide encoding PKI ⁇ which is identical in sequence to but shorter in length than the parent sequence.
- a fragment may comprise up to the entire length of the defined sequence, minus one nucleotide/amino acid residue.
- a fragment may comprise from 5 to 1000 contiguous nucleotides or amino acid residues.
- a fragment used as a probe, primer, antigen, therapeutic molecule, or for other purposes may be at least 5, 10, 15, 16, 20, 25, 30, 40, 50, 60, 75, 100, 150, 250 or at least 500 contiguous nucleotides or amino acid residues in length. Fragments may be preferentially selected from certain regions of a molecule.
- a polypeptide fragment may comprise a certain length of contiguous amino acids selected from the first 250 or 500 amino acids (or first 25% or 50%) of a polypeptide as shown in a certain defined sequence.
- these lengths are exemplary, and any length that is supported by the specification, including the Sequence Listing, tables, and figures, may be encompassed by the present embodiments.
- a fragment of SEQ ID NO: 19-36 comprises a region of unique polynucleotide sequence that specifically identifies SEQ ID NO: 19-36, for example, as distinct from any other sequence in the genome from which the fragment was obtained.
- a fragment of SEQ ID NO:19-36 is useful, for example, in hybridization and amplification technologies and in analogous methods that distinguish SEQ ID NO: 19-36 from related polynucleotide sequences.
- the precise length of a fragment of SEQ ID NO:19-36 and the region of SEQ ID NO:19-36 to which the fragment corresponds are routinely determinable by one of ordinary skill in the art based on the intended purpose for the fragment.
- a fragment of SEQ ID NO: 1-18 is encoded by a fragment of SEQ ID NO.-19-36.
- a fragment of SEQ ID NO: 1-18 comprises a region of unique amino acid sequence that specifically identifies SEQ ID NO: 1-18.
- a fragment of SEQ ID NO: 1-18 is useful as an immunogenic peptide for the development of antibodies that specifically recognize SEQ ID NO: 1-18.
- the precise length of a fragment of SEQ ID NO: 1-18 and the region of SEQ ID NO:l-18 to which the fragment corresponds are routinely determinable by one of ordinary skill in the art based on the intended purpose for the fragment.
- a “full length” polynucleotide sequence is one containing at least a translation initiation codon (e.g., methionine) followed by an open reading frame and a translation termination codon.
- a “full length” polynucleotide sequence encodes a "full length” polypeptide sequence.
- “Homology” refers to sequence similarity or, interchangeably, sequence identity, between two or more polynucleotide sequences or two or more polypeptide sequences.
- the terms “percent identity” and “% identity,” as applied to polynucleotide sequences, refer to the percentage of residue matches between at least two polynucleotide sequences aligned using a standardized algorithm. Such an algorithm may insert, in a standardized and reproducible way, gaps in the sequences being compared in order to optimize alignment between two sequences, and therefore achieve a more meaningful comparison of the two sequences. Percent identity between polynucleotide sequences may be determined using the default parameters of the CLUSTAL V algorithm as incorporated into the MEG ALIGN version 3.12e sequence alignment program.
- NCBI National Center for Biotechnology Information
- BLAST Basic Local Alignment Search Tool
- NCBI National Center for Biotechnology Information
- BLAST Basic Local Alignment Search Tool
- the BLAST software suite includes various sequence analysis programs including "blastn,” that is used to align a known polynucleotide sequence with other polynucleotide sequences from a variety of databases.
- BLAST 2 Sequences are commonly used with gap and other parameters set to default settings. For example, to compare two nucleotide sequences, one may use blastn with the "BLAST 2 Sequences" tool Version 2.0.12 (April-21-2000) set at default parameters. Such default parameters may be, for example: Matrix: BLOSUM62 Reward for match: 1 Penalty for mismatch: -2 Open Gap: 5 and Extension Gap: 2 penalties
- Percent identity may be measured over the length of an entire defined sequence, for example, as defined by a particular SEQ ID number, or may be measured over a shorter length, for example, over the length of a fragment taken from a larger, defined sequence, for instance, a fragment of at least 20, at least 30, at least 40, at least 50, at least 70, at least 100, or at least 200 contiguous nucleotides.
- Such lengths are exemplary only, and it is understood that any fragment length supported by the sequences shown herein, in the tables, figures, or Sequence Listing, may be used to describe a length over which percentage identity may be measured.
- nucleic acid sequences that do not show a high degree of identity may nevertheless encode similar amino acid sequences due to the degeneracy of the genetic code. It is understood that changes in a nucleic acid sequence can be made using this degeneracy to produce multiple nucleic acid sequences that all encode substantially the same protein.
- percent identity and % identity refer to the percentage of residue matches between at least two polypeptide sequences aligned using a standardized algorithm.
- Methods of polypeptide sequence alignment are well-known. Some alignment methods take into account conservative amino acid substitutions. Such conservative substitutions, explained in more detail above, generally preserve the charge and rydrophobicity at the site of substitution, thus preserving the structure (and therefore function) of the polypeptide.
- NCBI BLAST software suite may be used.
- BLAST 2 Sequences Version 2.0.12 (April-21-2000) with blastp set at default parameters.
- Such default parameters may be, for example:
- Gap x drop-off 50
- Percent identity may be measured over the length of an entire defined polypeptide sequence, for example, as defined by a particular SEQ ID number, or may be measured over a shorter length, for example, over the length of a fragment taken from a larger, defined polypeptide sequence, for instance, a fragment of at least 15, at least 20, at least 30, at least 40, at least 50, at least 70 or at least 150 contiguous residues.
- Such lengths are exemplary only, and it is understood that any fragment length supported by the sequences shown herein, in the tables, figures or Sequence Listing, may be used to describe a length over which percentage identity may be measured.
- HACs Human artificial chromosomes
- HACs are linear microchromosomes which may contain DNA sequences of about 6 kb to 10 Mb in size and which contain all of the elements required for chromosome replication, segregation and maintenance.
- humanized antibody refers to an antibody molecule in which the amino acid sequence in the non-antigen binding regions has been altered so that the antibody more closely resembles a human antibody, and still retains its original binding ability.
- Hybridization refers to the process by which a polynucleotide strand anneals with a complementary strand through base pairing under defined hybridization conditions. Specific hybridization is an indication that two nucleic acid sequences share a high degree of complementarity. Specific hybridization complexes form under permissive annealing conditions and remain hybridized after the "washing" step(s). The washing step(s) is particularly important in determining the stringency of the hybridization process, with more stringent conditions allowing less non-specific binding, i.e., binding between pairs of nucleic acid strands that are not perfectly matched.
- Permissive conditions for annealing of nucleic acid sequences are routinely determinable by one of ordinary skill in the art and may be consistent among hybridization experiments, whereas wash conditions may be varied among experiments to achieve the desired stringency, and therefore hybridization specificity. Permissive annealing conditions occur, for example, at 68 °C in the presence of about 6 x SSC, about 1% (w/v) SDS, and about 100 ⁇ g/ml sheared, denatured salmon sperm DNA.
- wash temperatures are typically selected to be about 5°C to 20°C lower than the thermal melting point (T m ) for the specific sequence at a defined ionic strength and pH.
- T m is the temperature (under defined ionic strength and pH) at which 50% of the target sequence hybridizes to a perfectly matched probe.
- High stringency conditions for hybridization between polynucleotides of the present invention include wash conditions of 68°C in the presence of about 0.2 x SSC and about 0.1% SDS, for 1 hour. Alternatively, temperatures of about 65°C, 60°C, 55°C, or 42°C may be used. SSC concentration may be varied from about 0.1 to 2 x SSC, with SDS being present at about 0.1%.
- blocking reagents are used to block non-specific hybridization. Such blocking reagents include, for instance, sheared and denatured salmon sperm DNA at about 100-200 ⁇ g/ml.
- Organic solvent such as formamide at a concentration of about 35-50% v/v
- RNA:DNA hybridizations Useful variations on these wash conditions will be readily apparent to those of ordinary skill in the art.
- Hybridization particularly under high stringency conditions, may be suggestive of evolutionary similarity between the nucleotides. Such similarity is strongly indicative of a similar role for the nucleotides and their encoded polypeptides.
- hybridization complex refers to a complex formed between two nucleic acid sequences by virtue of the formation of hydrogen bonds between complementary bases.
- a hybridization complex may be formed in solution (e.g., C 0 t or R 0 t analysis) or formed between one nucleic acid sequence present in solution and another nucleic acid sequence immobilized on a solid support (e.g., paper, membranes, filters, chips, pins or glass slides, or any other appropriate substrate to which cells or their nucleic acids have been fixed).
- Immuno response can refer to conditions associated with inflammation, trauma, immune disorders, or infectious or genetic disease, etc. These conditions can be characterized by expression of various factors, e.g., cytokines, chemokines, and other signaling molecules, which may affect cellular and systemic defense systems.
- An "immunogenic fragment” is a polypeptide or oligopeptide fragment of PKIN which is capable of eliciting an immune response when introduced into a living organism, for example, a mammal.
- immunogenic fragment also includes any polypeptide or oligopeptide fragment of PKIN which is useful in any of the antibody production methods disclosed herein or known in the art.
- microarray refers to an arrangement of a plurality of polynucleotides, polypeptides, or other chemical compounds on a substrate.
- array element refers to a polynucleotide, polypeptide, or other chemical compound having a unique and defined position on a microarray.
- modulate refers to a change in the activity of PKIN. For example, modulation may cause an increase or a decrease in protein activity, binding characteristics, or any other biological, functional, or immunological properties of PKIN.
- nucleic acid and nucleic acid sequence refer to a nucleotide, oligonucleotide, polynucleotide, or any fragment thereof. These phrases also refer to DNA or RNA of genomic or synthetic origin which may be single-stranded or double-stranded and may represent the sense or the antisense strand, to peptide nucleic acid (PNA), or to any DNA-like or RNA-like material.
- PNA peptide nucleic acid
- operably linked refers to the situation in which a first nucleic acid sequence is placed in a functional relationship with a second nucleic acid sequence.
- a promoter is operably linked to a coding sequence if the promoter affects the transcription or expression of the coding sequence.
- Operably linked DNA sequences may be in close proximity or contiguous and, where necessary to join two protein coding regions, in the same reading frame.
- PNA protein nucleic acid
- PNA refers to an antisense molecule or anti-gene agent which comprises an oligonucleotide of at least about 5 nucleotides in length linked to a peptide backbone of amino acid residues ending in lysine. The terminal lysine confers solubility to the composition. PNAs preferentially bind complementary single stranded DNA or RNA and stop transcript elongation, and may be pegylated to extend their lifespan in the cell.
- Post-translational modification of an PKIN may involve lipidation, glycosylation, phosphorylation, acetylation, racemization, proteolytic cleavage, and other modifications known in the art. These processes may occur synthetically or biochemically. Biochemical modifications will vary by cell type depending on the enzymatic milieu of PKIN.
- Probe refers to nucleic acid sequences encoding PKIN, their complements, or fragments thereof, which are used to detect identical, allelic or related nucleic acid sequences. Probes are isolated oligonucleotides or polynucleotides attached to a detectable label or reporter molecule.
- Typical labels include radioactive isotopes, Iigands, chemiluminescent agents, and enzymes.
- "Primers" are short nucleic acids, usually DNA oligonucleotides, which may be annealed to a target polynucleotide by complementary base-pairing. The primer may then be extended along the target DNA strand by a DNA polymerase enzyme. Primer pairs can be used for amplification (and identification) of a nucleic acid sequence, e.g., by the polymerase chain reaction (PCR).
- Probes and primers as used in the present invention typically comprise at least 15 contiguous nucleotides of a known sequence. In order to enhance specificity, longer probes and primers may also be employed, such as probes and primers that comprise at least 20, 25, 30, 40, 50, 60, 70, 80, 90, 100, or at least 150 consecutive nucleotides of the disclosed nucleic acid sequences. Probes and primers may be considerably longer than these examples, and it is understood that any length supported by the r specification, including the tables, figures, and Sequence Listing, may be used.
- PCR primer pairs can be derived from a known sequence, for example, by using computer programs intended for that purpose such as Primer (Version 0.5, 1991, Whitehead Institute for Biomedical Research, Cambridge MA).
- Oligonucleotides for use as primers are selected using software known in the art for such purpose. For example, OLIGO 4.06 software is useful for the selection of PCR primer pairs of up to 100 nucleotides each, and for the analysis of oligonucleotides and larger polynucleotides of up to 5,000 nucleotides from an input polynucleotide sequence of up to 32 kilobases. Similar primer selection programs have incorporated additional features for expanded capabilities. For example, the PrimOU primer selection program (available to the public from the Genome Center at University of Texas South West Medical Center, Dallas TX) is capable of choosing specific primers from megabase sequences and is thus useful for designing primers on a genome-wide scope.
- the Primer3 primer selection program (available to the public from the Whitehead Institute/MIT Center for Genome Research, Cambridge MA) allows the user to input a "mispriming library," in which sequences to avoid as primer binding sites are user-specified. Primer3 is useful, in particular, for the selection of oligonucleotides for microarrays. (The source code for the latter two primer selection programs may also be obtained from their respective sources and modified to meet the user's specific needs.)
- the PrimeGen program (available to the public from the UK Human Genome Mapping Project Resource Centre, Cambridge UK) designs primers based on multiple sequence alignments, thereby allowing selection of primers that hybridize to either the most conserved or least conserved regions of aligned nucleic acid sequences.
- this program is useful for identification of both unique and conserved oligonucleotides and polynucleotide fragments.
- the oligonucleotides and polynucleotide fragments identified by any of the above selection methods are useful in hybridization technologies, for example, as PCR or sequencing primers, microarray elements, or specific probes to identify fully or partially complementary polynucleotides in a sample of nucleic acids. Methods of oligonucleotide selection are not limited to those described above.
- a "recombinant nucleic acid” is a sequence that is not naturally occurring or has a sequence that is made by an artificial combination of two or more otherwise separated segments of sequence. This artificial combination is often accomplished by chemical synthesis or, more commonly, by the artificial manipulation of isolated segments of nucleic acids, e.g., by genetic engineering techniques such as those described in Sambrook, supra.
- the term recombinant includes nucleic acids that have been altered solely by addition, substitution, or deletion of a portion of the nucleic acid.
- a recombinant nucleic acid may include a nucleic acid sequence operably linked to a promoter sequence. Such a recombinant nucleic acid may be part of a vector that is used, for example, to transform a cell.
- such recombinant nucleic acids may be part of a viral vector, e.g., based on a vaccinia virus, that could be use to vaccinate a mammal wherein the recombinant nucleic acid is expressed, inducing a protective immunological response in the mammal.
- a “regulatory element” refers to a nucleic acid sequence usually derived from untranslated regions of a gene and includes enhancers, promoters, introns, and 5' and 3' untranslated regions (UTRs). Regulatory elements interact with host or viral proteins which control transcription, translation, or RNA stability.
- Reporter molecules are chemical or biochemical moieties used for labeling a nucleic acid, amino acid, or antibody. Reporter molecules include radionuclides; enzymes; fluorescent, chemiluminescent, or chromogenic agents; substrates; cof actors; inhibitors; magnetic particles; and other moieties known in the art.
- RNA equivalent in reference to a DNA sequence, is composed of the same linear sequence of nucleotides as the reference DNA sequence with the exception that all occurrences of the nitrogenous base thymine are replaced with uracil, and the sugar backbone is composed of ribose instead of deoxyribose.
- sample is used in its broadest sense.
- a sample suspected of containing PKIN, nucleic acids encoding PKIN, or fragments thereof may comprise a bodily fluid; an extract from a cell, chromosome, organelle, or membrane isolated from a cell; a cell; genomic DNA, RNA, or cDNA, in solution or bound to a substrate; a tissue; a tissue print; etc.
- binding and “specifically binding” refer to that interaction between a protein or peptide and an agonist, an antibody, an antagonist, a small molecule, or any natural or synthetic binding composition. The interaction is dependent upon the presence of a particular structure of the protein, e.g., the antigenic determinant or epitope, recognized by the binding molecule. For example, if an antibody is specific for epitope "A,” the presence of a polypeptide comprising the epitope A, or the presence of free unlabeled A, in a reaction containing free labeled A and the antibody will reduce the amount of labeled A that binds to the antibody.
- substantially purified refers to nucleic acid or amino acid sequences that are removed from their natural environment and are isolated or separated, and are at least 60% free, preferably at least 75% free, and most preferably at least 90% free from other components with which they are naturally associated.
- Substrate refers to any suitable rigid or semi-rigid support including membranes, filters, chips, slides, wafers, fibers, magnetic or nonmagnetic beads, gels, tubing, plates, polymers, microparticles and capillaries.
- the substrate can have a variety of surface forms, such as wells, trenches, pins, channels and pores, to which polynucleotides or polypeptides are bound.
- a “transcript image” refers to the collective pattern of gene expression by a particular cell type or tissue under given conditions at a given time.
- Transformation describes a process by which exogenous DNA is introduced into a recipient cell. Transformation may occur under natural or artificial conditions according to various methods well known in the art, and may rely on any known method for the insertion of foreign nucleic acid sequences into a prokaryotic or eukaryotic host cell. The method for transformation is selected based on the type of host cell being transformed and may include, but is not limited to, bacteriophage or viral infection, electroporation, heat shock, lipofection, and particle bombardment.
- transformed cells includes stably transformed cells in which the inserted DNA is capable of replication either as an autonomously replicating plasmid or as part of the host chromosome, as well as transiently transformed cells which express the inserted DNA or RNA for limited periods of time.
- a "transgenic organism,” as used herein, is any organism, including but not limited to animals and plants, in which one or more of the cells of the organism contains heterologous nucleic acid introduced by way of human intervention, such as by transgenic techniques well known in the art.
- the nucleic acid is introduced into the cell, directly or indirectly by introduction into a precursor of the cell, by way of deliberate genetic manipulation, such as by microi ⁇ jection or by infection with a recombinant virus.
- the term genetic manipulation does not include classical cross-breeding, or in vitro fertilization, but rather is directed to the introduction of a recombinant DNA molecule.
- the transgenic organisms contemplated in accordance with the present invention include bacteria, cyanobacteria, fungi, plants and animals.
- the isolated DNA of the present invention can be introduced into the host by methods known in the art, for example infection, transfection, transformation or transconjugation. Techniques for transferring the DNA of the present invention into such organisms are widely known and provided in references such as Sambrook et al. (1989), supra.
- a "variant" of a particular nucleic acid sequence is defined as a nucleic acid sequence having at least 40% sequence identity to the particular nucleic acid sequence over a certain length of one of the nucleic acid sequences using blastn with the "BLAST 2 Sequences" tool Version 2.0.9 (May-07- 1999) set at default parameters.
- Such a pair of nucleic acids may show, for example, at least 50%, at least 60%, at least 70%, at least 80%, at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, or at least 99% or greater sequence identity over a certain defined length.
- a variant may be described as, for example, an "allelic” (as defined above), “splice,” “species,” or “polymorphic” variant.
- a splice variant may have significant identity to a reference molecule, but will generally have a greater or lesser number of polynucleotides due to alternative splicing of exons during mRNA processing.
- the corresponding polypeptide may possess additional functional domains or lack domains that are present in the reference molecule.
- Species variants are polynucleotide sequences that vary from one species to another. The resulting polypeptides will generally have significant amino acid identity relative to each other.
- a polymorphic variant is a variation in the polynucleotide sequence of a particular gene between individuals of a given species.
- Polymorphic variants also may encompass "single nucleotide polymorphisms" (SNPs) in which the polynucleotide sequence varies by one nucleotide base.
- SNPs single nucleotide polymorphisms
- the presence of SNPs may be indicative of, for example, a certain population, a disease state, or a propensity for a disease state.
- a "variant" of a particular polypeptide sequence is defined as a polypeptide sequence having at least 40% sequence identity to the particular polypeptide sequence over a certain length of one of the polypeptide sequences using blastp with the "BLAST 2 Sequences" tool Version 2.0.9 (May-07- 1999) set at default parameters.
- Such a pair of polypeptides may show, for example, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 91 %, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, or at least 99% or greater sequence identity over a certain defined length of one of the polypeptides.
- the invention is based on the discovery of new human kinases (PKIN), the polynucleotides encoding PKIN, and the use of these compositions for the diagnosis, treatment, or prevention of cancer, immune disorders, disorders affecting growth and development, cardiovascular diseases, and lipid disorders.
- PKIN human kinases
- Table 1 summarizes the nomenclature for the full length polynucleotide and polypeptide sequences of the invention. Each polynucleotide and its corresponding polypeptide are correlated to a single Incyte project identification number (Incyte Project ID). Each polypeptide sequence is denoted by both a polypeptide sequence identification number (Polypeptide SEQ ID NO:) and an Incyte polypeptide sequence number (Incyte Polypeptide ID) as shown.
- Each polynucleotide sequence is denoted by both a polynucleotide sequence identification number (Polynucleotide SEQ ID NO:) and an Incyte polynucleotide consensus sequence number (Incyte Polynucleotide ID) as shown.
- Table 2 shows sequences with homology to the polypeptides of the invention as identified by BLAST analysis against the GenBank protein (genpept) database.
- Columns 1 and 2 show the polypeptide sequence identification number (Polypeptide SEQ ID NO:) and the corresponding Incyte polypeptide sequence number (Incyte Polypeptide JD) for polypeptides of the invention.
- Column 3 shows the GenBank identification number (Genbank ID NO:) of the nearest GenBank homolog.
- Column 4 shows the probability score for the match between each polypeptide and its GenBank homolog.
- Column 5 shows the annotation of the GenBank homolog along with relevant citations where applicable, all of which are expressly incorporated by reference herein.
- Table 3 shows various structural features of the polypeptides of the invention.
- Columns 1 and 2 show the polypeptide sequence identification number (SEQ ID NO:) and the corresponding Incyte polypeptide sequence number (Incyte Polypeptide ID) for each polypeptide of the invention.
- Column 3 shows the number of amino acid residues in each polypeptide.
- Column 4 shows potential phosphorylation sites, and column 5 shows potential glycosylation sites, as determined by the MOTIFS program of the GCG sequence analysis software package (Genetics Computer Group, Madison WI).
- Column 6 shows amino acid residues comprising signature sequences, domains, and motifs.
- Column 7 shows analytical methods for protein structure/function analysis and in some cases, searchable databases to which the analytical methods were applied.
- SEQ ID NO: 12 is 95% identical to a human adenylate kinase (GenBank ID g28577) as determined by the Basic Local Alignment Search Tool (BLAST). (See Table 2).
- the BLAST probability score is 2.4e-112, which indicates the probability of obtaining the observed polypeptide sequence alignment by chance.
- Data from BLIMPS, MOTIFS, and PROFILE analysis; from BLAST analysis using the DOMO and PRODOM databases; and from HMMER analysis using the PFAM database further support the categorization of SEQ ID NO: 12 as an adenylate kinase.
- SEQ ID NO: 13 is 92% identical to rat PCTAIRE 3 (GenBank ID g2257588) as determined by the Basic Local Alignment Search Tool (BLAST).
- the BLAST probability score is 1.4e-210, which indicates the probability of obtaining the observed polypeptide sequence alignment by chance (Table 2).
- PCTAIRE 1, 2, and 3 comprise a subfamily of Cdc2-related kinases that are primarily expressed in post-mitotic cells. PCTAIRE 2 and PCTAIRE 3 are expressed in the brain (Hirose, T. et al.. (1997) Eur. J. Biochem. 249:481-488; Okuda, T. et al.. (1992) Oncogene 7:2249-2258).
- SEQ ID NO:13 also contains a kinase active site domain as determined by searching for statistically significant matches in the hidden Markov model (HMM)-based PFAM database of conserved protein family domains.
- HMM hidden Markov model
- SEQ ID NO: 18 is 86% identical to human cell cycle related kinase (GenBank ID g4090958) as determined by the Basic Local Alignment Search Tool (BLAST).
- BLAST Basic Local Alignment Search Tool
- the BLAST probability score is 9.2e-85, which indicates the probability of obtaining the observed polypeptide sequence alignment by chance.
- SEQ ID NO: 18 also contains a eukaryotic protein kinase domain as determined by searching for statistically significant matches in the hidden Markov model (HMM)-based PFAM database of conserved protein family domains. (See Table 3.) Data from BLIMPS, MOTIFS, and PROFILESCAN analyses provide further corroborative evidence that SEQ ID NO: 18 is a cell cycle related kinase. SEQ ID NO: 1-11 and SEQ ID NO: 14-17 were analyzed and annotated in a similar manner. The algorithms and parameters for the analysis of SEQ ID NO:l-18 are described in Table 7.
- the full length polynucleotide sequences of the present invention were assembled using cDNA sequences or coding (exon) sequences derived from genomic DNA, or any combination of these two types of sequences.
- Columns 1 and 2 list the polynucleotide sequence identification number (Polynucleotide SEQ ID NO:) and the corresponding Incyte polynucleotide consensus sequence number (Incyte Polynucleotide ID) for each polynucleotide of the invention.
- Column 3 shows the length of each polynucleotide sequence in basepairs.
- Column 4 lists fragments of the polynucleotide sequences which are useful, for example, in hybridization or amplification technologies that identify SEQ ID NO: 19-36 or that distinguish between SEQ ID NO: 19-36 and related polynucleotide sequences.
- Column 5 shows identification numbers corresponding to cDNA sequences, coding sequences (exons) predicted from genomic DNA, and/or sequence assemblages comprised of both cDNA and genomic DNA. These sequences were used to assemble the full length polynucleotide sequences of the invention.
- Columns 6 and 7 of Table 4 show the nucleotide start (5') and stop (3') positions of the cDNA and genomic sequences in column 5 relative to their respective full length sequences.
- the identification numbers in Column 5 of Table 4 may refer specifically, for example, to Incyte cDNAs along with their corresponding cDNA libraries.
- 6311370H1 is the identification number of an Incyte cDNA sequence
- NERDTDN03 is the cDNA library from which it is derived.
- Incyte cDNAs for which cDNA libraries, are not indicated were derived from pooled cDNA libraries (e.g., 70518523D1).
- the identification numbers in 5 may refer to GenBank cDNAs or ESTs (e.g., gl860144) which contributed to the assembly of the full length polynucleotide sequences.
- the identification numbers in column 5 may refer to coding regions predicted by Genscan analysis of genomic DNA.
- GNN.g5924006_004.edit is the identification number of a Genscan-predicted coding sequence, with g5924006 being the GenBank identification number of the sequence to which Genscan was applied.
- the Genscan- predicted coding sequences may have been edited prior to assembly.
- the identification numbers in column 5 may refer to assemblages of both cDNA and Genscan-predicted exons brought together by an "exon stitching" algorithm.
- the identification numbers in column 5 may refer to assemblages of both cDNA and Genscan-predicted exons brought together by an "exon-stretching" algorithm. (See Example V.) In some cases, Incyte cDNA coverage redundant with the sequence coverage shown in column 5 was obtained to confirm the final consensus polynucleotide sequence, but the relevant Incyte cDNA identification numbers are not shown.
- Table 5 shows the representative cDNA libraries for those full length polynucleotide sequences which were assembled using Incyte cDNA sequences.
- the representative cDNA library is the Incyte cDNA library which is most frequently represented by the Incyte cDNA sequences which were used to assemble and confirm the above polynucleotide sequences.
- the tissues and vectors which were used to construct the cDNA libraries shown in Table 5 are described in Table 6.
- the invention also encompasses PKIN variants.
- a preferred PKIN variant is one which has at least about 80%, or alternatively at least about 90%, or alternatively at least about 95%, or even at least about 98% amino acid sequence identity to the PKIN amino acid sequence, and which contains at least one functional or structural characteristic of PKIN.
- the invention also encompasses polynucleotides which encode PKIN.
- the invention encompasses a polynucleotide sequence comprising a sequence selected from the group consisting of SEQ ID NO: 19-36, which encodes PKIN.
- the polynucleotide sequences of SEQ ID NO: 19-36, as presented in the Sequence Listing, embrace the equivalent RNA sequences, wherein occurrences of the nitrogenous base thymine are replaced with uracil, and the sugar backbone is composed of ribose instead of deoxyribose.
- the invention also encompasses a variant of a polynucleotide sequence encoding PKIN.
- a variant polynucleotide sequence will have at least about 70%, or alternatively at least about 85%, or alternatively at least about 95%, or even at least about 98% polynucleotide sequence identity to the polynucleotide sequence encoding PKIN.
- a particular aspect of the invention encompasses a variant of a polynucleotide sequence comprising a sequence selected from the group consisting of SEQ ID NO: 19-36 which has at least about 70%, or alternatively at least about 85%, or alternatively at least about 95%, or even at least about 98% polynucleotide sequence identity to a nucleic acid sequence selected from the group consisting of SEQ ID NO: 19-36.
- Any one of the polynucleotide variants described above can encode an amino acid sequence which contains at least one functional or structural characteristic of PKIN.
- nucleotide sequences which encode PKIN and its variants are generally capable of hybridizing to the nucleotide sequence of the naturally occurring PKIN under appropriately selected conditions of stringency, it may be advantageous to produce nucleotide sequences encoding PKIN or its derivatives possessing a substantially different codon usage, e.g., inclusion of non-naturally occurring codons. Codons may be selected to increase the rate at which expression of the peptide occurs in a particular prokaryotic or eukaryotic host in accordance with the frequency with which particular codons are utilized by the host.
- RNA transcripts having more desirable properties such as a greater half-life, than transcripts produced from the naturally occurring sequence.
- the invention also encompasses production of DNA sequences which encode PKIN and
- PKIN derivatives, or fragments thereof, entirely by synthetic chemistry After production, the synthetic sequence may be inserted into any of the many available expression vectors and cell systems using reagents well known in the art. Moreover, synthetic chemistry may be used to introduce mutations into a sequence encoding PKIN or any fragment thereof. Also encompassed by the invention are polynucleotide sequences that are capable of hybridizing to the claimed polynucleotide sequences, and, in particular, to those shown in SEQ ID NO: 19-36 and fragments thereof under various conditions of stringency. (See, e.g., Wahl, G.M. and S.L. Berger (1987) Methods Enzymol. 152:399-407; Kimmel, A.R.
- Hybridization conditions including annealing and wash conditions, are described in "Definitions.”
- Methods for DNA sequencing are well known in the art and may be used to practice any of the embodiments of the invention.
- the methods may employ such enzymes as the Klenow fragment of DNA polymerase I, SEQUENASE (US Biochemical, Cleveland OH), Taq polymerase (Applied Biosystems), thermostable T7 polymerase (Amersham Pharmacia Biotech, Piscataway NJ), or combinations of polymerases and proofreading exonucleases such as those found in the ELONGASE amplification system (Life Technologies, Gaithersburg MD).
- sequence preparation is automated with machines such as the MICROLAB 2200 liquid transfer system (Hamilton, Reno NV), PTC200 thermal cycler (MJ Research, Watertown MA) and ABI CATALYST 800 thermal cycler (Applied Biosystems). Sequencing is then carried out using either the ABI 373 or 377 DNA sequencing system (Applied Biosystems), the MEGABACE 1000 DNA sequencing system
- PKIN Molecular Dynamics, Sunnyvale CA
- the resulting sequences are analyzed using a variety of algorithms which are well known in the art. (See, e.g., Ausubel, F.M. (1997) Short Protocols in Molecular Biology. John Wiley & Sons, New York NY, unit 7.7; Meyers, R.A. (1995) Molecular Biology and Biotechnology. Wiley VCH, New York NY, pp. 856-853.)
- the nucleic acid sequences encoding PKIN may be extended utilizing a partial nucleotide sequence and employing various PCR-based methods known in the art to detect upstream sequences, such as promoters and regulatory elements.
- restriction-site PCR uses universal and nested primers to amplify unknown sequence from genomic DNA within a cloning vector.
- Another method inverse PCR, uses primers that extend in divergent directions to amplify unknown sequence from a circularized template.
- the template is derived from restriction fragments comprising a known genomic locus and surrounding sequences.
- a third method involves PCR amplification of DNA fragments adjacent to known sequences in human and yeast artificial chromosome DNA.
- multiple restriction enzyme digestions and ligations may be used to insert an engineered double-stranded sequence into a region of unknown sequence before performing PCR.
- Other methods which may be used to retrieve unknown sequences are known in the art. (See, e.g., Parker, JD. et al. (1991) Nucleic Acids Res. 19:3055-3060).
- primers may be designed using commercially available software, such as OLIGO 4.06 primer analysis software (National Biosciences, Plymouth MN) or another appropriate program, to be about 22 to 30 nucleotides in length, to have a GC content of about 50% or more, and to anneal to the template at temperatures of about 68 °C to 72°C.
- OLIGO 4.06 primer analysis software National Biosciences, Plymouth MN
- anneal to the template at temperatures of about 68 °C to 72°C.
- random-primed libraries which often include sequences containing the 5' regions of genes, are preferable for situations in which an oligo d(T) library does not yield a full-length cDNA.
- Genomic libraries may be useful for extension of sequence into 5 ' non-transcribed regulatory regions .
- Capillary electrophoresis systems which are commercially available may be used to analyze the size or confirm the nucleotide sequence of sequencing or PCR products.
- capillary sequencing may employ flowable polymers for electrophoretic separation, four different nucleotide- specific, laser-stimulated fluorescent dyes, and a charge coupled device camera for detection of the emitted wavelengths.
- Output/light intensity may be converted to electrical signal using appropriate software (e.g., GENOTYPER and SEQUENCE NAVIGATOR, Applied Biosystems), and the entire process from loading of samples to computer analysis and electronic data display may be computer controlled.
- Capillary electrophoresis is especially preferable for sequencing small DNA fragments which may be present in limited amounts in a particular sample.
- polynucleotide sequences or fragments thereof which encode PKTN may be cloned in recombinant DNA molecules that direct expression of PKIN, or fragments or functional equivalents thereof, in appropriate host cells. Due to the inherent degeneracy of the genetic code, other DNA sequences which encode substantially the same or a functionally equivalent amino acid sequence may be produced and used to express PKTN.
- the nucleotide sequences of the present invention can be engineered using methods generally known in the art in order to alter PKIN-encoding sequences for a variety of purposes including, but not limited to, modification of the cloning, processing, and/or expression of the gene product.
- DNA shuffling by random fragmentation and PCR reassembly of gene fragments and synthetic oligonucleotides may be used to engineer the nucleotide sequences.
- oligonucleotide- mediated site-directed mutagenesis may be used to introduce mutations that create new restriction sites, alter glycosylation patterns, change codon preference, produce splice variants, and so forth.
- the nucleotides of the present invention may be subjected to DNA shuffling techniques such as MOLECULARBREEDING (Maxygen Inc., Santa Clara CA; described in U.S. Patent Number 5,837,458; Chang, C.-C. et al. (1999) Nat. Biotechnol. 17:793-797; Christians, F.C. et al. (1999) Nat. Biotechnol. 17:259-264; and Crameri, A. et al. (1996) Nat. Biotechnol. 14:315-319) to alter or improve the biological properties of PKTN, such as its biological or enzymatic activity or its ability to bind to other molecules or compounds.
- MOLECULARBREEDING Maxygen Inc., Santa Clara CA; described in U.S. Patent Number 5,837,458; Chang, C.-C. et al. (1999) Nat. Biotechnol. 17:793-797; Christians, F.C. et
- DNA shuffling is a process by which a library of gene variants is produced using PCR-mediated recombination of gene fragments. The library is then subjected to selection or screening procedures that identify those gene variants with the desired properties. These preferred variants may then be pooled and further subjected to recursive rounds of DNA shuffling and selection/screening.
- genetic diversity is created through "artificial" breeding and rapid molecular evolution. For example, fragments of a single gene containing random point mutations may be recombined, screened, and then reshuffled until the desired properties are optimized. Alternatively, fragments of a given gene may be recombined with fragments of homologous genes in the same gene family, either from the same or different species, thereby maximizing the genetic diversity of multiple naturally occurring genes in a directed and controllable manner.
- sequences encoding PKTN may be synthesized, in whole or in part, using chemical methods well known in the art. (See, e.g., Caruthers, M.H. et al. (1980) Nucleic Acids Symp. Ser. 7:215-223; and Horn, T. et al. (1980) Nucleic Acids Symp. Ser. 7:225-232.)
- PKTN itself or a fragment thereof may be synthesized using chemical methods.
- peptide synthesis can be performed using various solution-phase or solid-phase techniques. (See, e.g., Creighton, T. (1984) Proteins. Structures and Molecular Properties. WH Freeman, New York NY, pp. 55-60; and Roberge, J.Y. et al. (1995) Science 269:202-204.) Automated synthesis may be achieved using the ABI 431A peptide synthesizer (Applied Biosystems).
- amino acid sequence of PKTN may be altered during direct synthesis and/or combined with sequences from other proteins, or any part thereof, to produce a variant polypeptide or a polypeptide having a sequence of a naturally occurring polypeptide.
- the peptide may be substantially purified by preparative high performance liquid chromatography. (See, e.g., Chiez, R.M. and F.Z. Regnier (1990) Methods Enzymol. 182:392-421.)
- the composition of the synthetic peptides may be confirmed by amino acid analysis or by sequencing. (See, e.g., Creighton, supra, pp. 28-53.)
- the nucleotide sequences encoding PKIN or derivatives thereof may be inserted into an appropriate expression vector, i.e., a vector which contains the necessary elements for transcriptional and translational control of the inserted coding sequence in a suitable host.
- these elements include regulatory sequences, such as enhancers, constitutive and inducible promoters, and 5' and 3' untranslated regions in the vector and in polynucleotide sequences encoding PKIN. Such elements may vary in their strength and specificity.
- Specific initiation signals may also be used to achieve more efficient translation of sequences encoding PKIN. Such signals include the ATG initiation codon and adjacent sequences, e.g. the Kozak sequence.
- microorganisms such as bacteria transformed with recombinant bacteriophage, plasmid, or cosmid DNA expression vectors; yeast transformed with yeast expression vectors; insect cell systems infected with viral expression vectors (e.g., baculovirus); plant cell systems transformed with viral expression vectors (e.g., cauliflower mosaic virus, CaMV, or tobacco mosaic virus, TMV) or with bacterial expression vectors (e.g., Ti or pBR322 plasmids); or animal cell systems.
- microorganisms such as bacteria transformed with recombinant bacteriophage, plasmid, or cosmid DNA expression vectors
- yeast transformed with yeast expression vectors insect cell systems infected with viral expression vectors (e.g., baculovirus)
- plant cell systems transformed with viral expression vectors e.g., cauliflower mosaic virus, CaMV, or tobacco mosaic virus, TMV
- bacterial expression vectors e.g., Ti or pBR322 plasmids
- Expression vectors derived from retroviruses, adenoviruses, or herpes or vaccinia viruses, or from various bacterial plasmids may be used for delivery of nucleotide sequences to the targeted organ, tissue, or cell population.
- the invention is not limited by the host cell employed.
- a number of cloning and expression vectors may be selected depending upon the use intended for polynucleotide sequences encoding PKIN.
- routine cloning, subcloning, and propagation of polynucleotide sequences encoding PKIN can be achieved using a multifunctional E. coli vector such as PBLUESCRJPT (Stratagene, La Jolla CA) or PSPORT1 plasmid (Life Technologies). Ligation of sequences encoding PKTN into the vector's multiple cloning site disrupts the lacX gene, allowing a colorimetric screening procedure for identification of transformed bacteria containing recombinant molecules.
- these vectors may be useful for in vitro transcription, dideoxy sequencing, single strand rescue with helper phage, and creation of nested deletions in the cloned sequence.
- vectors which direct high level expression of PKIN may be used.
- vectors containing the strong, inducible SP6 or T7 bacteriophage promoter may be used.
- Yeast expression systems may be used for production of PKIN.
- a number of vectors containing constitutive or inducible promoters may be used in the yeast Saccharomyces cerevisiae or Pichia pastoris.
- constitutive or inducible promoters such as alpha factor, alcohol oxidase, and PGH promoters
- such vectors direct either the secretion or intracellular retention of expressed proteins and enable integration of foreign sequences into the host genome for stable propagation.
- Plant systems may also be used for expression of PKIN. Transcription of sequences encoding PKTN may be driven by viral promoters, e.g., the 35S and 19S promoters of CaMV used alone or in combination with the omega leader sequence from TMV (Takamatsu, N. (1987) EMBO J. 3:17-311). Alternatively, plant promoters such as the small subunit of RUBISCO or heat shock promoters may be used. (See, e.g., Coruzzi, G. et al. (1984) EMBO J. 3:1671-1680; Broglie, R. et al. (1984) Science 224:838-843; and Winter, J. et al. (1991) Results Probl.
- a number of viral-based expression systems may be utilized.
- sequences encoding PKIN may be ligated into an adenovirus transcription/translation complex consisting of the late promoter and tripartite leader sequence. Insertion in a non-essential El or E3 region of the viral genome may be used to obtain infective virus which expresses PKJN in host cells.
- transcription enhancers such as the Rous sarcoma virus (RSV) enhancer, may be used to increase expression in mammalian host cells.
- SV40 or EBV- based vectors may also be used for high-level protein expression.
- HACs Human artificial chromosomes
- HACs may also be employed to deliver larger fragments of DNA than can be contained in and expressed from a plasmid.
- HACs of about 6 kb to 10 Mb are constructed and delivered via conventional delivery methods (liposomes, polycationic amino polymers, or vesicles) for therapeutic purposes. (See, e.g., Harrington, J.J. et al. (1997) Nat. Genet. 15:345-355.)
- sequences encoding PKIN can be transformed into cell lines using expression vectors which may contain viral origins of replication and/or endogenous expression elements and a selectable marker gene on the same or on a separate vector. Following the introduction of the vector, cells may be allowed to grow for about 1 to 2 days in enriched media before being switched to selective media.
- the purpose of the selectable marker is to confer resistance to a selective agent, and its presence allows growth and recovery of cells which successfully express the introduced sequences.
- Resistant clones of stably transformed cells may be propagated using tissue culture techniques appropriate to the cell type.
- selection systems may be used to recover transformed cell lines. These include, but are not limited to, the herpes simplex virus thymidine kinase and adenine phosphoribosyltransferase genes, for use in tk ' and ap cells, respectively. (See, e.g., Wigler, M. et al. (1977) Cell 11:223-232; Lowy, I. et al. (1980) Cell 22:817-823.) Also, antimetabolite, antibiotic, or herbicide resistance can be used as the basis for selection.
- dhfr confers resistance to methotrexate
- neo confers resistance to the aminoglycosides neomycin and G-418
- als and pat confer resistance to chlorsulfuron and phosphinotricin acetyltransferase, respectively.
- Additional selectable genes have been described, e.g., trpB and hisD, which alter cellular requirements for metabolites.
- Visible markers e.g., anthocyanins, green fluorescent proteins (GFP; Clontech), ⁇ glucuronidase and its substrate ⁇ -glucuronide, or luciferase and its substrate luciferin may be used. These markers can be used not only to identify transformants, but also to quantify the amount of transient or stable protein expression attributable to a specific vector system. (See, e.g., Rhodes, CA. (1995) Methods Mol. Biol. 55:121-131.)
- marker gene expression suggests that the gene of interest is also present, the presence and expression of the gene may need to be confirmed.
- sequence encoding PKIN is inserted within a marker gene sequence
- transformed cells containing sequences encoding PKIN can be identified by the absence of marker gene function.
- a marker gene can be placed in tandem with a sequence encoding PKIN under the control of a single promoter. Expression of the marker gene in response to induction or selection usually indicates expression of the tandem gene as well.
- PKIN may be identified by a variety of procedures known to those of skill in the art. These procedures include, but are not limited to, DNA-DNA or DNA-RNA hybridizations, PCR amplification, and protein bioassay or immunoassay techniques which include membrane, solution, or chip based technologies for the detection and/or quantification of nucleic acid or protein sequences. Immunological methods for detecting and measuring the expression of PKIN using either specific polyclonal or monoclonal antibodies are known in the art. Examples of such techniques include enzyme-linked immunosorbent assays (ELISAs), radioimmunoassays (RIAs), and fluorescence activated cell sorting (FACS).
- ELISAs enzyme-linked immunosorbent assays
- RIAs radioimmunoassays
- FACS fluorescence activated cell sorting
- a two-site, monoclonal-based immunoassay utilizing monoclonal antibodies reactive to two non-interfering epitopes on PKTN is preferred, but a competitive binding assay may be employed.
- a competitive binding assay may be employed.
- assays are well known in the art. (See, e.g., Hampton, R. et al. (1990) Serological Methods, a Laboratory Manual. APS Press, St. Paul MN, Sect. IN; Coligan, J.E. et al. (1997) Current Protocols in Immunology. Greene Pub. Associates and Wiley-Interscience, New York NY; and Pound, J.D. (1998) Immunochemical Protocols.
- Means for producing labeled hybridization or PCR probes for detecting sequences related to polynucleotides encoding PKIN include oligolabeling, nick translation, end-labeling, or PCR amplification using a labeled nucleotide.
- sequences encoding PKIN, or any fragments thereof may be cloned into a vector for the production of an mRNA probe.
- RNA polymerase such as T7, T3, or SP6 and labeled nucleotides.
- T7, T3, or SP6 RNA polymerase
- reporter molecules or labels which may be used for ease of detection include radionuclides, enzymes, fluorescent, chemiluminescent, or chromogenic agents, as well as substrates, cofactors, inhibitors, magnetic particles, and the like.
- Host cells transformed with nucleotide sequences encoding PKTN may be cultured under conditions suitable for the expression and recovery of the protein from cell culture.
- the protein produced by a transformed cell may be secreted or retained intracellularly depending on the sequence and/or the vector used.
- expression vectors containing polynucleotides which encode PKIN may be designed to contain signal sequences which direct secretion of PKTN through a prokaryotic or eukaryotic cell membrane.
- a host cell strain may be chosen for its ability to modulate expression of the inserted sequences or to process the expressed protein in the desired fashion.
- modifications of the polypeptide include, but are not limited to, acetylation, carboxylation, glycosylation, phosphorylation, lipidation, and acylation.
- Post-translational processing which cleaves a "prepro” or “pro” form of the protein may also be used to specify protein targeting, folding, and/or activity.
- Different host cells which have specific cellular machinery and characteristic mechanisms for post-translational activities (e.g., CHO, HeLa, MDCK, HEK293, and WI38) are available from the American Type Culture Collection (ATCC, Manassas VA) and may be chosen to ensure the correct modification and processing of the foreign protein.
- ATCC American Type Culture Collection
- natural, modified, or recombinant nucleic acid sequences encoding PKTN may be ligated to a heterologous sequence resulting in translation of a fusion protein in any of the aforementioned host systems.
- a chimeric PKTN protein containing a heterologous moiety that can be recognized by a commercially available antibody may facilitate the screening of peptide libraries for inhibitors of PKTN activity.
- Heterologous protein and peptide moieties may also facilitate purification of fusion proteins using commercially available affinity matrices.
- Such moieties include, but are not limited to, glutathione S-transferase (GST), maltose binding protein (MBP), thioredoxin (Trx), calmodulin binding peptide (CBP), 6-His, FLAG, c-myc, and hemagglutinin (HA).
- GST, MBP, Trx, CBP, and 6-His enable purification of their cognate fusion proteins on immobilized glutathione, maltose, phenylarsine oxide, calmodulin, and metal-chelate resins, respectively.
- FLAG, c-myc, and hemagglutinin (HA) enable immunoaffinity purification of fusion proteins using commercially available monoclonal and polyclonal antibodies that specifically recognize these epitope tags.
- a fusion protein may also be engineered to contain a proteolytic cleavage site located between the PKIN encoding sequence and the heterologous protein sequence, so that PKIN may be cleaved away from the heterologous moiety following purification. Methods for fusion protein expression and purification are discussed in Ausubel (1995, supra, ch. 10). A variety of commercially available kits may also be used to facilitate expression and purification of fusion proteins.
- synthesis of radiolabeled PKIN may be achieved in vitro using the TNT rabbit reticulocyte lysate or wheat germ extract system (Promega). These systems couple transcription and translation of protein-coding sequences operably associated with the T7, T3, or SP6 promoters. Translation takes place in the presence of a radiolabeled amino acid precursor, for example, 35 S-methionine.
- PKIN of the present invention or fragments thereof may be used to screen for compounds that specifically bind to PKTN. At least one and up to a plurality of test compounds may be screened for specific binding to PKIN. Examples of test compounds include antibodies, oligonucleotides, proteins (e.g., receptors), or small molecules.
- the compound thus identified is closely related to the natural ligand of PKIN, e.g., a ligand or fragment thereof, a natural substrate, a structural or functional mimetic, or a natural binding partner.
- the compound can be closely related to the natural receptor to which PKIN binds, or to at least a fragment of the receptor, e.g., the ligand binding site.
- the compound can be rationally designed using known techniques.
- screening for these compounds involves producing appropriate cells which express PKTN, either as a secreted protein or on the cell membrane.
- Preferred cells include cells from mammals, yeast, Drosophila. or E. coli.
- Cells expressing PKIN or cell membrane fractions which contain PKIN are then contacted with a test compound and binding, stimulation, or inhibition of activity of either PKIN or the compound is analyzed.
- An assay may simply test binding of a test compound to the polypeptide, wherein binding is detected by a fluorophore, radioisotope, enzyme conjugate, or other detectable label.
- the assay may comprise the steps of combining at least one test compound with PKIN, either in solution or affixed to a solid support, and detecting the binding of PKIN to the compound.
- the assay may detect or measure binding of a test compound in the presence of a labeled competitor.
- the assay may be carried out using cell-free preparations, chemical libraries, or natural product mixtures, and the test compound(s) may be free in solution or affixed to a solid support.
- PKIN of the present invention or fragments thereof may be used to screen for compounds that modulate the activity of PKTN.
- Such compounds may include agonists, antagonists, or partial or inverse agonists.
- an assay is performed under conditions permissive for PKTN activity, wherein PKTN is combined with at least one test compound, and the activity of PKIN in the presence of a test compound is compared with the activity of PKIN in the absence of the test compound. A change in the activity of PKIN in the presence of the test compound is indicative of a compound that modulates the activity of PKIN.
- a test compound is combined with an in vitro or cell-free system comprising PKTN under conditions suitable for PKTN activity, and the assay is performed. In either of these assays, a test compound which modulates the activity of PKIN may do so indirectly and need not come in direct contact with the test compound. At least one and up to a plurality of test compounds may be screened.
- polynucleotides encoding PKTN or their mammalian homologs may be "knocked out" in an animal model system using homologous recombination in embryonic stem (ES) cells.
- ES embryonic stem
- Such techniques are well known in the art and are useful for the generation of animal models of human disease.
- mouse ES cells such as the mouse 129/SvJ cell line, are derived from the early mouse embryo and grown in culture. The ES cells are transformed with a vector containing the gene of interest disrupted by a marker gene, e.g., the neomycin phosphotransferase gene (neo;
- the vector integrates into the corresponding region of the host genome by homologous recombination.
- homologous recombination takes place using the Cre-loxP system to knockout a gene of interest in a tissue- or developmental stage- specific manner (Marth, J.D. (1996) Clin. Invest. 97:1999-2002; Wagner, K.U. et al. (1997) Nucleic Acids Res. 25:4323-4330).
- Transformed ES cells are identified and microinjected into mouse cell blastocysts such as those from the C57BL/6 mouse strain.
- the blastocysts are surgically transferred to pseudopregnant dams, and the resulting chimeric progeny are genotyped and bred to produce heterozygous or homozygous strains. Transgenic animals thus generated may be tested with potential therapeutic or toxic agents.
- Polynucleotides encoding PKIN may also be manipulated in vitro in ES cells derived from human blastocysts.
- Human ES cells have the potential to differentiate into at least eight separate cell lineages including endoderm, mesoderm, and ectodermal cell types. These cell lineages differentiate into, for example, neural cells, hematopoietic lineages, and cardiomyocytes (Thomson, J.A. et al. (1998) Science 282: 1145-1147).
- Polynucleotides encoding PKIN can also be used to create "knockin” humanized animals (pigs) or transgenic animals (mice or rats) to model human disease.
- knockin technology a region of a polynucleotide encoding PKJN is injected into animal ES cells, and the injected sequence integrates into the animal cell genome.
- Transformed cells are injected into blastulae, and the blastulae are implanted as described above.
- Transgenic progeny or inbred lines are studied and treated with potential pharmaceutical agents to obtain information on treatment of a human disease.
- a mammal inbred to overexpress PKIN may also serve as a convenient source of that protein (Janne, J. et al. (1998) Biotechnol. Annu. Rev. 4:55-74).
- THERAPEUTICS Chemical and structural similarity, e.g., in the context of sequences and motifs, exists between regions of PKIN and human kinases.
- the expression of PKIN is closely associated with cancer, diseased, proliferative, cardiac, tumorous, and digestive tissues, degenerative diseases of the brain, suggesting that PKIN plays a role in necrotic disorders affecting the central nervous system, and neuronal tissues (e.g.
- PKIN appears to play a role in maintenance and potentially the neoplastic transformation of cells of the central nervous system, and in cancer, immune disorders, disorders affecting growth and development, cardiovascular diseases, and lipid disorders.
- PKIN In the treatment of disorders associated with increased PKIN expression or activity, it is desirable to decrease the expression or activity of PKIN.
- PKTN expression or activity In the treatment of disorders associated with decreased PKTN expression or activity, it is desirable to increase the expression or activity of PKIN.
- PKTN or a fragment or derivative thereof may be administered to a subject to treat or prevent a disorder associated with decreased expression or activity of PKIN.
- disorders include, but are not limited to, a cancer, such as adenocarcinoma, leukemia, lymphoma, melanoma, myeloma, sarcoma, teratocarcinoma, and, in particular, cancers of the adrenal gland, bladder, bone, bone marrow, brain, breast, cervix, gall bladder, ganglia, gastrointestinal tract, heart, kidney, liver, lung, muscle, ovary, pancreas, parathyroid, penis, prostate, salivary glands, skin, spleen, testis, thymus, thyroid, and uterus, leukemias such as multiple myeloma and lymphomas such as Hodgkin's disease; an immune disorder, such as acquired immunodeficiency syndrome (AIDS), Addison's disease, adult respiratory distress
- AIDS acquired immuno
- a vector capable of expressing PKIN or a fragment or derivative thereof may be administered to a subject to treat or prevent a disorder associated with decreased expression or activity of PKIN including, but not limited to, those described above.
- compositions comprising a substantially purified PKIN in conjunction with a suitable pharmaceutical carrier may be administered to a subject to treat or prevent a disorder associated with decreased expression or activity of PKTN including, but not limited to, those provided above.
- an agonist which modulates the activity of PKIN may be administered to a subject to treat or prevent a disorder associated with decreased expression or activity of PKIN including, but not limited to, those listed above.
- an antagonist of PKTN may be administered to a subject to treat or prevent a disorder associated with increased expression or activity of PKIN.
- disorders include, but are not limited to, those cancers, immune disorders, disorders affecting growth and development, cardiovascular diseases, and lipid disorders described above.
- an antibody which specifically binds PKIN may be used directly as an antagonist or indirectly as a targeting or delivery mechanism for bringing a pharmaceutical agent to cells or tissues which express PKTN.
- a vector expressing the complement of the polynucleotide encoding PKIN may be administered to a subject to treat or prevent a disorder associated with increased expression or activity of PKIN including, but not limited to, those described above.
- any of the proteins, antagonists, antibodies, agonists, complementary sequences, or vectors of the invention may be administered in combination with other appropriate therapeutic agents. Selection of the appropriate agents for use in combination therapy may be made by one of ordinary skill in the art, according to conventional pharmaceutical principles.
- the combination of therapeutic agents may act synergistically to effect the treatment or prevention of the various disorders described above. Using this approach, one may be able to achieve therapeutic efficacy with lower dosages of each agent, thus reducing the potential for adverse side effects.
- An antagonist of PKIN may be produced using methods which are generally known in the art.
- purified PKIN may be used to produce antibodies or to screen libraries of pharmaceutical agents to identify those which specifically bind PKIN.
- Antibodies to PKIN may also be generated using methods that are well known in the art. Such antibodies may include, but are not limited to, polyclonal, monoclonal, chimeric, and single chain antibodies, Fab fragments, and fragments produced by a Fab expression library. Neutralizing antibodies (i.e., those which inhibit dimer formation) are generally preferred for therapeutic use.
- various hosts including goats, rabbits, rats, mice, humans, and others may be immunized by injection with PKTN or with any fragment or oligopeptide thereof which has immunogenic properties.
- various adjuvants may be used to increase immunological response.
- adjuvants include, but are not limited to, Freund's, mineral gels such as aluminum hydroxide, and surface active substances such as lysolecithin, pluronic polyols, polyanions, peptides, oil emulsions, KLH, and dinitrophenol.
- BCG Bacilli Calmette-Guerin
- Corynebacterium parvum are especially preferable.
- the oligopeptides, peptides, or fragments used to induce antibodies to PKTN have an amino acid sequence consisting of at least about 5 amino acids, and generally will consist of at least about 10 amino acids. It is also preferable that these oligopeptides, peptides, or fragments are identical to a portion of the amino acid sequence of the natural protein. Short stretches of PKTN amino acids may be fused with those of another protein, such as KLH, and antibodies to the chimeric molecule may be produced. Monoclonal antibodies to PKTN may be prepared using any technique which provides for the production of antibody molecules by continuous cell lines in culture.
- hybridoma technique examples include, but are not limited to, the hybridoma technique, the human B-cell hybridoma technique, and the EBV-hybridoma technique.
- chimeric antibodies such as the splicing of mouse antibody genes to human antibody genes to obtain a molecule with appropriate antigen specificity and biological activity.
- techniques developed for the production of single chain antibodies may be adapted, using methods known in the art, to produce PKTN-specific single chain antibodies.
- Antibodies with related specificity, but of distinct idiotypic composition may be generated by chain shuffling from random combinatorial immunoglobulin libraries.
- Antibodies may also be produced by inducing in vivo production in the lymphocyte population or by screening immunoglobulin libraries or panels of highly specific binding reagents as disclosed in the literature.
- Antibody fragments which contain specific binding sites for PKIN may also be generated.
- such fragments include, but are not limited to, F(ab') 2 fragments produced by pepsin digestion of the antibody molecule and Fab fragments generated by reducing the disulfide bridges of the F(ab')2 fragments.
- Fab expression libraries may be constructed to allow rapid and easy identification of monoclonal Fab fragments with the desired specificity. (See, e.g., Huse, W.D. et al. (1989) Science 246:1275-1281.)
- Various immunoassays may be used for screening to identify antibodies having the desired specificity.
- K a association constant
- High-affinity antibody preparations with K a ranging from about 10 9 to 10 12 L/mole are preferred for use in immunoassays in which the PKIN-antibody complex must withstand rigorous manipulations.
- Low-affinity antibody preparations •with K a ranging from about 10 6 to 10 7 L/mole are preferred for use in immunopurification and similar procedures which ultimately require dissociation of PKIN, preferably in active form, from the antibody (Catty, D. (1988) Antibodies, Volume I: A Practical Approach, IRL Press, Washington DC; Liddell, J.E. and A. Cryer (1991) A Practical Guide to Monoclonal Antibodies, John Wiley & Sons, New York NY).
- polyclonal antibody preparations may be further evaluated to determine the quality and suitability of such preparations for certain downstream applications.
- a polyclonal antibody preparation containing at least 1-2 mg specific antibody/ml, preferably 5-10 mg specific antibody/ml is generally employed in procedures requiring precipitation of PKJN-antibody complexes.
- Procedures for evaluating antibody specificity, titer, and avidity, and guidelines for antibody quality and usage in various applications, are generally available. (See, e.g., Catty, supra, and Coligan et al. supra.)
- the polynucleotides encoding PKIN may be used for therapeutic purposes.
- modifications of gene expression can be achieved by designing complementary sequences or antisense molecules (DNA, RNA, PNA, or modified oligonucleotides) to the coding or regulatory regions of the gene encoding PKIN.
- complementary sequences or antisense molecules DNA, RNA, PNA, or modified oligonucleotides
- antisense oligonucleotides or larger fragments can be designed from various locations along the coding or control regions of sequences encoding PKTN.
- Antisense sequences can be delivered intracellularly in the form of an expression plasmid which, upon transcription, produces a sequence complementary to at least a portion of the cellular sequence encoding the target protein.
- Antisense sequences can also be introduced intracellularly through the use of viral vectors, such as retrovirus and adeno-associated virus vectors.
- viral vectors such as retrovirus and adeno-associated virus vectors.
- Other gene delivery mechanisms include liposome-derived systems, artificial viral envelopes, and other systems known in the art.
- polynucleotides encoding PKTN may be used for somatic or germline gene therapy.
- Gene therapy may be performed to (i) correct a genetic deficiency (e.g., in the cases of severe combined immunodeficiency (SCJD)-Xl disease characterized by X- linked inheritance (Cavazzana-Calvo, M. et al. (2000) Science 288:669-672), severe combined immunodeficiency syndrome associated with an inherited adenosine deaminase (ADA) deficiency (Blaese, R.M. et al. (1995) Science 270:475-480; Bordignon, C. et al.
- SCJD severe combined immunodeficiency
- ADA adenosine deaminase
- diseases or disorders caused by deficiencies in PKIN are treated by constructing mammalian expression vectors encoding PKIN and introducing these vectors by mechanical means into PKJN-deficient cells.
- Mechanical transfer technologies for use with cells in vivo or ex vitro include (i) direct DNA microinjection into individual cells, (ii) ballistic gold particle delivery, (iii) liposome-mediated transfection, (iv) receptor-mediated gene transfer, and (v) the use of DNA transposons (Morgan, R.A. and W.F. Anderson (1993) Annu. Rev. Biochem. 62:191-217; Ivies, Z. (1997) Cell 91:501-510; Boulay, J-L. and H.
- Expression vectors that may be effective for the expression of PKIN include, but are not limited to, the PCDNA 3.1, EPITAG, PRCCMV2, PREP, PVAX vectors (Invitrogen, Carlsbad CA), PCMV-SCRJPT, PCMV-TAG, PEGSH/PERV (Stratagene, La Jolla CA), and PTET-OFF, PTET-ON, PTRE2, PTRE2-LUC, PTK-HYG (Clontech, Palo Alto CA).
- PKIN may be expressed using (i) a constitutively active promoter, (e.g., from cytomegalovirus (CMV), Rous sarcoma virus (RSV), SV40 virus, thymidine kinase (TK), or ⁇ -actin genes), (ii) an inducible promoter (e.g., the tetracycline-regulated promoter (Gossen, M. and H. Bujard (1992) Proc. Natl. Acad. Sci. USA 89:5547-5551; Gossen, M. et al. (1995) Science 268:1766-1769; Rossi, F.M.V. and H.M. Blau (1998) Curr. Opin. Biotechnol.
- a constitutively active promoter e.g., from cytomegalovirus (CMV), Rous sarcoma virus (RSV), SV40 virus, thymidine kinase (TK), or ⁇ -actin genes
- liposome transformation kits e.g., the PERFECT LIPID TRANSFECTION KIT, available from Invitrogen
- PERFECT LIPID TRANSFECTION KIT available from Invitrogen
- transformation is performed using the calcium phosphate method (Graham, FL. and A.J. Eb (1973) Virology 52:456-467), or by electroporation (Neumann, E. et al. (1982) EMBO J. 1:841-845).
- the introduction of DNA to primary cells requires modification of these standardized mammalian transfection protocols.
- diseases or disorders caused by genetic defects with respect to PKIN expression are treated by constructing a retrovirus vector consisting of (i) the polynucleotide encoding PKIN under the control of an independent promoter or the retrovirus long terminal repeat (LTR) promoter, (ii) appropriate RNA packaging signals, and (iii) a Rev-responsive element (RRE) along with additional retrovirus cw-acting RNA sequences and coding sequences required for efficient vector propagation.
- Retrovirus vectors e.g., PFB and PFBNEO
- Retrovirus vectors are commercially available (Stratagene) and are based on published data (Riviere, I. et al. (1995) Proc. Natl. Acad. Sci.
- the vector is propagated in an appropriate vector producing cell line (VPCL) that expresses an envelope gene with a tropism for receptors on the target cells or a promiscuous envelope protein such as VSVg (Armentano, D. et al. (1987) J. Virol. 61:1647-1650; Bender, MA. et al. (1987) J. Virol. 61:1639-1646; Adam, M.A. and A.D. Miller (1988) J. Virol. 62:3802-3806; Dull, T. et al. (1998) J. Virol. 72:8463-8471; Zufferey, R. et al. (1998) J. Virol.
- VSVg vector producing cell line
- U.S. Patent Number 5,910,434 to Rigg discloses a method for obtaining retrovirus packaging cell lines and is hereby incorporated by reference. Propagation of retrovirus vectors, transduction of a population of cells (e.g., CD4 + T- cells), and the return of transduced cells to a patient are procedures well known to persons skilled in the art of gene therapy and have been well documented (Ranga, U. et al. (1997) J. Virol. 71:7020- 7029; Bauer, G. et al. (1997) Blood 89:2259-2267; Bonyhadi, ML. (1997) J. Virol. 71:4707-4716; Ranga, U. et al. (1998) Proc. Natl. Acad. Sci. USA 95:1201-1206; Su, L. (1997) Blood 89:2283- 2290).
- an adenovirus-based gene therapy delivery system is used to deliver polynucleotides encoding PKTN to cells which have one or more genetic abnormalities with respect to the expression of PKTN.
- the construction and packaging of adenovirus-based vectors are well known to those with ordinary skill in the art. Replication defective adenovirus vectors have proven to be versatile for importing genes encoding immunoregulatory proteins into intact islets in the pancreas (Csete, M.E. et al. (1995) Transplantation 27:263-268). Potentially useful adenoviral vectors are described in U.S. Patent Number 5,707,618 to Armentano ("Adenovirus vectors for gene therapy"), hereby incorporated by reference.
- a herpes-based, gene therapy delivery system is used to deliver polynucleotides encoding PKTN to target cells which have one or more genetic abnormalities with respect to the expression of PKIN.
- the use of herpes simplex virus (HSV)-based vectors may be especially valuable for introducing PKTN to cells of the central nervous system, for which HSV has a tropism.
- the construction and packaging of herpes-based vectors are well known to those with ordinary skill in the art.
- a replication-competent herpes simplex virus (HSV) type 1-based vector has been used to deliver a reporter gene to the eyes of primates (Liu, X. et al. (1999) Exp. Eye Res. 169:385-395).
- HSV-1 virus vector has also been disclosed in detail in U.S. Patent Number 5,804,413 to DeLuca ("Herpes simplex virus strains for gene transfer"), which is hereby incorporated by reference.
- U.S. Patent Number 5,804,413 teaches the use of recombinant HSV d92 which consists of a genome containing at least one exogenous gene to be transferred to a cell under the control of the appropriate promoter for purposes including human gene therapy. Also taught by this patent are the construction and use of recombinant HSV strains deleted for ICP4, ICP27 and ICP22.
- HSV vectors see also Goins, W.F. et al. (1999) J. Virol.
- herpesvirus sequences The manipulation of cloned herpesvirus sequences, the generation of recombinant virus following the transfection of multiple plasmids containing different segments of the large herpesvirus genomes, the growth and propagation of herpesvirus, and the infection of cells with herpesvirus are techniques well known to those of ordinary skill in the art.
- an alphavirus (positive, single-stranded RNA virus) vector is used to deliver polynucleotides encoding PKIN to target cells.
- SFV Semliki Forest Virus
- PKTN-coding RNAs results in the production of a large number of PKTN-coding RNAs and the synthesis of high levels of PKTN in vector transduced cells.
- alphavirus infection is typically associated with cell lysis within a few days
- BHK-21 hamster normal kidney cells
- SIN Sindbis virus
- the ability to establish a persistent infection in hamster normal kidney cells (BHK-21) with a variant of Sindbis virus (SIN) indicates that the lytic replication of alphaviruses can be altered to suit the needs of the gene therapy application (Dryga, S.A. et al. (1997) Virology 228:74-83).
- the wide host range of alphaviruses will allow the introduction of PKIN into a variety of cell types.
- the specific transduction of a subset of cells in a population may require the sorting of cells prior to transduction.
- the methods of manipulating infectious cDNA clones of alphaviruses, performing alphavirus cDNA and RNA transfections, and performing alphavirus infections, are well known to those with ordinary skill in the art.
- Oligonucleotides derived from the transcription initiation site may also be employed to inhibit gene expression. Similarly, inhibition can be achieved using triple helix base-pairing methodology. Triple helix pairing is useful because it causes inhibition of the ability of the double helix to open sufficiently for the binding of polymerases, transcription factors, or regulatory molecules. Recent therapeutic advances using triplex DNA have been described in the literature. (See, e.g., Gee, J.E. et al. (1994) in Huber, B.E. and B.I. Carr, Molecular and Immunologic Approaches, Futura Publishing, Mt. Kisco NY, pp. 163- 177.) A complementary sequence or antisense molecule may also be designed to block translation of mRNA by preventing the transcript from binding to ribosomes.
- Ribozymes enzymatic RNA molecules, may also be used to catalyze the specific cleavage of RNA.
- the mechanism of ribozyme action involves sequence-specific hybridization of the ribozyme molecule to complementary target RNA, followed by endonucleolytic cleavage.
- engineered hammerhead motif ribozyme molecules may specifically and efficiently catalyze endonucleolytic cleavage of sequences encoding PKTN.
- ribozyme cleavage sites within any potential RNA target are initially identified by scanning the target molecule for ribozyme cleavage sites, including the following sequences: GUA, GUU, and GUC. Once identified, short RNA sequences of between 15 and 20 ribonucleotides, corresponding to the region of the target gene containing the cleavage site, may be evaluated for secondary structural features which may render the oligonucleotide inoperable. The suitability of candidate targets may also be evaluated by testing accessibility to hybridization with complementary oligonucleotides using ribonuclease protection assays.
- RNA molecules and ribozymes of the invention may be prepared by any method known in the art for the synthesis of nucleic acid molecules. These include techniques for chemically synthesizing oligonucleotides such as solid phase phosphoramidite chemical synthesis.
- RNA molecules may be generated by in vitro and in vivo transcription of DNA sequences encoding PKIN. Such DNA sequences may be incorporated into a wide variety of vectors with suitable RNA polymerase promoters such as T7 or SP6.
- these cDNA constructs that synthesize complementary RNA, constitutively or inducibly, can be introduced into cell lines, cells, or tissues.
- RNA molecules may be modified to increase intracellular stability and half-life. Possible modifications include, but are not limited to, the addition of flanking sequences at the 5' and/or 3' ends of the molecule, or the use of phosphorothioate or 2' O-methyl rather than phosphodiesterase linkages within the backbone of the molecule.
- An additional embodiment of the invention encompasses a method for screening for a compound which is effective in altering expression of a polynucleotide encoding PKIN.
- Compounds which may be effective in altering expression of a specific polynucleotide may include, but are not limited to, oligonucleotides, antisense oligonucleotides, triple helix-forming oligonucleotides, transcription factors and other polypeptide transcriptional regulators, and non-macromolecular chemical entities which are capable of interacting with specific polynucleotide sequences. Effective compounds may alter polynucleotide expression by acting as either inhibitors or promoters of polynucleotide expression.
- a compound which specifically inhibits expression of the polynucleotide encoding PKIN may be therapeutically useful, and in the treament of disorders associated with decreased PKIN expression or activity, a compound which specifically promotes expression of the polynucleotide encoding PKIN may be therapeutically useful.
- test compounds may be screened for effectiveness in altering expression of a specific polynucleotide.
- a test compound may be obtained by any method commonly known in the art, including chemical modification of a compound known to be effective in altering polynucleotide expression; selection from an existing, commercially-available or proprietary library of naturally-occurring or non-natural chemical compounds; rational design of a compound based on chemical and/or structural properties of the target polynucleotide; and selection from a library of chemical compounds created combinatorially or randomly.
- a sample comprising a polynucleotide encoding PKIN is exposed to at least one test compound thus obtained.
- the sample may comprise, for example, an intact or permeabilized cell, or an in vitro cell-free or reconstituted biochemical system.
- Alterations in the expression of a polynucleotide encoding PKIN are assayed by any method commonly known in the art.
- the expression of a specific nucleotide is detected by hybridization with a probe having a nucleotide sequence complementary to the sequence of the polynucleotide encoding PKIN.
- the amount of hybridization may be quantified, thus forming the basis for a comparison of the expression of the polynucleotide both with and without exposure to one or more test compounds.
- a screen for a compound effective in altering expression of a specific polynucleotide can be carried out, for example, using a Schizosaccharomyces pombe gene expression system (Atkins, D. et al. (1999) U.S. Patent No. 5,932,435; Arndt, G.M. et al. (2000) Nucleic Acids Res. 28. ⁇ 15) or a human cell line such as HeLa cell (Clarke, M . et al. (2000) Biochem. Biophys. Res. Commun.
- a particular embodiment of the present invention involves screening a combinatorial library of oligonucleotides (such as deoxyribonucleotides, ribonucleotides, peptide nucleic acids, and modified oligonucleotides) for antisense activity against a specific polynucleotide sequence (Bruice, T.W. et al. (1997) U.S. Patent No. 5,686,242; Bruice, T.W. et al. (2000) U.S. Patent No. 6,022,691).
- oligonucleotides such as deoxyribonucleotides, ribonucleotides, peptide nucleic acids, and modified oligonucleotides
- vectors may be introduced into stem cells taken from the patient and clonally propagated for autologous transplant back into that same patient. Delivery by transfection, by liposome injections, or by polycationic amino polymers may be achieved using methods which are well known in the art. (See, e.g., Goldman, C.K. et al. (1997) Nat. Biotechnol. 15:462-466.)
- any of the therapeutic methods described above may be applied to any subject in need of such therapy, including, for example, mammals such as humans, dogs, cats, cows, horses, rabbits, and monkeys.
- An additional embodiment of the invention relates to the administration of a composition which generally comprises an active ingredient formulated with a pharmaceutically acceptable excipient.
- Excipients may include, for example, sugars, starches, celluloses, gums, and proteins.
- Various formulations are commonly known and are thoroughly discussed in the latest edition of Remington's Pharmaceutical Sciences (Maack Publishing, Easton PA).
- Such compositions may consist of PKIN, antibodies to PKIN, and mimetics, agonists, antagonists, or inhibitors of PKTN.
- compositions utilized in this invention may be administered by any number of routes including, but not limited to, oral, intravenous, intramuscular, intra-arterial, intramedullary, intrathecal, intraventricular, pulmonary, transdermal, subcutaneous, intraperitoneal, intranasal, enteral, topical, sublingual, or rectal means.
- compositions for pulmonary administration may be prepared in liquid or dry powder form. These compositions are generally aerosolized immediately prior to inhalation by the patient.
- small molecules e.g. traditional low molecular weight organic drugs
- aerosol delivery of fast-acting formulations is well-known in the art.
- macromolecules e.g. larger peptides and proteins
- Pulmonary delivery has the advantage of administration without needle injection, and obviates the need for potentially toxic penetration enhancers.
- compositions suitable for use in the invention include compositions wherein the active ingredients are contained in an effective amount to achieve the intended purpose.
- the determination of an effective dose is well within the capability of those skilled in the art.
- compositions may be prepared for direct intracellular delivery of macromolecules comprising PKTN or fragments thereof.
- liposome preparations containing a cell-impermeable macromolecule may promote cell fusion and intracellular delivery of the macromolecule.
- PKJN or a fragment thereof may be joined to a short cationic N- terminal portion from the HIV Tat-1 protein. Fusion proteins thus generated have been found to transduce into the cells of all tissues, including the brain, in a mouse model system (Schwarze, S.R. et al. (1999) Science 285:1569-1572).
- the therapeutically effective dose can be estimated initially either in cell culture assays, e.g., of neoplastic cells, or in animal models such as mice, rats, rabbits, dogs, monkeys, or pigs.
- An animal model may also be used to determine the appropriate concentration range and route of administration. Such information can then be used to determine useful doses and routes for administration in humans.
- a therapeutically effective dose refers to that amount of active ingredient, for example PKTN or fragments thereof, antibodies of PKTN, and agonists, antagonists or inhibitors of PKTN, which ameliorates the symptoms or condition.
- Therapeutic efficacy and toxicity may be determined by standard pharmaceutical procedures in cell cultures or with experimental animals, such as by calculating the ED 50 (the dose therapeutically effective in 50% of the population) or LD 50 (the dose lethal to 50% of the population) statistics.
- the dose ratio of toxic to therapeutic effects is the therapeutic index, which can be expressed as the LD 50 ED 50 ratio.
- Compositions which exhibit large therapeutic indices are preferred.
- the data obtained from cell culture assays and animal studies are used to formulate a range of dosage for human use.
- the dosage contained in such compositions is preferably within a range of circulating concentrations that includes the ED 50 with little or no toxicity. The dosage varies within this range depending upon the dosage form employed, the sensitivity of the patient, and the route of administration.
- Dosage and administration are adjusted to provide sufficient levels of the active moiety or to maintain the desired effect. Factors which may be taken into account include the severity of the disease state, the general health of the subject, the age, weight, and gender of the subject, time and frequency of administration, drug combination(s), reaction sensitivities, and response to therapy. Long-acting compositions may be administered every 3 to 4 days, every week, or biweekly depending on the half-life and clearance rate of the particular formulation. Normal dosage amounts may vary from about 0.1 ⁇ g to 100,000 ⁇ g, up to a total dose of about 1 gram, depending upon the route of administration.
- antibodies which specifically bind PKIN may be used for the diagnosis of disorders characterized by expression of PKIN, or in assays to monitor patients being treated with PKTN or agonists, antagonists, or inhibitors of PKIN.
- Antibodies useful for diagnostic purposes may be prepared in the same manner as described above for therapeutics. Diagnostic assays for PKJJST include methods which utilize the antibody and a label to detect PKIN in human body fluids or in extracts of cells or tissues.
- the antibodies may be used with or without modification, and may be labeled by covalent or non-covalent attachment of a reporter molecule.
- a wide variety of reporter molecules, several of which are described above, are known in the art and may be used.
- PK N A variety of protocols for measuring PK N, including ELISAs, RIAs, and FACS, are known in the art and provide a basis for diagnosing altered or abnormal levels of PKIN expression.
- Normal or standard values for PKIN expression are established by combining body fluids or cell extracts taken from normal mammalian subjects, for example, human subjects, with antibodies to PKIN under conditions suitable for complex formation. The amount of standard complex formation may be quantitated by various methods, such as photometric means. Quantities of PKIN expressed in subject, control, and disease samples from biopsied tissues are compared with the standard values. Deviation between standard and subject values establishes the parameters for diagnosing disease.
- the polynucleotides encoding PKJN may be used for diagnostic purposes.
- the polynucleotides which may be used include oligonucleotide sequences, complementary RNA and DNA molecules, and PNAs.
- the polynucleotides may be used to detect and quantify gene expression in biopsied tissues in which expression of PKTN may be correlated with disease.
- the diagnostic assay may be used to determine absence, presence, and excess expression of PKTN, and to monitor regulation of PKIN levels during therapeutic intervention.
- hybridization with PCR probes which are capable of detecting polynucleotide sequences, including genomic sequences, encoding PKTN or closely related molecules may be used to identify nucleic acid sequences which encode PKTN.
- the specificity of the probe whether it is made from a highly specific region, e.g., the 5' regulatory region, or from a less specific region, e.g., a conserved motif, and the stringency of the hybridization or amplification will determine whether the probe identifies only naturally occurring sequences encoding PKTN, allelic variants, or related sequences.
- Probes may also be used for the detection of related sequences, and may have at least 50% sequence identity to any of the PKTN encoding sequences.
- the hybridization probes of the subject invention may be DNA or RNA and may be derived from the sequence of SEQ ID NO: 19-36 or from genomic sequences including promoters, enhancers, and introns of the PKTN gene.
- Means for producing specific hybridization probes for DNAs encoding PKIN include the cloning of polynucleotide sequences encoding PKIN or PKTN derivatives into vectors for the production of mRNA probes.
- Hybridization probes may be labeled by a variety of reporter groups, for example, by radionuclides such as 32 P or 35 S, or by enzymatic labels, such as alkaline phosphatase coupled to the probe via avidin/biotin coupling systems, and the like.
- Polynucleotide sequences encoding PKTN may be used for the diagnosis of disorders associated with expression of PKTN.
- disorders include, but are not limited to, a cancer, such as adenocarcinoma, leukemia, lymphoma, melanoma, myeloma, sarcoma, teratocarcinoma, and, in particular, cancers of the adrenal gland, bladder, bone, bone marrow, brain, breast, cervix, gall bladder, ganglia, gastrointestinal tract, heart, kidney, liver, lung, muscle, ovary, pancreas, parathyroid, penis, prostate, salivary glands, skin, spleen, testis, thymus, thyroid, and uterus, leukemias such as multiple myeloma and lymphomas such as Hodgkin's disease; an immune disorder, such as acquired immunodeficiency syndrome (AIDS), Addison's disease, adult respiratory distress syndrome, allergies, ankylosing s
- the polynucleotide sequences encoding PKTN may be used in Southern or northern analysis, dot blot, or other membrane-based technologies; in PCR technologies; in dipstick, pin, and multiformat ELISA-like assays; and in microarrays utilizing fluids or tissues from patients to detect altered PKTN expression. Such qualitative or quantitative methods are well known in the art.
- the nucleotide sequences encoding PKIN may be useful in assays that detect the presence of associated disorders, particularly those mentioned above.
- the nucleotide sequences encoding PKTN may be labeled by standard methods and added to a fluid or tissue sample from a patient under conditions suitable for the formation of hybridization complexes. After a suitable incubation period, the sample is washed and the signal is quantified and compared with a standard value. If the amount of signal in the patient sample is significantly altered in comparison to a control sample then the presence of altered levels of nucleotide sequences encoding PKTN in the sample indicates the presence of the associated disorder.
- Such assays may also be used to evaluate the efficacy of a particular therapeutic treatment regimen in animal studies, in clinical trials, or to monitor the treatment of an individual patient.
- a normal or standard profile for expression is established. This may be accomplished by combining body fluids or cell extracts taken from normal subjects, either animal or human, with a sequence, or a fragment thereof, encoding PKTN, under conditions suitable for hybridization or amplification. Standard hybridization may be quantified by comparing the values obtained from normal subjects with values from an experiment in which a known amount of a substantially purified polynucleotide is used.
- Standard values obtained in this manner may be compared with values obtained from samples from patients who are symptomatic for a disorder. Deviation from standard values is used to establish the presence of a disorder. Once the presence of a disorder is established and a treatment protocol is initiated, hybridization assays may be repeated on a regular basis to determine if the level of expression in the patient begins to approximate that which is observed in the normal subject. The results obtained from successive assays may be used to show the efficacy of treatment over a period ranging from several days to months.
- the presence of an abnormal amount of transcript (either under- or overexpressed) in biopsied tissue from an individual may indicate a predisposition for the development of the disease, or may provide a means for detecting the disease prior to the appearance of actual clinical symptoms.
- a more definitive diagnosis of this type may allow health professionals to employ preventative measures or aggressive treatment earlier thereby preventing the development or further progression of the cancer.
- oligonucleotides designed from the sequences encoding PKTN may involve the use of PCR. These oligomers may be chemically synthesized, generated enzymatically, or produced in vitro. Oligomers will preferably contain a fragment of a polynucleotide encoding PKIN, or a fragment of a polynucleotide complementary to the polynucleotide encoding PKIN, and will be employed under optimized conditions for identification of a specific gene or condition. Oligomers may also be employed under less stringent conditions for detection or quantification of closely related DNA or RNA sequences.
- oligonucleotide primers derived from the polynucleotide sequences encoding PKTN may be used to detect single nucleotide polymorphisms (SNPs).
- SNPs are substitutions, insertions and deletions that are a frequent cause of inherited or acquired genetic disease in humans.
- Methods of SNP detection include, but are not limited to, single-stranded conformation polymorphism (SSCP) and fluorescent SSCP (fSSCP) methods.
- SSCP single-stranded conformation polymorphism
- fSSCP fluorescent SSCP
- oligonucleotide primers derived from the polynucleotide sequences encoding PKIN are used to amplify DNA using the polymerase chain reaction (PCR).
- the DNA may be derived, for example, from diseased or normal tissue, biopsy samples, bodily fluids, and the like.
- SNPs in the DNA cause differences in the secondary and tertiary structures of PCR products in single-stranded form, and these differences are detectable using gel electrophoresis in non-denaturing gels.
- the oligonucleotide primers are fluorescently labeled, which allows detection of the amplimers in high- throughput equipment such as DNA sequencing machines.
- sequence database analysis methods termed in silico SNP (isSNP) are capable of identifying polymorphisms by comparing the sequence of individual overlapping DNA fragments which assemble into a common consensus sequence.
- SNPs may be detected and characterized by mass spectrometry using, for example, the high throughput MASSARRAY system (Sequenom, Inc., San Diego CA).
- Methods which may also be used to quantify the expression of PKIN include radiolabeling or biotinylating nucleotides, coamplification of a control nucleic acid, and interpolating results from standard curves.
- radiolabeling or biotinylating nucleotides See, e.g., Melby, P.C. et al. (1993) J. Immunol. Methods 159:235-244; Duplaa, C. et al. (1993) Anal. Biochem.
- the speed of quantitation of multiple samples may be accelerated by running the assay in a high-throughput format where the oligomer or polynucleotide of interest is presented in various dilutions and a spectrophotometric or colorimetric response gives rapid quantitation.
- oligonucleotides or longer fragments derived from any of the polynucleotide sequences described herein may be used as elements on a microarray.
- the microarray can be used in transcript imaging techniques which monitor the relative expression levels of large numbers of genes simultaneously as described below.
- the microarray may also be used to identify genetic variants, mutations, and polymorphisms. This information may be used to determine gene function, to understand the genetic basis of a disorder, to diagnose a disorder, to monitor progression/regression of disease as a function of gene expression, and to develop and monitor the activities of therapeutic agents in the treatment of disease.
- this information may be used to develop a pharmacogenomic profile of a patient in order to select the most appropriate and effective treatment regimen for that patient.
- therapeutic agents which are highly effective and display the fewest side effects may be selected for a patient based on his/her pharmacogenomic profile.
- PKTN, fragments of PKTN, or antibodies specific for PKTN may be used as elements on a microarray.
- the microarray may be used to monitor or measure protein-protein interactions, drug-target interactions, and gene expression profiles, as described above.
- a particular embodiment relates to the use of the polynucleotides of the present invention to generate a transcript image of a tissue or cell type.
- a transcript image represents the global pattern of gene expression by a particular tissue or cell type. Global gene expression patterns are analyzed by quantifying the number of expressed genes and their relative abundance under given conditions and at a given time. (See Seilhamer et al., "Comparative Gene Transcript Analysis," U.S. Patent Number 5,840,484, expressly incorporated by reference herein.)
- a transcript image may be generated by hybridizing the polynucleotides of the present invention or their complements to the totality of transcripts or reverse transcripts of a particular tissue or cell type.
- the hybridization takes place in high-throughput format, wherein the polynucleotides of the present invention or their complements comprise a subset of a plurality of elements on a microarray.
- the resultant transcript image would provide a profile of gene activity.
- Transcript images may be generated using transcripts isolated from tissues, cell lines, biopsies, or other biological samples.
- the transcript image may thus reflect gene expression in vivo, as in the case of a tissue or biopsy sample, or in vitro, as in the case of a cell line.
- Transcript images which profile the expression of the polynucleotides of the present invention may also be used in conjunction with in vitro model systems and preclinical evaluation of pharmaceuticals, as well as toxicological testing of industrial and naturally-occurring environmental compounds. All compounds induce characteristic gene expression patterns, frequently termed molecular fingerprints or toxicant signatures, which are indicative of mechanisms of action and toxicity (Nuwaysir, E.F. et al. (1999) Mol. Carcinog. 24:153-159; Steiner, S. and N.L. Anderson (2000) Toxicol. Lett. 112-113:467-471, expressly incorporated by reference herein). If a test compound has a signature similar to that of a compound with known toxicity, it is likely to share those toxic properties.
- the toxicity of a test compound is assessed by treating a biological sample containing nucleic acids with the test compound.
- Nucleic acids that are expressed in the treated biological sample are hybridized with one or more probes specific to the polynucleotides of the present invention, so that transcript levels corresponding to the polynucleotides of the present invention may be quantified.
- the transcript levels in the treated biological sample are compared with levels in an untreated biological sample. Differences in the transcript levels between the two samples are indicative of a toxic response caused by the test compound in the treated sample.
- proteome refers to the global pattern of protein expression in a particular tissue or cell type.
- proteome expression patterns, or profiles are analyzed by quantifying the number of expressed proteins and their relative abundance under given conditions and at a given time.
- a profile of a cell's proteome may thus be generated by separating and analyzing the polypeptides of a particular tissue or cell type.
- the separation is achieved using two-dimensional gel electrophoresis, in which proteins from a sample are separated by isoelectric focusing in the first dimension, and then according to molecular weight by sodium dodecyl sulfate slab gel electrophoresis in the second dimension (Steiner and Anderson, supra).
- the proteins are visualized in the gel as discrete and uniquely positioned spots, typically by staining the gel with an agent such as Coomassie Blue or silver or fluorescent stains.
- the optical density of each protein spot is generally proportional to the level of the protein in the sample.
- the optical densities of equivalently positioned protein spots from different samples for example, from biological samples either treated or untreated with a test compound or therapeutic agent, are compared to identify any changes in protein spot density related to the treatment.
- the proteins in the spots are partially sequenced using, for example, standard methods employing chemical or enzymatic cleavage followed by mass spectrometry.
- the identity of the protein in a spot may be determined by comparing its partial sequence, preferably of at least 5 contiguous amino acid residues, to the polypeptide sequences of the present invention. In some cases, further sequence data may be obtained for definitive protein identification.
- a proteomic profile may also be generated using antibodies specific for PKTN to quantify the levels of PKIN expression. In one embodiment, the antibodies are used as elements on a microarray, and protein expression levels are quantified by exposing the microarray to the sample and detecting the levels of protein bound to each array element (Lueking, A. et al. (1999) Anal. Biochem.
- Detection may be performed by a variety of methods known in the art, for example, by reacting the proteins in the sample with a thiol- or amino-reactive fluorescent compound and detecting the amount of fluorescence bound at each array element.
- Toxicant signatures at the proteome level are also useful for toxicological screening, and should be analyzed in parallel with toxicant signatures at the transcript level.
- There is a poor correlation between transcript and protein abundances for some proteins in some tissues (Anderson, N.L. and J. Seilhamer (1997) Electrophoresis 18:533-537), so proteome toxicant signatures may be useful in the analysis of compounds which do not significantly affect the transcript image, but which alter the proteomic profile.
- the analysis of transcripts in body fluids is difficult, due to rapid degradation of mRNA, so proteomic profiling may be more reliable and informative in such cases.
- the toxicity of a test compound is assessed by treating a biological sample containing proteins with the test compound. Proteins that are expressed in the treated biological sample are separated so that the amount of each protein can be quantified. The amount of each protein is compared to the amount of the corresponding protein in an untreated biological sample. A difference in the amount of protein between the two samples is indicative of a toxic response to the test compound in the treated sample. Individual proteins are identified by sequencing the amino acid residues of the individual proteins and comparing these partial sequences to the polypeptides of the present invention.
- the toxicity of a test compound is assessed by treating a biological sample containing proteins with the test compound. Proteins from the biological sample are incubated with antibodies specific to the polypeptides of the present invention. The amount of protein recognized by the antibodies is quantified. The amount of protein in the treated biological sample is compared with the amount in an untreated biological sample. A difference in the amount of protein between the two samples is indicative of a toxic response to the test compound in the treated sample.
- Microarrays may be prepared, used, and analyzed using methods known in the art.
- methods known in the art See, e.g., Brennan, T.M. et al. (1995) U.S. Patent No. 5,474,796; Schena, M. et al. (1996) Proc. Natl. Acad. Sci. USA 93:10614-10619; Baldeschweiler et al. (1995) PCT application WO95/251116; Shalon, D. et al. (1995) PCT application WO95/35505; Heller, R.A. et al. (1997) Proc. Natl. Acad. Sci. USA 94:2150- 2155; and Heller, M J. et al.
- nucleic acid sequences encoding PKTN may be used to generate hybridization probes useful in mapping the naturally occurring genomic sequence. Either coding or noncoding sequences may be used, and in some instances, noncoding sequences may be preferable over coding sequences. For example, conservation of a coding sequence among members of a multi-gene family may potentially cause undesired cross hybridization during chromosomal mapping.
- sequences may be mapped to a particular chromosome, to a specific region of a chromosome, or to artificial chromosome constructions, e.g., human artificial chromosomes (HACs), yeast artificial chromosomes (YACs), bacterial artificial chromosomes (BACs), bacterial PI constructions, or single chromosome cDNA libraries.
- HACs human artificial chromosomes
- YACs yeast artificial chromosomes
- BACs bacterial artificial chromosomes
- PI constructions or single chromosome cDNA libraries.
- the nucleic acid sequences of the invention may be used to develop genetic linkage maps, for example, which correlate the inheritance of a disease state with the inheritance of a particular chromosome region or restriction fragment length polymorphism (RFLP).
- RFLP restriction fragment length polymorphism
- FISH Fluorescent in situ hybridization
- Examples of genetic map data can be found in various scientific journals or at the Online Mendelian Inheritance in Man (OMIM) World Wide Web site. Correlation between the location of the gene encoding PKIN on a physical map and a specific disorder, or a predisposition to a specific disorder, may help define the region of DNA associated with that disorder and thus may further positional cloning efforts.
- OMIM Online Mendelian Inheritance in Man
- In situ hybridization of chromosomal preparations and physical mapping techniques may be used for extending genetic maps. Often the placement of a gene on the chromosome of another mammalian species, such as mouse, may reveal associated markers even if the exact chromosomal locus is not known. This information is valuable to investigators searching for disease genes using positional cloning or other gene discovery techniques. Once the gene or genes responsible for a disease or syndrome have been crudely localized by genetic linkage to a particular genomic region, e.g., ataxia-telangiectasia to 1 lq22-23, any sequences mapping to that area may represent associated or regulatory genes for further investigation.
- nucleotide sequence of the instant invention may also be used to detect differences in the chromosomal location due to translocation, inversion, etc., among normal, carrier, or affected individuals.
- PKTN in another embodiment, PKTN, its catalytic or immunogenic fragments, or oligopeptides thereof can be used for screening libraries of compounds in any of a variety of drug screening techniques.
- the fragment employed in such screening may be free in solution, affixed to a solid support, borne on a cell surface, or located intracellularly. The formation of binding complexes between PKIN and the agent being tested may be measured.
- Another technique for drug screening provides for high throughput screening of compounds having suitable binding affinity to the protein of interest.
- This method large numbers of different small test compounds are synthesized on a solid substrate. The test compounds are reacted with PKJN, or fragments thereof, and washed. Bound PKTN is then detected by methods well known in the art. Purified PKIN can also be coated directly onto plates for use in the aforementioned drug screening techniques. Alternatively, non-neutralizing antibodies can be used to capture the peptide and immobilize it on a solid support.
- the nucleotide sequences which encode PKIN may be used in any molecular biology techniques that have yet to be developed, provided the new techniques rely on properties of nucleotide sequences that are currently known, including, but not limited to, such properties as the triplet genetic code and specific base pair interactions.
- Incyte cDNAs were derived from cDNA libraries described in the LJFESEQ GOLD database (Incyte Genomics, Palo Alto CA) and shown in Table 4, column 5. Some tissues were homogenized and lysed in guanidinium isothiocyanate, while others were homogenized and lysed in phenol or in a suitable mixture of denaturants, such as TRIZOL (Life Technologies), a monophasic solution of phenol and guanidine isothiocyanate. The resulting lysates were centrifuged over CsCl cushions or extracted with chloroform. RNA was precipitated from the lysates with either isopropanol or sodium acetate and ethanol, or by other routine methods.
- poly(A)+ RNA was isolated using oligo d(T)-coupled paramagnetic particles (Promega), OLIGOTEX latex particles (QIAGEN, Chatsworth CA), or an OLIGOTEX mRNA purification kit (QIAGEN).
- RNA was provided with RNA and constructed the corresponding cDNA libraries.
- cDNA was synthesized and cDNA libraries were constructed with the UNIZAP vector system (Stratagene) or SUPERSCRIPT plasmid system (Life Technologies), using the recommended procedures or similar methods known in the art. (See, e.g., Ausubel, 1997, supra, units 5.1-6.6.) Reverse transcription was initiated using oligo d(T) or random primers. Synthetic oligonucleotide adapters were ligated to double stranded cDNA, and the cDNA was digested with the appropriate restriction enzyme or enzymes.
- cDNA was size-selected (300- 1000 bp) using SEPHACRYL S1000, SEPHAROSE CL2B, or SEPHAROSE CL4B column chromatography (Amersham Pharmacia Biotech) or preparative agarose gel electrophoresis.
- cDNAs were ligated into compatible restriction enzyme sites of the polylinker of a suitable plasmid, e.g., PBLUESCRIPT plasmid (Stratagene), PSPORT1 plasmid (Life Technologies), PCDNA2.1 plasmid (Invitrogen, Carlsbad CA), PBK-CMV plasmid (Stratagene), or pTNCY (Incyte Genomics, Palo Alto CA), or derivatives thereof.
- PBLUESCRIPT plasmid (Stratagene)
- PSPORT1 plasmid (Life Technologies)
- PCDNA2.1 plasmid Invitrogen, Carlsbad CA
- PBK-CMV plasmid (Stratagene)
- Recombinant plasmids were transformed into competent E. coli cells including XLl-Blue, XLl-BlueMRF, or SOLR from Stratagene or DH5 ⁇ , DH10B, or ElectroMAX DH10B from Life Technologies.
- Plasmids obtained as described in Example I were recovered from host cells by in vivo excision using the UNIZAP vector system (Stratagene) or by cell lysis. Plasmids were purified using at least one of the following: a Magic or WIZARD Minipreps DNA purification system (Promega); an AGTC Miniprep purification kit (Edge Biosystems, Gaithersburg MD); and QJAWELL 8 Plasmid, QJAWELL 8 Plus Plasmid, QJAWELL 8 Ultra Plasmid purification systems or the R.E.A.L. PREP 96 plasmid purification kit from QIAGEN.
- a Magic or WIZARD Minipreps DNA purification system Promega
- an AGTC Miniprep purification kit Edge Biosystems, Gaithersburg MD
- Plasmids were resuspended in 0.1 ml of distilled water and stored, with or without lyophilization, at 4°C.
- plasmid DNA was amplified from host cell lysates using direct link PCR in a high-throughput format (Rao, V.B. (1994) Anal. Biochem. 216:1-14). Host cell lysis and thermal cycling steps were carried out in a single reaction mixture.
- Incyte cDNA recovered in plasmids as described in Example II were sequenced as follows. Sequencing reactions were processed using standard methods or high-throughput instrumentation such as the ABI CATALYST 800 (Applied Biosystems) thermal cycler or the PTC-200 thermal cycler (MJ Research) in conjunction with the HYDRA microdispenser (Robbins Scientific) or the MICROLAB 2200 (Hamilton) liquid transfer system. cDNA sequencing reactions were prepared using reagents provided by Amersham Pharmacia Biotech or supplied in ABI sequencing kits such as the ABI PRISM BIGDYE Terminator cycle sequencing ready reaction kit (Applied Biosystems).
- Electrophoretic separation of cDNA sequencing reactions and detection of labeled polynucleotides were carried out using the MEGABACE 1000 DNA sequencing system (Molecular Dynamics); the ABI PRISM 373 or 377 sequencing system (Applied Biosystems) in conjunction with standard ABI protocols and base calling software; or other sequence analysis systems known in the art. Reading frames within the cDNA sequences were identified using standard methods (reviewed in Ausubel, 1997, supra, unit 7.7). Some of the cDNA sequences were selected for extension using the techniques disclosed in Example VHI.
- the polynucleotide sequences derived from Incyte cDNAs were validated by removing vector, linker, and poly(A) sequences and by masking ambiguous bases, using algorithms and programs based on BLAST, dynamic programming, and dinucleotide nearest neighbor analysis.
- the Incyte cDNA sequences or translations thereof were then queried against a selection of public databases such as the GenBank primate; rodent, mammalian, vertebrate, and eukaryote databases, and BLOCKS, PRINTS, DOMO, PRODOM, and hidden Markov model (HMM)-based protein family databases such as PFAM.
- HMM hidden Markov model
- Incyte cDNA sequences were assembled to produce full length polynucleotide sequences.
- GenBank cDNAs, GenBank ESTs, stitched sequences, stretched sequences, or Genscan-predicted coding sequences were used to extend Incyte cD ⁇ A assemblages to full length.
- Full length polynucleotide sequences are also analyzed using MACDNASIS PRO software (Hitachi Software Engineering, South San Francisco CA) and LASERGENE software (DNASTAR). Polynucleotide and polypeptide sequence alignments are generated using default parameters specified by the CLUSTAL algorithm as incorporated into the MEGALIGN multisequence alignment program (DNASTAR), which also calculates the percent identity between aligned sequences. Table 7 summarizes the tools, programs, and algorithms used for the analysis and assembly of Incyte cDNA and full length sequences and provides applicable descriptions, references, and threshold parameters.
- the first column of Table 7 shows the tools, programs, and algorithms used, the second column provides brief descriptions thereof, the third column presents appropriate references, all of which are incorporated by reference herein in their entirety, and the fourth column presents, where applicable, the scores, probability values, and other parameters used to evaluate the strength of a match between two sequences (the higher the score or the lower the probability value, the greater the identity between two sequences).
- Genscan is a general- purpose gene identification program which analyzes genomic DNA sequences from a variety of organisms (See Burge, C. and S. Karlin (1997) J. Mol. Biol. 268:78-94, and Burge, C. and S. Karlin (1998) Curr. Opin. Struct. Biol. 8:346-354).
- the program concatenates predicted exons to form an assembled cDNA sequence extending from a methionine to a stop codon.
- the output of Genscan is a FASTA database of polynucleotide and polypeptide sequences.
- Genscan The maximum range of sequence for Genscan to analyze at once was set to 30 kb.
- the encoded polypeptides were analyzed by querying against PFAM models for kinases. Potential human kinases were also identified by homology to Incyte cDNA sequences that had been annotated as kinases.
- Genscan-predicted sequences were then compared by BLAST analysis to the genpept and gbpri public databases. Where necessary, the Genscan-predicted sequences were then edited by comparison to the top BLAST hit from genpept to correct errors in the sequence predicted by Genscan, such as extra or omitted exons.
- Partial cDNA sequences were extended with exons predicted by the Genscan gene identification program described in Example TV. Partial cDNAs assembled as described in Example HJ were mapped to genomic DNA and parsed into clusters containing related cDNAs and Genscan exon predictions from one or more genomic sequences. Each cluster was analyzed using an algorithm based on graph theory and dynamic programming to integrate cDNA and genomic information, generating possible splice variants that were subsequently confirmed, edited, or extended to create a full length sequence. Sequence intervals in which the entire length of the interval was present on more than one sequence in the cluster were identified, and intervals thus identified were considered to be equivalent by transitivity.
- Partial DNA sequences were extended to full length with an algorithm based on BLAST analysis.
- GenBank primate a GenBank primate
- rodent a rodent
- mammalian a mammalian
- vertebrate eukaryote databases
- eukaryote databases using the BLAST program.
- GenBank protein homolog was then compared by BLAST analysis to either Incyte cDNA sequences or GenScan exon predicted sequences described in Example IV.
- a chimeric protein was generated by using the resultant high-scoring segment pairs (HSPs) to map the translated sequences onto the GenBank protein homolog. Insertions or deletions may occur in the chimeric protein with respect to the original GenBank protein homolog.
- HSPs high-scoring segment
- GenBank protein homolog The GenBank protein homolog, the chimeric protein, or both were used as probes to search for homologous genomic sequences from the public human genome databases. Partial DNA sequences were therefore "stretched” or extended by the addition of homologous genomic sequences. The resultant stretched sequences were examined to determine whether it contained a complete gene. VI. Chromosomal Mapping of PKIN Encoding Polynucleotides The sequences which were used to assemble SEQ ID NO: 19-36 were compared with sequences from the Incyte LIFESEQ database and public domain databases using BLAST and other implementations of the Smith- Waterman algorithm.
- SHGC Stanford Human Genome Center
- WIGR Whitehead Institute for Genome Research
- Genethon Genethon were used to determine if any of the clustered sequences had been previously mapped. Inclusion of a mapped sequence in a cluster resulted in the assignment of all sequences of that cluster, including its particular SEQ ID NO:, to that map location.
- Map locations are represented by ranges, or intervals, of human chromosomes.
- the map position of an interval, in centiMorgans, is measured relative to the terminus of the chromosome's p- arm.
- centiMorgan cM
- centiMorgan is a unit of measurement based on recombination frequencies between chromosomal markers. On average, 1 cM is roughly equivalent to 1 megabase (Mb) of DNA in humans, although this can vary widely due to hot and cold spots of recombination.
- the cM distances are based on genetic markers mapped by Genethon which provide boundaries for radiation hybrid markers whose sequences were included in each of the clusters.
- SEQ ID NO:24 was mapped to chromosome 2 within the interval from 92.30 to 103.1 centiMorgans
- SEQ ID NO:25 was mapped to chromosome 11 within the interval from 104.8 to 117.9 centiMorgans
- SEQ ID NO:33 was mapped to chromosome 8 within the interval from 25.8 to 40.3 centiMorgans
- SEQ ID NO:23 was mapped to chromosome 9 within the interval from 101.20 to 104.90 centiMorgans, to chromosome 10 within the interval from 145.20 to 156.60 centiMorgans, and to chromosome 19 within the interval from 69.90 to 81.20 centiMorgans.
- Northern analysis is a laboratory technique used to detect the presence of a transcript of a gene and involves the hybridization of a labeled nucleotide sequence to a membrane on which RNAs from a particular cell type or tissue have been bound. (See, e.g., Sambrook, supra, ch. 7; Ausubel (1995) supra, ch. 4 and 16.)
- the product score takes into account both the degree of similarity between two sequences and the length of the sequence match.
- the product score is a normalized value between 0 and 100, and is calculated as follows: the BLAST score is multiplied by the percent nucleotide identity and the product is divided by (5 times the length of the shorter of the two sequences).
- the BLAST score is calculated by assigning a score of +5 for every base that matches in a high-scoring segment pair (HSP), and -4 for every mismatch. Two sequences may share more than one HSP (separated by gaps). If there is more than one HSP, then the pair with the highest BLAST score is used to calculate the product score.
- the product score represents a balance between fractional overlap and quality in a BLAST alignment.
- a product score of 100 is produced only for 100% identity over the entire length of the shorter of the two sequences being compared.
- a product score of 70 is produced either by 100% identity and 70% overlap at one end, or by 88% identity and 100% overlap at the other.
- a product score of 50 is produced either by 100% identity and 50% overlap at one end, or 79% identity and 100% overlap.
- polynucleotide sequences encoding PKJN are analyzed with respect to the tissue sources from which they were derived. For example, some full length sequences are assembled, at least in part, with overlapping incyte cDNA sequences (see Example Ifl). Each cDNA sequence is derived from a cDNA library constructed from a human tissue.
- Each human tissue is classified into one of the following organ/tissue categories: cardiovascular system; connective tissue; digestive system; embryonic structures; endocrine system; exocrine glands; genitalia, female; genitalia, male; germ cells; hemic and immune system; liver; musculoskeletal system; nervous system; pancreas; respiratory system; sense organs; skin; stomatognathic system; unclassified/mixed; or urinary tract.
- the number of libraries in each category is counted and divided by the total number of libraries across all categories.
- each human tissue is classified into one of the following disease/condition categories: cancer, cell line, developmental, inflammation, neurological, trauma, cardiovascular, pooled, and other, and the number of libraries in each category is counted and divided by the total number of libraries across all categories. The resulting percentages reflect the tissue- and disease-specific expression of cDNA encoding PKTN.
- cDNA sequences and cDNA library/tissue information are found in the LIFESEQ GOLD database (Incyte Genomics, Palo Alto CA). VIII. Extension of PKIN Encoding Polynucleotides
- Full length polynucleotide sequences were also produced by extension of an appropriate fragment of the full length molecule using oligonucleotide primers designed from this fragment.
- One primer was synthesized to initiate 5' extension of the known fragment, and the other primer was synthesized to initiate 3' extension of the known fragment.
- the initial primers were designed using OLIGO 4.06 software (National Biosciences), or another appropriate program, to be about 22 to 30 nucleotides in length, to have a GC content of about 50% or more, and to anneal to the target sequence at temperatures of about 68 °C to about 72 C C Any stretch of nucleotides which would result in hairpin structures and primer-primer dimerizations was avoided.
- Selected human cDNA libraries were used to extend the sequence. If more than one extension was necessary or desired, additional or- nested sets of primers were designed.
- PCR was performed in 96-well plates using the PTC-200 thermal cycler (MJ Research, Inc.).
- the reaction mix contained DNA template, 200 nmol of each primer, reaction buffer containing Mg 2"1" , (NH 4 ) 2 S0 4 , and 2-mercaptoethanol, Taq DNA polymerase (Amersham Pharmacia Biotech), ELONGASE enzyme (Life Technologies), and Pfu DNA polymerase (Stratagene), with the following parameters for primer pair PCI A and PCI B: Step 1: 94°C, 3 min; Step 2: 94°C, 15 sec; Step 3: 60°C, 1 min; Step 4: 68°C, 2 min; Step 5: Steps 2, 3, and 4 repeated 20 times; Step 6: 68°C, 5 min; Step 7: storage at 4°C.
- the parameters for primer pair T7 and SK+ were as follows: Step 1: 94 °C, 3 min; Step 2: 94°C, 15 sec; Step 3: 57°C, 1 min; Step 4: 68°C, 2 min; Step 5: Steps 2, 3, and 4 repeated 20 times; Step 6: 68°C, 5 min; Step 7: storage at 4°C.
- the concentration of DNA in each well was determined by dispensing 100 ⁇ l PICOGREEN quantitation reagent (0.25% (v/v) PICOGREEN; Molecular Probes, Eugene OR) dissolved in IX TE and 0.5 ⁇ l of undiluted PCR product into each well of an opaque fluorimeter plate (Corning Costar, Acton MA), allowing the DNA to bind to the reagent.
- the plate was scanned in a Fluoroskan II (Labsystems Oy, Helsinki, Finland) to measure the fluorescence of the sample and to quantify the concentration of DNA.
- a 5 ⁇ l to 10 ⁇ l aliquot of the reaction mixture was analyzed by electrophoresis on a 1 % agarose gel to determine which reactions were successful in extending the sequence.
- the extended nucleotides were desalted and concentrated, transferred to 384- well plates, digested with CviJI cholera virus endonuclease (Molecular Biology Research, Madison WI), and sonicated or sheared prior to religation into pUC 18 vector (Amersham Pharmacia Biotech).
- CviJI cholera virus endonuclease Molecular Biology Research, Madison WI
- sonicated or sheared prior to religation into pUC 18 vector
- the digested nucleotides were separated on low concentration (0.6 to 0.8%) agarose gels, fragments were excised, and agar digested with Agar ACE (Promega).
- Extended clones were religated using T4 ligase (New England Biolabs, Beverly MA) into pUC 18 vector (Amersham Pharmacia Biotech), treated with Pfu DNA polymerase (Stratagene) to fill-in restriction site overhangs, and transfected into competent E. coli cells. Transformed cells were selected on antibiotic-containing media, and individual colonies were picked and cultured overnight at 37 °C in 384-well plates in LB/2x carb liquid media. The cells were lysed, and DNA was amplified by PCR using Taq DNA polymerase
- Step 1 94°C, 3 min
- Step 2 94°C, 15 sec
- Step 3 60°C, 1 min
- Step 4 72°C, 2 min
- Step 5 steps 2, 3, and 4 repeated 29 times
- Step 6 72°C, 5 min
- Step 7 storage at 4°C.
- DNA was quantified by PICOGREEN reagent (Molecular Probes) as described above. Samples with low DNA recoveries were reamplified using the same conditions as described above.
- Hybridization probes derived from SEQ JD NO: 19-36 are employed to screen cDNAs, genomic DNAs, or mRNAs. Although the labeling of oligonucleotides, consisting of about 20 base pairs, is specifically described, essentially the same procedure is used with larger nucleotide fragments. Oligonucleotides are designed using state-of-the-art software such as OLIGO 4.06 software (National Biosciences) and labeled by combining 50 pmol of each oligomer, 250 ⁇ Ci of [ ⁇ - 32 P] adenosine triphosphate (Amersham Pharmacia Biotech), and T4 polynucleotide kinase (DuPont NEN, Boston MA).
- the labeled oligonucleotides are substantially purified using a SEPHADEX G-25 superfine size exclusion dextran bead column (Amersham Pharmacia Biotech). An aliquot containing 10 7 counts per minute of the labeled probe is used in a typical membrane-based hybridization analysis of human genomic DNA digested with one of the following endonucleases: Ase I, Bgl E, Eco RI, Pst I, Xba I, or Pvu H (DuPont NEN).
- the DNA from each digest is fractionated on a 0.7% agarose gel and transferred to nylon membranes (Nytran Plus, Schleicher & Schuell, Durham NH). Hybridization is carried out for 16 hours at 40°C To remove nonspecific signals, blots are sequentially washed at room temperature under conditions of up to, for example, 0.1 x saline sodium citrate and 0.5% sodium dodecyl sulfate. Hybridization patterns are visualized using autoradiography or an alternative imaging means and compared. X.
- Microarrays The linkage or synthesis of array elements upon a microarray can be achieved utilizing photolithography, piezoelectric printing (ink-jet printing, See, e.g., Baldeschweiler, supra.), mechanical microspotting technologies, and derivatives thereof.
- the substrate in each of the aforementioned technologies should be uniform and solid with a non-porous surface (Schena (1999), supra). Suggested substrates include silicon, silica, glass slides, glass chips, and silicon wafers.
- a procedure analogous to a dot or slot blot may also be used to arrange and link elements to the surface of a substrate using thermal, UV, chemical, or mechanical bonding procedures.
- a typical array may be produced using available methods and machines well known to those of ordinary skill in the art and may contain any appropriate number of elements. (See, e.g., Schena, M. et al. (1995) Science 270:467-470; Shalon, D. et al. (1996) Genome Res. 6:639-645; Marshall, A. and J. Hodgson (1998) Nat. Biotechnol. 16:27-31.)
- Full length cDNAs, Expressed Sequence Tags (ESTs), or fragments or oligomers thereof may comprise the elements of the microarray. Fragments or oligomers suitable for hybridization can be selected using software well known in the art such as LASERGENE software (DNASTAR).
- the array elements are hybridized with polynucleotides in a biological sample.
- the polynucleotides in the biological sample are conjugated to a fluorescent label or other molecular tag for ease of detection.
- a fluorescence scanner is used to detect hybridization at each array element.
- laser desorbtion and mass spectrometry may be used for detection of hybridization.
- the degree of complementarity and the relative abundance of each polynucleotide which hybridizes to an element on the microarray may be assessed.
- microarray preparation and usage is described in detail below.
- Total RNA is isolated from tissue samples using the guanidinium thiocyanate method and poly(A) + RNA is purified using the oligo-(dT) cellulose method.
- Each poly(A) + RNA sample is reverse transcribed using MMLV reverse-transcriptase, 0.05 pg/ ⁇ l oligo-(dT) primer (21mer), IX first strand buffer, 0.03 units/ ⁇ l RNase inhibitor, 500 ⁇ M dATP, 500 ⁇ M dGTP, 500 ⁇ M dTTP, 40 ⁇ M dCTP, 40 ⁇ M dCTP-Cy3 (BDS) or dCTP-Cy5 (Amersham Pharmacia Biotech).
- the reverse transcription reaction is performed in a 25 ml volume containing 200 ng poly(A) + RNA with GEMBRIGHT kits (Incyte).
- Specific control poly(A) + RNAs are synthesized by in vitro transcription from non-coding yeast genomic DNA. After incubation at 37 °C for 2 hr, each reaction sample (one with Cy3 and another with Cy5 labeling) is treated with 2.5 ml of 0.5M sodium hydroxide and incubated for 20 minutes at 85 °C to the stop the reaction and degrade the RNA. Samples are purified using two successive CHROMA SPIN 30 gel filtration spin columns (CLONTECH Laboratories, Inc.
- Sequences of the present invention are used to generate array elements.
- Each array element is amplified from bacterial cells containing vectors with cloned cDNA inserts.
- PCR amplification uses primers complementary to the vector sequences flanking the cDNA insert.
- Array elements are amplified in thirty cycles of PCR from an initial quantity of 1-2 ng to a final quantity greater than 5 ⁇ g. Amplified array elements are then purified using SEPHACRYL-400 (Amersham Pharmacia Biotech).
- Purified array elements are immobilized on polymer-coated glass slides.
- Glass microscope slides (Corning) are cleaned by ultrasound in 0.1% SDS and acetone, with extensive distilled water washes between and after treatments.
- Glass slides are etched in 4% hydrofluoric acid (VWR Scientific Products Corporation (VWR), West Chester PA), washed extensively in distilled water, and coated with 0.05% aminopropyl silane (Sigma) in 95% ethanol. Coated slides are cured in a 110°C oven.
- Array elements are applied to the coated glass substrate using a procedure described in US Patent No. 5,807,522, incorporated herein by reference.
- 1 ⁇ l of the array element DNA, at an average concentration of 100 ng/ ⁇ l, is loaded into the open capillary printing element by a high-speed robotic apparatus.
- the apparatus then deposits about 5 nl of array element sample per slide.
- Microarrays are UV-crosslinked using a STRATALINKER UV-crosslinker (Stratagene). Microarrays are washed at room temperature once in 0.2% SDS and three times in distilled water. Non-specific binding sites are blocked by incubation of microarrays in 0.2% casein in phosphate buffered saline (PBS) (Tropix, Inc., Bedford MA) for 30 minutes at 60° C followed by washes in 0.2% SDS and distilled water as before. Hybridization
- Hybridization reactions contain 9 ⁇ l of sample mixture consisting of 0.2 ⁇ g each of Cy3 and Cy5 labeled cDNA synthesis products in 5X SSC, 0.2% SDS hybridization buffer.
- the sample mixture is heated to 65° C for 5 minutes and is aliquoted onto the microarray surface and covered with an 1.8 cm 2 coverslip.
- the arrays are transferred to a waterproof chamber having a cavity just slightly larger than a microscope slide.
- the chamber is kept at 100% humidity internally by the addition of 140 ⁇ l of 5X SSC in a corner of the chamber.
- the chamber containing the arrays is incubated for about 6.5 hours at 60° C.
- the arrays are washed for 10 min at 45° C in a first wash buffer (IX SSC, 0.1% SDS), three times for 10 minutes each at 45°C in a second wash buffer (0.1X
- Reporter-labeled hybridization complexes are detected with a microscope equipped with an Innova 70 mixed gas 10 W laser (Coherent, Inc., Santa Clara CA) capable of generating spectral lines at 488 nm for excitation of Cy3 and at 632 nm for excitation of Cy5.
- the excitation laser light is focused on the array using a 20X microscope objective (Nikon, Inc., Melville NY).
- the slide containing the array is placed on a computer-controlled X-Y stage on the microscope and raster- scanned past the objective.
- the 1.8 cm x 1.8 cm array used in the present example is scanned with a resolution of 20 micrometers.
- a mixed gas multiline laser excites the two fluorophores sequentially. Emitted light is split, based on wavelength, into two photomultiplier tube detectors (PMT R1477, Hamamatsu Photonics Systems, Bridgewater NJ) corresponding to the two fluorophores. Appropriate filters positioned between the array and the photomultiplier tubes are used to filter the signals.
- the emission maxima of the fluorophores used are 565 nm for Cy3 and 650 nm for Cy5.
- Each array is typically scanned twice, one scan per fluorophore using the appropriate filters at the laser source, although the apparatus is capable of recording the spectra from both fluorophores simultaneously.
- the sensitivity of the scans is typically calibrated using the signal intensity generated by a cDNA control species added to the sample mixture at a known concentration.
- a specific location on the array contains a complementary DNA sequence, allowing the intensity of the signal at that location to be correlated with a weight ratio of hybridizing species of 1:100,000.
- the calibration is done by labeling samples of the calibrating cDNA with the two fluorophores and adding identical amounts of each to the hybridization mixture.
- the output of the photomultiplier tube is digitized using a 12-bit RTI-835H analog-to-digital (A/D) conversion board (Analog Devices, Inc., Norwood MA) installed in an IBM-compatible PC computer.
- the digitized data are displayed as an image where the signal intensity is mapped using a linear 20-color transformation to a pseudocolor scale ranging from blue (low signal) to red (high signal).
- the data is also analyzed quantitatively. Where two different fluorophores are excited and measured simultaneously, the data are first corrected for optical crosstalk (due to overlapping emission spectra) between the fluorophores using each fluorophore' s emission spectrum.
- a grid is superimposed over the fluorescence signal image such that the signal from each spot is centered in each element of the grid.
- the fluorescence signal within each element is then integrated to obtain a numerical value corresponding to the average intensity of the signal.
- the software used for signal analysis is the GEMTOOLS gene expression analysis program (Incyte).
- Sequences complementary to the PKIN-encoding sequences, or any parts thereof, are used to detect, decrease, or inhibit expression of naturally occurring PKIN. Although use of oligonucleotides comprising from about 15 to 30 base pairs is described, essentially the same procedure is used with smaller or with larger sequence fragments. Appropriate oligonucleotides are designed using OLIGO 4.06 software (National Biosciences) and the coding sequence of PKTN. To inhibit transcription, a complementary oligonucleotide is designed from the most unique 5' sequence and used to prevent promoter binding to the coding sequence. To inhibit translation, a complementary oligonucleotide is designed to prevent ribosomal binding to the PKJN-encoding transcript.
- PKIN PKIN expression and purification of PKIN is achieved using bacterial or virus-based expression systems.
- cDNA is subcloned into an appropriate vector containing an antibiotic resistance gene and an inducible promoter that directs high levels of cDNA transcription.
- promoters include, but are not limited to, the trp-lac (tac) hybrid promoter and the T5 or T7 bacteriophage promoter in conjunction with the lac operator regulatory element.
- Recombinant vectors are transformed into suitable bacterial hosts, e.g., BL21(DE3).
- Antibiotic resistant bacteria express PKIN upon induction with isopropyl beta-D- thiogalactopyranoside (IPTG).
- PKTN PKTN in eukaryotic cells
- infecting insect or mammalian cell lines with recombinant Autographica californica nuclear polyhedrosis virus (AcMNPV), commonly known as baculovirus recombinant Autographica californica nuclear polyhedrosis virus (AcMNPV), commonly known as baculovirus.
- AcMNPV Autographica californica nuclear polyhedrosis virus
- the nonessential polyhedrin gene of baculovirus is replaced with cDNA encoding PKIN by either homologous recombination or bacterial-mediated transposition involving transfer plasmid intermediates. Viral infectivity is maintained and the strong polyhedrin promoter drives high levels of cDNA transcription.
- Recombinant baculovirus is used to infect Spodoptera frugiperda (Sf9) insect cells in most cases, or human hepatocytes, in some cases.
- PK N is synthesized as a fusion protein with, e.g., glutathione S- transferase (GST) or a peptide epitope tag, such as FLAG or 6-His, permitting rapid, single-step, affinity-based purification of recombinant fusion protein from crude cell lysates.
- GST glutathione S- transferase
- FLAG peptide epitope tag
- GST a 26- kilodalton enzyme from Schistosoma japonicum, enables the purification of fusion proteins on immobilized glutathione under conditions that maintain protein activity and antigenicity (Amersham Pharmacia Biotech). Following purification, the GST moiety can be proteolytically cleaved from PKTN at specifically engineered sites.
- FLAG an 8-amino acid peptide, enables immunoaffinity purification using commercially available monoclonal and polyclonal anti-FLAG antibodies (Eastman Kodak). 6-His, a stretch of six consecutive histidine residues, enables purification on metal-chelate resins (QIAGEN). Methods for protein expression and purification are discussed in Ausubel (1995, supra, ch. 10 and 16). Purified PKIN obtained by these methods can be used directly in the assays shown in Examples XVI, XVII, and XVHI where applicable. XIII. Functional Assays
- PKIN function is assessed by expressing the sequences encoding PKTN at physiologically elevated levels in mammalian cell culture systems.
- cDNA is subcloned into a mammalian expression vector containing a strong promoter that drives high levels of cDNA expression.
- Vectors of choice include PCMV SPORT (Life Technologies) and PCR3.1 (Invitrogen, Carlsbad CA), both of which contain the cytomegalo virus promoter. 5-10 ⁇ g of recombinant vector are transiently transfected into a human cell line, for example, an endothelial or hematopoietic cell line, using either liposome formulations or electroporation.
- 1-2 ⁇ g of an additional plasmid containing sequences encoding a marker protein are co-transfected.
- Expression of a marker protein provides a means to distinguish transfected cells from nontransfected cells and is a reliable predictor of cDNA expression from the recombinant vector.
- Marker proteins of choice include, e.g., Green Fluorescent Protein (GFP; Clontech), CD64, or a CD64-GFP fusion protein.
- FCM Flow cytometry
- FCM detects and quantifies the uptake of fluorescent molecules that diagnose events preceding or coincident with cell death. These events include changes in nuclear DNA content as measured by staining of DNA with propidium iodide; changes in cell size and granularity as measured by forward light scatter and 90 degree side light scatter; down-regulation of DNA synthesis as measured by decrease in bromodeoxyuridine uptake; alterations in expression of cell surface and intracellular proteins as measured by reactivity with specific antibodies; and alterations in plasma membrane composition as measured by the binding of fluorescein-conjugated Annexin V protein to the cell surface. Methods in flow cytometry are discussed in Ormerod, M.G. (1994) Flow Cytometry, Oxford, New York NY.
- PKIN The influence of PKIN on gene expression can be assessed using highly purified populations of cells transfected with sequences encoding PKIN and either CD64 or CD64-GFP.
- CD64 and CD64- GFP are expressed on the surface of transfected cells and bind to conserved regions of human immunoglobulin G (IgG).
- Transfected cells are efficiently separated from nontransfected cells using magnetic beads coated with either human IgG or antibody against CD64 (DYNAL, Lake Success NY).
- mRNA can be purified from the cells using methods well known by those of skill in the art. Expression of mRNA encoding PKIN and other genes of interest can be analyzed by northern analysis or microarray techniques.
- PKTN substantially purified using polyacrylamide gel electrophoresis PAGE; see, e.g., Harrington, M.G. (1990) Methods Enzymol. 182:488-495), or other purification techniques, is used to immunize rabbits and to produce antibodies using standard protocols.
- PAGE polyacrylamide gel electrophoresis
- the PKTN amino acid sequence is analyzed using LASERGENE software (DNASTAR) to determine regions of high immunogenicity, and a corresponding oligopeptide is synthesized and used to raise antibodies by means known to those of skill in the art.
- LASERGENE software DNASTAR
- Methods for selection of appropriate epitopes, such as those near the C-terminus or in hydrophilic regions are well described in the art. (See, e.g., Ausubel, 1995, supra, ch. 11.)
- oligopeptides of about 15 residues in length are synthesized using an ABI 431 A peptide synthesizer (Applied Biosystems) using FMOC chemistry and coupled to KLH (Sigma- Aldrich, St. Louis MO) by reaction with N-maleimidobenzoyl-N-hydroxysuccinimide ester (MBS) to increase immunogenicity.
- ABI 431 A peptide synthesizer Applied Biosystems
- KLH Sigma- Aldrich, St. Louis MO
- MBS N-maleimidobenzoyl-N-hydroxysuccinimide ester
- Rabbits are immunized with the oligopeptide-KLH complex in complete Freund's adjuvant.
- Resulting antisera are tested for antipeptide and anti-PKTN activity by, for example, binding the peptide or PKTN to a substrate, blocking with 1% BSA, reacting with rabbit antisera, washing, and reacting with radio-iodinated goat anti-rabbit IgG.
- Naturally occurring or recombinant PKTN is substantially purified by immunoaffinity chromatography using antibodies specific for PKTN.
- An immunoaffinity column is constructed by covalently coupling anti-PKTN antibody to an activated chromatographic resin, such as CNBr-activated SEPHAROSE (Amersham Pharmacia Biotech). After the coupling, the resin is blocked and washed according to the manufacturer's instructions. Media containing PKIN are passed over the immunoaffinity column, and the column is washed under conditions that allow the preferential absorbance of PKTN (e.g., high ionic strength buffers in the presence of detergent).
- the column is eluted under conditions that disrupt antibody/PKTN binding (e.g., a buffer of pH 2 to pH 3, or a high concentration of a chaotrope, such as urea or thiocyanate ion), and PKIN is collected.
- a chaotrope such as urea or thiocyanate ion
- PKTN or biologically active fragments thereof, are labeled with 125 I Bolton-Hunter reagent.
- Bolton-Hunter reagent See, e.g., Bolton A.E. and W.M. Hunter (1973) Biochem. J. 133:529-539.
- Candidate molecules previously arrayed in the wells of a multi-well plate are incubated with the labeled PKTN, washed, and any wells with labeled PKTN complex are assayed. Data obtained using different concentrations of PKIN are used to calculate values for the number, affinity, and association of PKIN with the candidate molecules.
- PKTN molecules interacting with PKTN are analyzed using the yeast two-hybrid system as described in Fields, S. and O. Song (1989) Nature 340:245-246, or using commercially available kits based on the two-hybrid system, such as the MATCHMAKER system (Clontech).
- PKTN may also be used in the PATHCALLTNG process (CuraGen Corp., New Haven CT) which employs the yeast two-hybrid system in a high-throughput manner to determine all interactions between the proteins encoded by two large libraries of genes (Nandabalan, K. et al. (2000) U.S. Patent No. 6,057,101). XVII.
- protein kinase activity is measured by quantifying the phosphorylation of a protein substrate by PKTN in the presence of gamma-labeled 3 P-ATP.
- PKTN is incubated with the protein substrate, 32 P-ATP, and an appropriate kinase buffer.
- the 32 P incorporated into the substrate is separated from free 32 P-ATP by electrophoresis and the incorporated 32 P is counted using a radioisotope counter.
- the amount of incorporated 3 P is proportional to the activity of PKTN.
- a determination of the specific amino acid residue phosphorylated is made by phosphoamino acid analysis of the hydrolyzed protein.
- protein kinase activity is measured by quantifying the transfer of gamma phosphate from adenosine triphosphate (ATP) to a serine, threonine or tyrosine residue in a protein substrate.
- ATP adenosine triphosphate
- the reaction occurs between a protein kinase sample with a biotinylated peptide substrate and gamma 32 P-ATP.
- free avidin in solution is added for binding to the biotinylated 32 P-peptide product.
- the binding sample then undergoes a centrifugal ultrafiltration process with a membrane which will retain the product-avidin complex and allow passage of free gamma 32 P-ATP.
- the reservoir of the centrifuged unit containing the 32 P-peptide product as retentate is then counted in a scintillation counter.
- This procedure allows assay of any type of protein kinase sample, depending on the peptide substrate and kinase reaction buffer selected.
- This assay is provided in kit form (ASUA, Affinity Ultrafiltration Separation Assay, Transbio Corporation, Baltimore MD, U.S. Patent No. 5,869,275).
- Suggested substrates and their respective enzymes are as follows: Histone HI (Sigma) and ⁇ 34 cdc2 kinase, Annexin I, Angiotensin (Sigma) and EGF receptor kinase, Annexin II and src kinase, ERKl & ERK2 substrates and MEK, and myelin basic protein and ERK (Pearson, J.D. et al. (1991) Methods Enzymol. 200:62-81).
- protein kinase activity of PKTN is demonstrated in vitro in an assay containing PKTN, 50 ⁇ l of kinase buffer, l ⁇ g substrate, such as myelin basic protein (MBP) or synthetic peptide substrates, 1 mM DTT, 10 ⁇ g ATP, and 0.5 ⁇ Ci [ ⁇ - 32 P]ATP.
- l ⁇ g substrate such as myelin basic protein (MBP) or synthetic peptide substrates
- adenylate kinase or guanylate kinase activity may be measured by the incorporation of 32 P from gamma-labeled 32 P -ATP into ADP or GDP using a gamma radioisotope counter.
- the enzyme in a kinase buffer, is incubated together with the appropriate nucleotide mono-phosphate substrate (AMP or GMP) and 32 P-labeled ATP as the phosphate donor.
- the reaction is incubated at 37°C and terminated by addition of trichloroacetic acid.
- the acid extract is neutralized and subjected to gel electrophoresis to separate the mono-, di-, and triphosphonucleotide fractions.
- the diphosphonucleotide fraction is cut out and counted.
- the radioactivity recovered is proportional to the enzyme activity.
- PKIN scintillation proximity assays
- useful substrates include recombinant proteins tagged with glutathione transferase, or synthetic peptide substrates tagged with biotin.
- Inhibitors of PKTN activity such as small organic molecules, proteins or peptides, may be identified by such assays.
- Agonists or antagonists of PKTN activation or inhibition may be tested using assays described in section XVII. Agonists cause an increase in PKTN activity and antagonists cause a decrease in
- Receptor tyrosine kinase BL00240 BLIMPS-BLOCKS S223 S276 T294 N964 E290-V337, V337-I389 S603 S707 S770 Receptor tyrosine kinase BL00239: BLIMPS-BLOCKS S781 S814 S880 E181-P228, L232-I254, W291-R340, T913 S531 T777 L345-I389 S89 T135 T363 Receptor tyrosine kinase BL00790: BLIMPS-BLOCKS T394 T395 T436 I154-C207, S298-W330, L356-M404 S599 S606 S636 Protein kinase signature and profile PROFILESCAN T644 S808 S821 protein_kinase_tyr
- SH3 domain signature PRO0452 BLIMPS-PRINTS P55-A65, D69-K84, D91-N100, R102-R114
- Protein kinases ATP-binding region MOTIFS signature Protein_Kinase_Atp : I140-K161
- INO ID Residues Sites Sites Databases
- Protein kinases ATP-binding region MOTIFS signature Protein_Kinase_Atp: 110-K33
- ABI FACTURA A program that removes vector sequences and Applied Biosystems, Foster City, CA. masks ambiguous bases in nucleic acid sequences.
- ABI/PARACEL FDF A Fast Data Finder useful in comparing and Applied Biosystems, Foster City, CA; Mismatch ⁇ 50 annotating amino acid or nucleic acid sequences. Paracel Inc., Pasadena, CA.
- ABI AutoAssembler A program that assembles nucleic acid sequences. Applied Biosystems, Foster City, CA.
- fastx score 100 or greater
- HMM hidden Markov model
- Phred A base-calling algorithm that examines automated Ewing, B. et al. (1998) Genome Res. sequencer traces with high sensitivity and probability. 8:175-185; Ewing, B. and P. Green (1998) Genome Res. 8:186-194.
- TMELMMER A program that uses a hidden Markov model (HMM) to Sonnhammer, EX. et al. (1998) Proc. Sixth Ind. delineate transmembrane segments on protein sequences Conf. on Intelligent Systems for Mol. Biol., and determine orientation. Glasgow et al., eds., The Am. Assoc. for Artificial Intelligence Press, Menlo Park, CA, pp. 175-182.
- HMM hidden Markov model
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JP2001578626A JP2004511204A (en) | 2000-04-20 | 2001-04-20 | Human kinase |
US10/258,106 US20040018185A1 (en) | 2001-04-20 | 2001-04-20 | Human kinases |
CA002406399A CA2406399A1 (en) | 2000-04-20 | 2001-04-20 | Human kinases |
AU2001255573A AU2001255573A1 (en) | 2000-04-20 | 2001-04-20 | Human kinases |
EP01928748A EP1297150A2 (en) | 2000-04-20 | 2001-04-20 | Human kinases |
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US19902100P | 2000-04-20 | 2000-04-20 | |
US60/199,021 | 2000-04-20 | ||
US20022600P | 2000-04-28 | 2000-04-28 | |
US60/200,226 | 2000-04-28 | ||
US20233900P | 2000-05-05 | 2000-05-05 | |
US60/202,339 | 2000-05-05 | ||
US20350500P | 2000-05-11 | 2000-05-11 | |
US60/203,505 | 2000-05-11 | ||
US60/205,564 | 2000-05-18 | ||
US20556400P | 2000-05-22 | 2000-05-22 | |
US20773900P | 2000-05-26 | 2000-05-26 | |
US60/207,739 | 2000-05-26 | ||
US20879500P | 2000-06-01 | 2000-06-01 | |
US60/208,795 | 2000-06-01 |
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Cited By (7)
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WO2001064905A2 (en) * | 2000-02-29 | 2001-09-07 | Millennium Pharmaceuticals, Inc. | 2504, 15977, and 14760, novel protein kinase family members and uses therefor |
WO2001092492A2 (en) * | 2000-05-30 | 2001-12-06 | Applera Corporation | Isolated human kinase proteins, nucleic acid molecules encoding human kinase proteins, and uses thereof |
WO2002024947A2 (en) * | 2000-09-20 | 2002-03-28 | Kinetek Pharmaceuticals, Inc. | Cancer associated protein kinases and their uses |
WO2002053717A2 (en) * | 2000-12-28 | 2002-07-11 | Pe Corporation (Ny) | Isolated human kinase proteins, nucleic acid molecules encoding human kinase proteins, and uses thereof |
WO2003083096A2 (en) * | 2002-03-28 | 2003-10-09 | Qlt Inc. | Cancer associated protein kinases and their uses |
EP1358320A2 (en) * | 2000-12-22 | 2003-11-05 | Millennium Pharmaceuticals, Inc. | 68730 and 69112 protein kinase molecules and uses therefor |
WO2004018669A1 (en) * | 2002-08-21 | 2004-03-04 | Proteinexpress Co., Ltd. | Salt-inducible kinases 2 and use thereof |
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EP0861896A2 (en) * | 1997-02-28 | 1998-09-02 | Dade Behring Marburg GmbH | Cell volume regulated human kinase h-sgk |
WO1999025843A2 (en) * | 1997-10-22 | 1999-05-27 | The Scripps Research Institute | Human checkpoint kinase, hcds1, compositions and methods |
WO1999057132A1 (en) * | 1998-05-07 | 1999-11-11 | Genetics Institute, Inc. | Secreted proteins and polynucleotides encoding them |
WO2000008180A2 (en) * | 1998-08-04 | 2000-02-17 | Immunex Corporation | HUMAN cDNAs ENCODING POLYPEPTIDES HAVING KINASE FUNCTIONS |
WO2001090365A2 (en) * | 2000-05-19 | 2001-11-29 | Millennium Pharmaceuticals, Inc. | Human protein kinase '13305' and uses therefor |
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2001
- 2001-04-20 WO PCT/US2001/012992 patent/WO2001081555A2/en not_active Application Discontinuation
- 2001-04-20 CA CA002406399A patent/CA2406399A1/en not_active Abandoned
- 2001-04-20 AU AU2001255573A patent/AU2001255573A1/en not_active Abandoned
- 2001-04-20 EP EP01928748A patent/EP1297150A2/en not_active Withdrawn
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EP0861896A2 (en) * | 1997-02-28 | 1998-09-02 | Dade Behring Marburg GmbH | Cell volume regulated human kinase h-sgk |
WO1999025843A2 (en) * | 1997-10-22 | 1999-05-27 | The Scripps Research Institute | Human checkpoint kinase, hcds1, compositions and methods |
WO1999057132A1 (en) * | 1998-05-07 | 1999-11-11 | Genetics Institute, Inc. | Secreted proteins and polynucleotides encoding them |
WO2000008180A2 (en) * | 1998-08-04 | 2000-02-17 | Immunex Corporation | HUMAN cDNAs ENCODING POLYPEPTIDES HAVING KINASE FUNCTIONS |
WO2001090365A2 (en) * | 2000-05-19 | 2001-11-29 | Millennium Pharmaceuticals, Inc. | Human protein kinase '13305' and uses therefor |
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DATABASE EMBL [Online] Entry/Acc.no. AC027074, 27 March 2000 (2000-03-27) BIRREN, B. ET AL.: "Homo sapiens chromosome 1 clone RP11-214B13 map 1, WORKING DRAFT SEQUENCE, 25 unordered pieces" XP002186884 * |
DATABASE EMBL [Online] Entry/Acc.no. AW166113, 13 November 1999 (1999-11-13) STRAUSBERG, R.: "xf45d06.x1 NCI_CGAP_Brn50 Homo sapiens cDNA clone IMAGE:2621003 3' similar to TR:O88904 O88904 HOMEODOMAIN-INTERACTING PROTEIN KINASE 1. ;, mRNA sequence." XP002186883 * |
ISHIKAWA K-I ET AL: "PREDICTION OF THE CODING SEQUENCES OF UNIDENTIFIED HUMAN GENES. X. THE COMPLETE SEQUENCES OF 100 NEW CDNA CLONES FROM BRAIN WHICH CAN CODE FOR LARGE PROTEINS IN VITRO" DNA RESEARCH, UNIVERSAL ACADEMY PRESS, JP, vol. 5, no. 3, 30 June 1998 (1998-06-30), pages 169-176, XP000980105 ISSN: 1340-2838 * |
YOUNG HO KIM ET AL: "HOMEODOMAIN-INTERACTING PROTEIN KINASES, A NOVEL FAMILY OF CO-REPRESSORS FOR HOMEODOMAIN TRANSCRIPTION FACTORS" JOURNAL OF BIOLOGICAL CHEMISTRY, AMERICAN SOCIETY OF BIOLOGICAL CHEMISTS, BALTIMORE, MD, US, vol. 273, no. 40, 2 October 1998 (1998-10-02), pages 25875-25879, XP002943633 ISSN: 0021-9258 * |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001064905A2 (en) * | 2000-02-29 | 2001-09-07 | Millennium Pharmaceuticals, Inc. | 2504, 15977, and 14760, novel protein kinase family members and uses therefor |
WO2001064905A3 (en) * | 2000-02-29 | 2002-08-08 | Millennium Pharm Inc | 2504, 15977, and 14760, novel protein kinase family members and uses therefor |
US6730491B2 (en) | 2000-02-29 | 2004-05-04 | Millennium Pharmaceuticals, Inc. | 2504, 15977, and 14760, novel protein kinase family members and uses therefor |
WO2001092492A2 (en) * | 2000-05-30 | 2001-12-06 | Applera Corporation | Isolated human kinase proteins, nucleic acid molecules encoding human kinase proteins, and uses thereof |
WO2001092492A3 (en) * | 2000-05-30 | 2002-07-04 | Applera Corp | Isolated human kinase proteins, nucleic acid molecules encoding human kinase proteins, and uses thereof |
US6653116B2 (en) | 2000-05-30 | 2003-11-25 | Applera Corporation | Isolated human kinase proteins |
WO2002024947A3 (en) * | 2000-09-20 | 2003-12-04 | Kinetek Pharmaceuticals Inc | Cancer associated protein kinases and their uses |
WO2002024947A2 (en) * | 2000-09-20 | 2002-03-28 | Kinetek Pharmaceuticals, Inc. | Cancer associated protein kinases and their uses |
EP1358320A4 (en) * | 2000-12-22 | 2005-04-27 | Millennium Pharm Inc | 68730 and 69112 protein kinase molecules and uses therefor |
EP1358320A2 (en) * | 2000-12-22 | 2003-11-05 | Millennium Pharmaceuticals, Inc. | 68730 and 69112 protein kinase molecules and uses therefor |
WO2002053717A2 (en) * | 2000-12-28 | 2002-07-11 | Pe Corporation (Ny) | Isolated human kinase proteins, nucleic acid molecules encoding human kinase proteins, and uses thereof |
US6689597B2 (en) | 2000-12-28 | 2004-02-10 | Applera Corporation | Isolated human kinase proteins |
WO2002053717A3 (en) * | 2000-12-28 | 2003-03-27 | Pe Corp Ny | Isolated human kinase proteins, nucleic acid molecules encoding human kinase proteins, and uses thereof |
WO2003083096A3 (en) * | 2002-03-28 | 2003-11-27 | Kinetek Pharmaceuticals Inc | Cancer associated protein kinases and their uses |
WO2003083096A2 (en) * | 2002-03-28 | 2003-10-09 | Qlt Inc. | Cancer associated protein kinases and their uses |
WO2004018669A1 (en) * | 2002-08-21 | 2004-03-04 | Proteinexpress Co., Ltd. | Salt-inducible kinases 2 and use thereof |
Also Published As
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WO2001081555A3 (en) | 2002-06-27 |
CA2406399A1 (en) | 2001-11-01 |
AU2001255573A1 (en) | 2001-11-07 |
EP1297150A2 (en) | 2003-04-02 |
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