WO2006132350A1 - 分泌型発光酵素を用いたレポーターアッセイ - Google Patents
分泌型発光酵素を用いたレポーターアッセイ Download PDFInfo
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- WO2006132350A1 WO2006132350A1 PCT/JP2006/311597 JP2006311597W WO2006132350A1 WO 2006132350 A1 WO2006132350 A1 WO 2006132350A1 JP 2006311597 W JP2006311597 W JP 2006311597W WO 2006132350 A1 WO2006132350 A1 WO 2006132350A1
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6897—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids involving reporter genes operably linked to promoters
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- 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
- C12N9/0004—Oxidoreductases (1.)
- C12N9/0069—Oxidoreductases (1.) acting on single donors with incorporation of molecular oxygen, i.e. oxygenases (1.13)
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/66—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving luciferase
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y113/00—Oxidoreductases acting on single donors with incorporation of molecular oxygen (oxygenases) (1.13)
- C12Y113/12—Oxidoreductases acting on single donors with incorporation of molecular oxygen (oxygenases) (1.13) with incorporation of one atom of oxygen (internal monooxygenases or internal mixed function oxidases)(1.13.12)
- C12Y113/12006—Cypridina-luciferin 2-monooxygenase (1.13.12.6), i.e. cypridina-luciferase
Definitions
- the present invention relates to a reporter assay method using, for example, a secretory luminescent enzyme as a reporter protein.
- Reporter assembly refers to, for example, a gene encoding a reporter protein (hereinafter referred to as a "reporter gene”! That is transcribed directly by the DNA sequence required for transcription initiation such as a promoter. Or it is a method for measuring indirectly.
- reporter assembly a specific reporter gene is ligated 3 ′ downstream of a promoter, and this is inserted as a plasmid or into a chromosome to construct a transformant.
- reporter assembly it is usually not easy to quantify mRNA synthesized by a specific reporter gene force linked 3 'downstream of the promoter. Therefore, it is often the case that the amount of protein synthesized by reading the mRNA information is used as a measurement target.
- an enzyme is used as a reporter protein, and the enzyme activity value is generally regarded as a value representing the relative value of the initial mRNA synthesis amount. Is.
- the reporter assembly it is generally accepted that the final measured enzyme activity is correlated with the transcriptional activity of the initial promoter.
- a reporter assembly is used to examine the presence and amount of a specific chemical substance.
- the dioxin receptor protein Aryl hydrocarbon receptor (AhR) is known. This receptor protein has the function of promoting the transcriptional activity of genes such as CYP1A Cytochrome P450 isozyme) when bound to dioxin. .
- the complex of dioxin and dioxin receptor protein translocates to the nucleus, binds to a target sequence (such as a sequence called XRE), and activates transcription of the gene linked to the target sequence. . Therefore, prepare cells that express the dioxin receptor protein.
- a reporter plasmid having a target sequence of dioxin receptor protein in a plug motor is prepared.
- a predetermined reporter gene exists 3 ′ downstream of the promoter.
- the reporter plasmid is then introduced into cells that express the dioxin receptor protein.
- dioxin When dioxin is added to the culture medium, the dioxin penetrates into the cell and binds to the dioxin receptor. This complex of dioxin and dioxin receptor protein translocates to the nucleus and binds to the target sequence present in the reporter plasmid, thereby activating transcription of the reporter gene.
- reporter protein production and production Kawanishi, M., Sakamoto, M., Ito, A "Kishi, K., Yagi, T. (2003) Mut. Res. 540, 99-105.
- environmental hormones endocrine disruptors
- estrogen receptors that bind to them.
- a system that detects environmental hormones has also been developed in combination.
- Tsuno or hybrid system As a typical method for examining the interaction between proteins, an experimental system called a Tsuno or hybrid system is widely used.
- the experimental system also basically uses a reporter assay (Jung, J “Ishida, K., Nishihara, ⁇ . (2004) Life Sci. 74, 3065-30 74).
- the components constituting the reporter assembly can be roughly classified into two.
- the first component is a component for inducing transcriptional activity. Basically, a promoter or a promoter containing a DNA sequence involved in transcription activation 'suppression and promoter activation is promoted. Receptor 'coactivator and others are composed. In some cases, for example, when a reporter assay is used to detect a gene mutation as described above, a gene having an abnormal stop codon is the first component.
- the second component is a component for making it possible to measure transcription activity, and basically also has a reporter protein force.
- the first component varies depending on the object to be measured, but the second component is basically versatile. That is, a specific reporter protein can be commonly used for various reporter assays. In this way, if a superior reporter protein is developed, an advanced reporter protein can be developed by using it instead of the reporter protein used in the conventional reporter assay.
- Reporter assembly has been conventionally constructed using various hosts such as Escherichia coli, yeast, and cultured cells.
- the basic principle is the common force.
- the special considerations in selecting a host are whether it is possible to reconstruct the activity (transcription activation) of the promoter to be analyzed, and whether the reporter protein is expressed. .
- a transformant expressing the human dioxin receptor is constructed.
- E. coli, a prokaryote is used as a host, the expression of human proteins is generally difficult, and the intracellular environment is significantly different from that of eukaryotic human cells.
- cultured cells are often used as a host for reporter assembly because the environment is very similar to human cells.
- the cultivation of cultured cells is generally more expensive due to the use of expensive urine fetal serum. Since the speed is very slow compared to microorganisms, there is a problem that the experiment takes time.
- yeast used for culturing grows faster, and is inexpensive. Furthermore, since yeast is the same eukaryotic cell as humans, it is very similar to the human intracellular environment, and it is known that it is easy to produce human proteins. Because of these advantages, various reporter assemblies using yeast have been proposed. Typical examples include a reporter assembly for detecting dioxin and environmental hormones, and a two-hybrid method for analyzing protein interactions.
- the reporter proteins listed above are all proteins expressed in cells.
- cell recovery by centrifugation and disruption of cells by ultrasound, surfactant, organic solvent (or cell permeability) Enhance operation is essential. These operations are not suitable for processing many samples. That is, as long as these reporter proteins are used, a so-called high-throughput assembly that processes a large number of samples cannot be constructed.
- reporter protein having high sensitivity and simplicity that can be used in a reporter assembly using yeast has not been reported.
- An ideal reporter protein in terms of simplicity is a secreted protein that does not require cell collection and disruption.
- the ideal reporter protein in terms of high sensitivity is most suitable for a protein that produces luminescence with a low background in the measurement principle.
- Patent Document 2 a gene encoding luciferase derived from Cypridina noctiluca is cloned, and the luciferase is secreted very efficiently in mammalian cells. Is disclosed. However, in reporter assemblies using fermenters, examples of using secretory luminescent enzymes as reporter proteins, including luciferase from Cypridina noctiluca and other secreted luciferases, have been reported so far. Nah ...
- Patent Document 1 Japanese Translation of Special Publication 2003-530106
- Patent Document 2 Japanese Patent Application Laid-Open No. 2004-187652
- Non-patent literature l Harger, JW and Dinman JD, "RNA", 2003, VIII, p.1019-1024
- Non-patent literature 2 Bovee, TFH, Helsdingen, RJR, Koks, PD, Kuiper, HA, Hooge nboom, R ⁇ . AP, Keijer, J., TGeneJ, 2004 ⁇ , No. 325 , p.187-200
- Non-Patent Document 3 Leskinen P., Virtaq, M., Karp, M., “Yeast”, 2003, No. 20, p.1109-
- Patent Document 4 Nakajima Y., Kobayasni, K., Yamagishi, K., Enomoto, T., Ohmiya, Y. [Bioscience, Biotechnology, and Biochemistry J, 2004, Brother 68 ⁇ , p.565-570 Disclosure of Invention
- the present invention has an object to provide a simple and highly sensitive reporter assembly method. Means for solving the problem
- the present inventors examined using the culture or culture supernatant as it is for the reporter assembly.
- a secretory luminescent enzyme as a reporter protein.
- the present inventors introduced a gene encoding a secretory luminescent enzyme into a host, and obtained a culture or culture supernatant of the resulting transformant. After contacting with the secretory luminescent enzyme substrate, the expression, function, transcriptional activity or transcriptional control function of the foreign gene or DNA fragment introduced into the host is measured by measuring the enzyme activity of the secretory luminescent enzyme. The inventors have found that it can be evaluated efficiently and have completed the present invention.
- the present invention includes the following.
- [0022] First step of introducing a gene encoding a secretory luminescent enzyme into a host, and contacting the culture or culture supernatant of the transformant obtained in the first step with the substrate of the secretory luminescent enzyme A foreign gene or foreign D introduced into the host based on the enzyme activity of the secretory luminescent enzyme.
- a reporter assay method characterized by evaluating expression, function, transcriptional activity or transcriptional control function of NA fragment.
- the foreign gene encodes a force linked to a gene encoding the secretory luminescent enzyme, or a gene encoding a secretory signal peptide and a mature protein in the gene encoding the secretory luminescent enzyme.
- the reporter assay method according to (1) wherein the reporter assay method is inserted between the gene and the target gene.
- the secretory luciferase is a sea urchin luciferase
- the secretory luminescent enzyme is a fusion protein of a secretory signal peptide that functions in the host and a mature protein of the secretory luminescent enzyme, according to (1), Reporter Atsay method.
- a secretory luminescent enzyme comprising: a second step of contacting a culture or culture supernatant of the resulting transformant with a substrate of the secretory luminescent enzyme; and a third step of measuring the enzyme activity of the secretory luminescent enzyme.
- a reporter assay method characterized by evaluating the secretory ability of the secretory signal peptide or secreted protein based on the enzyme activity of
- the secretory luciferase is a sea urchin luciferase
- the secretory luciferase is a sea urchin luciferase
- the yeast transformant is cultured under conditions of pH 3.5 to 6.5
- reporter assembly can be performed efficiently by using yeast and a secretory luminescent enzyme such as secretory luciferase.
- Fig. 1 shows the results of examining the culture conditions when secreting and expressing CLuc from a transformant expressing CLuc.
- FIG. 2A shows the results of measurement of CLuc activity using a diluted solution of Cypridina luciferin diluted with various pH buffers.
- FIG. 2B shows the results of measuring CLuc activity using diluted solutions of Cypridina luciferin diluted with various final concentrations of Tris-HCl (pH 7.4).
- FIG. 3 shows the results of measuring CLuc activity using culture supernatants of transformants expressing CLuc diluted stepwise against various final concentrations of luciferin in the reaction solution.
- FIG. 4 shows the relative residual activity of CLuc activity measured after incubation of the culture supernatant of a transformant expressing CLuc at each temperature for a certain period of time.
- FIG. 5 shows the results of examining the linearity and dynamic range in the CLuc activity measurement of the culture supernatant of a transformant expressing CLuc.
- FIG. 6 shows the results of examining the inhibitory effects of various chemical substances on CLuc when measuring CLuc activity.
- FIG. 7A shows the results of measurement of CLuc activity (RLU) using culture media or culture supernatants of transformants expressing CLuc having various turbidities.
- FIG. 7B shows the results of measuring CLuc activity (RLU / OD) using a culture solution and culture supernatant of a transformant expressing CLuc.
- Fig. 8 shows the results of measuring CLuc activity using each culture solution sample after sampling the culture solution of a transformant expressing CLuc and incubating at 25 ° C for a predetermined time. The results are shown.
- FIG. 9 shows the results of measuring CLuc activity using a culture solution of a transformant having a CLuc-encoding DNA linked to a TDH3 promoter cultured in a 96-well deep well plate.
- FIG. 10 shows the results of measuring mCLuc activity using a culture solution of a transformant having DNA encoding mCLuc linked to various promoters shown at the bottom.
- FIG. 11 shows the results of measuring ⁇ -galatatosidase activity using a culture solution of a transformant having DNA encoding / 3-galatatosidase linked to various promoters shown in the lower part.
- FIG. 12 shows the amount of mCLuc mRNA measured by the real-time PCR method and normalized by the amount of TDH3 mRNA.
- FIG. 13A shows the use of a culture solution of a transformant having DNA encoding mCLuc linked to various promoters shown in the lower part in the presence and absence of copper ions. The result of measuring the activity is shown.
- FIG. 13B shows the results obtained by using a culture medium of a transformant having DNA encoding j8-galatatosidase linked to various promoters shown in the lower part in the presence and absence of copper ions. -The result of having measured galatatosidase activity is shown.
- FIG. 14A shows mCLuc activity in the presence and absence of galactose using a culture solution of a transformant having DNA encoding mCLuc linked to various promoters shown at the bottom. The measurement results are shown.
- FIG. 14B shows ⁇ -galatatosidase activity in the presence and absence of galactose using a culture medium of a transformant having DNA encoding ⁇ -galatatosidase linked to various promoters shown at the bottom. The measurement results are shown.
- FIG. 15 shows mCLuc ligated to various lengths of the TDH3 promoter shown in the left panel (these promoter sequences each have a known cis sequence as shown in the figure). The results of measuring the mCLuc activity using a culture solution of a transformant having DNA encoding ss are shown.
- FIG. 16 shows GAL1 promoters of various lengths shown in the left panel.
- the motor sequence shows the result of measuring the mCLuc activity using the culture medium of the transformant having the DNA encoding mCLuc linked to the known cis sequence as shown in the figure) .
- FIG. 17 shows the DNA shown in the lower part (corresponding to the code region contained in the third exon of the rat ApoE gene) and the ⁇ factor secretion signal peptide DNA of a CLuc-encoding DNA.
- ApoE (+) indicates DNA that does not contain a stop codon
- ApoE ( ⁇ ) indicates DNA that includes a stop codon
- ApoE (+/ ⁇ ) indicates DNA that is an equivalent mixture of both.
- the reporter assay method is a method for evaluating the expression, function, transcriptional activity, or transcriptional control function of a foreign gene or a foreign DNA fragment using a secretory luminescent enzyme as a reporter protein.
- a gene encoding a secretory luminescent enzyme hereinafter referred to as “secreted luminescent enzyme gene”
- secreted luminescent enzyme gene a gene encoding a secretory luminescent enzyme
- secreted luminescent enzyme gene a gene encoding a secretory luminescent enzyme
- secreted luminescent enzyme gene a gene encoding a secretory luminescent enzyme
- the culture or culture supernatant of the obtained transformant is brought into contact with the secretory luminescent enzyme substrate under conditions where an enzyme reaction of the secretory luminescent enzyme can occur, and then the secretory luminescent enzyme.
- secretory luminescent enzyme measures enzyme activity.
- the secretory luminescent enzyme means an enzyme that is secreted outside the cell membrane or outside the cell wall and catalyzes a reaction that emits light by decomposition of the substrate.
- Examples of secretory luminescent enzymes / substrates that can be used in the reporter assay method according to the present invention include secreted luciferase / luciferin and secreted phosphatase / 1,2-dioxetane derivative.
- Secretory luciferase catalyzes the oxidation of luciferin as a substrate by oxygen molecules. At this time, the acid energy product (oxyluciferin) is generated in an excited state by the generated reaction energy, and emits light when it becomes the basis.
- luciferase derived from Cypridina noctiluca (cDNA: SEQ ID NO: 1, amino acid sequence: SEQ ID NO: 2) and luciferase derived from Vargula hilgendorfii (cDNA: SEQ ID NO: 3, amino acid sequence: SEQ ID NO: 4), etc.
- Citrus luciferase luciferase derived from Oplophorus gracilirostris (cDNA: SEQ ID NO: 5, amino acid sequence: SEQ ID NO: 6), and luciferase derived from the copepod Metridia longa (cDNA: SEQ ID NO: 7, amino acid sequence: SEQ ID NO: 8)
- luciferase derived from Cypridin a noctiluca is preferred because of its high secretion efficiency!
- Secretory phosphatase catalyzes the dephosphorylation of a 1,2-dioxetane derivative (CDP-Star, CSPD; Applied Biosystems), which is a luminescent substrate. At this time, the dephosphorylated substrate is spontaneously decomposed into adamantanone and a phosphor, and emits light when the phosphor produced in the excited state by the reaction energy becomes the ground state.
- Examples of the secretory phosphatase include human placental alkaline phosphatase (SEAP; cDNA: SEQ ID NO: 9, amino acid sequence: SEQ ID NO: 10).
- secretory proteins including secretory luminescent enzymes are synthesized in the form of precursors having a secretory signal peptide at the N-terminus. This precursor is cleaved by a signal peptidase during the transmembrane process to become a mature protein.
- the mature protein means a protein secreted outside the cell membrane or outside the cell wall.
- a mature protein generally has a secretory signal peptide removed.
- the mature protein includes a protein from which a sequence presumed to be a secretory signal peptide is excluded even when the secretory signal peptide is not removed.
- the secretory luminescent enzyme may be a fusion protein of a secretory signal peptide and a non-secretory luminescent enzyme as long as it is actually secreted outside the cell membrane or cell wall.
- a secretory luminescent enzyme a secretory signal peptide known to function as a secretory signal peptide in the selected host is used instead of the original secretory signal peptide.
- a fusion protein linked to the N-terminal may be used as a secretory luminescent enzyme.
- Saccharomyces cerevisiae ⁇ -factor secretion, signanopeptide (cDNA: SEQ ID NO: 11, amino acid sequence: SEQ ID NO: 12) is highly secreted in yeast. It is known to provide efficiency.
- secretory signal peptides in yeast include secretory signal peptides of invertase.
- the secretory signal peptide of the secreted luciferase derived from Cypridina noctiluca is the first to 18th amino acid sequence in the amino acid sequence of the secreted luciferase derived from Cypridina noctiluca shown in SEQ ID NO: 2.
- a fusion protein (cDNA: SEQ ID NO: 13, amino acid sequence: sequence) in which the a-factor secretion signal peptide is linked to the N-terminus of the secreted luciferase mature protein derived from Cypridina noctiluca Number 14) can be used as a secretory luminescent enzyme.
- the base sequence of the secretory luminescent enzyme gene and the corresponding amino acid sequence thereof are not limited to the base sequence shown in the above SEQ ID NO and the corresponding amino acid sequence.
- Each secretory luminescent enzyme consists of an amino acid sequence in which one or several (for example, 1 to 10, 1 to 5) amino acids are substituted, deleted or added in the amino acid sequence shown in the above SEQ ID NO. What is necessary is just to be secreted and to have the enzyme activity which each enzyme has.
- the secretory luminescent enzyme gene can be determined by optimizing the base sequence of the secretory luminescent enzyme gene shown in the above SEQ ID NO.
- a secretory luminescent enzyme gene is a synthetic gene (cDNA: SEQ ID NO: 15) in which a luciferase gene (cDNA: SEQ ID NO: 1) derived from Cypridina noctiluca is optimized for use in Saccharomyces cerevisiae.
- the amino acid sequence of luciferase encoded by the gene is identical to the amino acid sequence of wild-type luciferase (SEQ ID NO: 2).
- the foreign gene in the reporter assembly method according to the present invention may be a gene encoding such a protein or peptide.
- it can be divided into, for example, the first to third embodiments as follows.
- a gene encoding a protein is a foreign gene.
- a gene encoding a target protein derived from DNA or RNA prepared by a human blood sample or the like becomes a foreign gene. The In these cases, the foreign gene is inserted between the gene encoding the secretory signal peptide and the gene encoding the mature protein in the force linked to the 5 ′ upstream side of the secretory luminescent enzyme gene or the secretory luminescent enzyme gene.
- the Rukoto it is preferable to link a foreign gene between the gene encoding the secretory signal peptide and the gene encoding the mature protein in the secretory luminescent enzyme gene from the viewpoint that it does not easily lose the function of the secretory luminescent enzyme.
- the enzyme activity value of the secretory luminescent enzyme is correlated with the expression, activity or function of the foreign gene.
- a gene encoding a specific normal protein is used as a control foreign gene.
- test gene a gene that evaluates whether an abnormal stop codon or the like exists in a gene (hereinafter referred to as “test gene”) is a foreign gene. Furthermore, the enzyme activity value when using the test gene is lower or not at all compared to the enzyme activity value when using the control foreign gene. Can be evaluated without determining.
- a gene encoding an exogenous transcription factor, transcription repressing factor or the like is mentioned as the exogenous gene.
- the “foreign gene” may be a gene derived from the host.
- the gene may be linked to all or part of a gene encoding another transcription factor or transcription repressor, and the gene encoding the fusion protein may be a foreign gene.
- the reporter assembly method according to the present invention is used in a two-hybrid system using yeast, the ability to interact with a gene encoding a bait protein and a decoy protein is tested.
- the gene that encodes the protein is a foreign gene.
- the foreign gene is not directly linked to the secretory luminescent enzyme gene, but is present at another position on the same plasmid, on another plasmid or chromosome, and expressed in the host.
- the enzyme activity value of the secretory luminescent enzyme is used to control the transcription of the protein itself encoded by the foreign gene, or in the two-hybrid system, the interaction between the decoy protein and the test protein. Can be evaluated.
- the enzyme activity value of the secretory luminescent enzyme is used to determine the strength of the one-hybrid system, such as the DNA-binding ability involved in transcriptional activation and the interaction with cofactors and RNA polymerases. Can be evaluated.
- the reporter assembly method screens a protein immobilized on the cell membrane or cell wall (hereinafter referred to as "cell membrane protein or cell wall protein”) from among a large number of proteins.
- the gene encoding the protein to be screened becomes a foreign gene.
- the foreign gene is linked 5 ′ upstream or 3 ′ downstream of the secretory luminescent enzyme gene.
- the secretory luminescent enzyme gene is linked to the exogenous gene so that the secretory luminescent enzyme is immobilized on the cell membrane or cell wall outside the cell membrane or cell wall.
- the cell membrane protein or cell wall protein is immobilized on the cell membrane or cell wall of the host together with the secretory luminescent enzyme. Based on the enzyme activity value of the immobilized secretory luminescent enzyme, a cell membrane protein or cell wall protein encoded by a foreign gene can be screened.
- the cell membrane protein or cell wall protein in addition, only the shift at the N-terminus or C-terminus may be present outside the cell membrane or outside the cell wall. Therefore, according to the above-described screening using the reporter assay method according to the present invention, the cell membrane protein or cell wall protein has a displacement at the C-terminus or N-terminus, outside the cell membrane or cell wall. It can be evaluated by the enzyme activity value of the secretory luminescent enzyme. Furthermore, according to the above-described screening using the reporter assay method according to the present invention, the expression level of cell membrane protein or cell wall protein can be evaluated using the enzyme activity value of secretory luminescent enzyme.
- examples of the foreign DNA fragment include a promoter, a DNA fragment containing a sequence generally referred to as a cis-sequence that activates or suppresses transcription, and a synthetic DNA. Furthermore, it may be a DNA fragment containing a sequence that contributes to mRNA stability or a sequence that affects translation efficiency.
- the promoter used as the foreign DNA fragment is a promoter derived from any organism or an artificial cis sequence. A certain combination may be any sequence including an artificial sequence as long as it has a function as a promoter. For example, when the foreign DNA fragment is a promoter, a promoter is linked 5 ′ upstream of the secretory luminescent enzyme gene.
- the enzyme activity value of the obtained secretory luminescent enzyme can be evaluated as the relative transcription activity value of the promoter used as the foreign DNA fragment.
- the foreign DNA fragment is a ds sequence that causes transcriptional activity or transcriptional repression, a sequence that affects mRNA stability, or a sequence that affects translation efficiency, it is relative to the secretory luminescent enzyme gene.
- the target position can be any position as long as it functions.
- the transcription control function for example, transcription activation or transcription
- the degree of contribution to mRNA stability or the degree of influence on translation efficiency.
- other foreign DNA fragments are linked to positions that can be controlled with respect to the secretory luminescent enzyme gene.
- the host is not particularly limited as long as it can function as a secretory luminescent enzyme gene and a foreign gene or a foreign DNA fragment in the host, but Escherichia coli such as yeast and Escherichia coli.
- Escherichia coli such as yeast and Escherichia coli.
- Bacillus subtilis such as Bacillus subtilis
- Pseudomonas putida such as Pseudomonas
- animal cells such as COS cells
- insect cells such as S19, or Brassicaceae Plants to which it belongs.
- the yeast may be any yeast, such as Saccharomyces cerevisiae, Schizosaccharomyces pombe, Pichia pastoris, Candida albicans, Hansenura. 'Polymorpha (Hansenula polymorpha) is mentioned, and Saccharomyces cerevisiae is particularly preferable.
- a secretory luminescent enzyme gene and a foreign gene or a foreign DNA fragment are prepared.
- Secretory luminescent enzyme genes, foreign genes, and foreign DNA fragments are complementary to the nucleotide sequences at both ends of the region, for example, by using the genomic DNA of organisms having these genes as saddles. It can be easily obtained by PCR using simple primers.
- the base sequence of a gene or the like has been determined, then, by chemical synthesis, by PCR using a cleaved probe as a cage, or using a DNA fragment having the base sequence as a probe Genes etc. can be obtained by hybridizing
- mutants of genes and the like having the same functions as before mutation can be synthesized by site-directed mutagenesis.
- a known method such as the Kunkel method or the Gapped duplex method or a method equivalent thereto can be employed.
- a mutagenesis kit for example, Mutant-K (TAKARA) or Mutant-G (TA KARA)
- LA PCR in by TAKARA Mutations are introduced using the in vitro Mutagenesis series kit.
- a DNA in which the foreign gene or the foreign DNA fragment is linked to a secretory luminescent enzyme gene is prepared.
- a foreign gene or a foreign DNA fragment is inserted between a gene encoding a secretory signal peptide in a secretory luminescent enzyme gene and a gene encoding a mature protein
- the secretory signal peptide in the secretory luminescent enzyme gene is encoded.
- Such DNA may be the DNA itself linked or inserted as described above, or a vector containing the DNA!
- the purified secretory luminescent enzyme gene and foreign gene or foreign DNA fragment are cleaved with an appropriate restriction enzyme and ligated.
- the method is adopted.
- a secretory luminescent enzyme gene and an exogenous gene or a foreign DNA fragment each having a homologous region can be linked to each other by an in vitro method using PCR or an in vivo method using yeast. It may be a method to do.
- a foreign gene or a foreign DNA fragment between a gene encoding a secretory signal peptide in a secretory luminescent enzyme gene and a gene encoding a mature protein may be carried This can be carried out according to the method for linking genes or foreign DNA fragments.
- a vector containing a gene or a DNA into which a foreign DNA fragment has been inserted (hereinafter referred to as “DNA according to the present invention”) can be obtained by inserting the DNA according to the present invention into an appropriate vector.
- the vector to be used is not particularly limited as long as it is replicable in the host, and examples thereof include plasmids, shuttle vectors, helper plasmids and the like. If the vector itself does not have replication ability, it may be a DNA fragment that can be replicated by inserting it into a host chromosome.
- Plasmid DNA includes plasmids derived from E. coli (eg, pBR322, pBR325, pUC118, pUC119, pUC18, pUC19, pBluescript, etc.), plasmids derived from Bacillus subtilis (eg, pUB 110, pTP5, etc.), and plasmids derived from yeast ( For example, ⁇ system such as ⁇ 13, YCp system such as YCp50, etc.), and phage DNA include fly phage (Charon4A, Charon21A, EMB L3, EMBL4, gtl0, gtll, ⁇ ZAP, etc.). Furthermore, it is possible to use animal viruses such as retroviruses or mosquito viruses, and insect virus vectors such as baculoviruses.
- animal viruses such as retroviruses or mosquito viruses
- insect virus vectors such as baculoviruses.
- the method of inserting the DNA according to the present invention into a vector can be performed according to the above-described method of ligating a foreign gene or a foreign DNA fragment to a secretory luminescent enzyme gene.
- the DNA according to the present invention or a vector containing the DNA according to the present invention (hereinafter referred to as "the vector or the like according to the present invention") is introduced into the host.
- the vector or the like according to the present invention is introduced into the host.
- the secretory luminescent enzyme gene and the foreign gene are present in separate vectors, for example, the vector having the secretory luminescent enzyme gene and the vector having the foreign gene are introduced into the same host. To produce a transformant.
- the method for introducing the vector according to the present invention into yeast is not particularly limited as long as it is a method for introducing DNA into yeast.
- electroporation electroporation (elect mouth position method), spheroplast method, acetic acid Examples include the lithium method.
- it may be a Yip-based vector or a method of replacing yeast into a chromosome using a DNA sequence homologous to an arbitrary region in a chromosome.
- the method of introducing the vector according to the present invention into yeast is generally Depending on the method described in the experiment or academic paper.
- the method for introducing the vector according to the present invention into bacteria is not particularly limited as long as it is a method for introducing DNA into bacteria. Examples thereof include a method using calcium ions and an eletroporation method.
- monkey cells such as COS-7, Vero, Chineseno, Muster oocyte (CHO cells), mouse L cells and the like are used.
- Examples of the method for introducing the vector according to the present invention into animal cells include the electopore position method, the calcium phosphate method, and the lipofusion method.
- insect cells When insect cells are used as hosts, S19 cells and the like are used.
- methods for introducing the vector according to the present invention into insect cells include the calcium phosphate method, the lipofusion method, and the electopore position method.
- plant cultured cells When a plant is used as a host, the whole plant body, plant organ (eg, leaf, petal, stem, root, seed, etc.), plant tissue (eg, epidermis, phloem, soft tissue, xylem, vascular bundle, etc.) Alternatively, plant cultured cells are used.
- plant organ eg, leaf, petal, stem, root, seed, etc.
- plant tissue eg, epidermis, phloem, soft tissue, xylem, vascular bundle, etc.
- plant cultured cells are used. Examples of the method for introducing a vector according to the present invention into a plant include an electroporation method, an agglomerate method, a particle gun method, and a PEG method.
- Confirmation of the ability of the vector according to the present invention to be incorporated into the host can be performed by PCR, Southern hybridization, Northern hybridization, or the like.
- DNA is prepared from the transformant, and DNA-specific primers are designed and PCR is performed.
- the amplified product is subjected to agarose gel electrophoresis, polyacrylamide gel electrophoresis, capillary single electrophoresis, etc., stained with bromide zyme, SYBR Green solution, etc., and the amplified product is detected as a band to transform the amplified product. Confirm that it was done.
- PCR can be performed using primers previously labeled with a fluorescent dye or the like to detect amplification products.
- a method may be employed in which the amplification product is bound to a solid phase such as a microplate and the amplification product is confirmed by fluorescence or enzymatic reaction.
- the obtained transformant is cultured under conditions that allow it to grow. Furthermore, in this method, when the transformant culture is directly used for enzyme activity measurement, the secretory luminescent enzyme is not inactivated!
- the Rukoto For example, for the culture of transformed yeast into which secretory luciferase such as luciferase from Cypridina noctiluca is introduced as a secretory luminescent enzyme!
- the temperature is set to, for example, 4 to 37 ° C, preferably 20 to 30 ° C so that the yeast grows and the luciferase is not inactivated.
- the pH of the medium may be set to, for example, 3.5 to 6.5, preferably 5.5 to 6.0.
- the culture time is preferably 1 to 120 hours, preferably 1 to 24 hours in the logarithmic growth phase, as long as the activity of the secretory luminescent enzyme can be measured.
- the reporter assay method after culturing the transformant, the resulting culture or culture supernatant is subjected to secretory luminescence under conditions that can cause an enzyme reaction of secretory luminescent enzyme.
- the condition under which the enzyme reaction occurs means a condition in which the substrate is specifically bound to the active center of the secretory luminescent enzyme to form a complex and the enzyme reaction proceeds.
- the contact means a state in which the secretory luminescent enzyme in the culture or culture supernatant is close to the substrate and an enzyme reaction occurs.
- the culture means a culture solution or a medium containing a transformant.
- the culture solution or medium containing the transformant can be used as it is.
- a culture supernatant obtained by separating a transformant by centrifugation or the like may be used.
- the temperature is, for example, 0 to 40 ° C.
- the temperature is preferably set to 15 to 30 ° C.
- the pH may be set to 4.0 to 9.0, preferably 6.0 to 8.0, for example.
- the contact time is, for example, 1 second to 30 minutes, preferably 1 second to 30 seconds.
- the pH of the culture or culture supernatant can be shifted to a pH at which the enzyme activity of the secretory luminescent enzyme is high.
- a Tris-HCl buffer (less than 2M (preferably 50 mM to 200 mM) and pH 3.5 to 9.0 (preferably pH 7.0 to 8.0)
- a luciferin solution diluted with a buffer such as Tris-HC1 By adding a luciferin solution diluted with a buffer such as Tris-HC1), the pH at the time of contact described above can be set.
- the concentration of the substrate relative to the culture or culture supernatant can be appropriately determined according to the secretory luminescent enzyme and the substrate.
- the culture or culture supernatant of a transformant having secretory luciferase is used.
- the luciferin, which is the substrate is added to a final concentration of 0.1 ⁇ or more, preferably 1.25 2.5 ⁇ , with respect to turbidity (eg, absorbance at 600) of 0.05 or more.
- the enzyme activity of the secretory luminescent enzyme is measured.
- the measuring method can be appropriately selected according to the secretory luminescent enzyme. For example, when secretory luciferase is used as the secretory luminescent enzyme, the culture of the transformant or the mixture of the culture supernatant and the substrate is subjected to luminescence measurement using a luminometer, and the relative luminescence intensity ( The enzyme activity is measured as RLU).
- the turbidity eg, absorbance at 600 nm
- the relative luminescence intensity is expressed as turbidity.
- the value corrected by dividing (RLU / OD) can be used as the enzyme activity value.
- a method of measuring the amount of ATP contained in the transformant and dividing the relative luminescence intensity by this value is also preferable.
- another enzyme or protein may be expressed at the same time, the amount of the enzyme or protein is measured, and the relative luminescence intensity is divided by the value to correct.
- luminescent enzymes and mutants of the secretory luminescent enzyme according to the present invention can be expressed and A method of correcting by dividing by luminescence derived from the luminescent enzyme may be used.
- the transformant grows on an agar medium to form a colony. Therefore, for example, when secretory luciferase is used as the secretory luminescent enzyme, after adding luciferin to the agar medium containing the transformant, the luminescence intensity of the colony is measured with a luminescence detector having a CCD camera, for example.
- the enzyme activity can be measured by measuring using.
- the enzyme activity value of the secretory luminescent enzyme thus obtained is correlated with the expression, function, transcriptional activity, or transcriptional control function of a foreign gene or a foreign DNA fragment.
- a simple and highly sensitive reporter assay can be performed.
- the reporter assay method according to the present invention can efficiently use a highly sensitive luminescence measurement method having a low background, it is possible to produce a trace amount of an assay system.
- a measurement sample can be prepared only by sampling a culture without collecting bacteria or disrupting cells. Therefore, automation by a robot is possible.
- the reporter assembly method enables the reporter assembly to be performed as a high throughput assembly, and further allows automatic processing using robotics.
- the reporter assay method according to the present invention, a simple quantitative evaluation of protein-protein interaction can be performed in a two-hybrid system.
- bioassays such as dioxin and environmental hormones.
- it can also be used for comprehensive screening of secretory proteins useful for drug discovery.
- yeast expressing human membrane-bound receptors and nuclear receptors and coupling these receptors with the intracellular signal transduction system of yeast, high-throughput screening of new drug lead compounds is possible.
- the conventional method can detect gene mutations, which are laborious as in one sample and one petri dish, and can simultaneously analyze 96 samples in one 96-well plate, contributing to high throughput of gene mutation analysis.
- the reporter assembly method according to the present invention is highly sensitive, scale down is possible.
- the transformed yeast according to the present invention is provided with a 1 m to 1 mm channel and a membrane filter, a narrow channel or a nanopillar that prevents the yeast from flowing out, and a chip or a capillary that is made so that only the medium flows.
- Set to. is there Alternatively, it may be a chip or a fly that allows a culture solution containing bacterial cells to flow.
- a substrate is caused to flow into the flow path with respect to the secretory luminescent enzyme released into the medium to cause an enzyme reaction.
- the reporter assay method according to the present invention can be used for on-chip analysis called ⁇ TAS (Micro total analysis systems) or Lab-on-a-chip.
- the secretory ability of the secretory signal peptide or secretory protein can be evaluated.
- a DNA in which a secretory signal peptide or a gene encoding a secreted protein is linked upstream of a gene encoding a mature protein of a secretory luminescent enzyme is introduced into the host, and based on the enzyme activity of the secretory luminescent enzyme.
- the secretory ability of the secretory signal peptide or secreted protein can be quantitatively evaluated.
- a gene encoding a secretory signal peptide or secreted protein is linked 5 ′ upstream of the gene encoding the mature protein of the secretory luminescent enzyme.
- the enzyme activity value of the obtained secretory phosphorescent enzyme can be evaluated as the relative secretory activity value of the secretory signal peptide.
- the enzyme activity value it can be evaluated that it has a function as a gene encoding a secretory signal peptide.
- the enzyme activity value of the obtained secretory luminescent enzyme can be evaluated as a relative secreted protein expression level. Alternatively, by obtaining an enzyme activity value, it can be evaluated as a gene encoding a secreted protein.
- the chemical or physical change includes, for example, detection of chemical substances or physiologically active substances, change in concentration, and change in temperature.
- DNA fragments involved in promoters responsive to these substances and transcriptional control are used as foreign DNA fragments.
- a sequence that binds to a complex of dioxin receptor and dioxin is linked to a general promoter. The exogenous DNA fragment is used. These foreign DNA fragments are linked to the secretory luminescent enzyme gene.
- a reporter assay method for detecting dioxin can be obtained by introducing the exogenous DNA fragment and a gene mutant that expresses the dioxin receptor together into a host cell.
- the concentration of dioxin can be measured by the amount of luminescence of the secretory luminescent enzyme.
- a reporter assay method for detecting a temperature change by using a protein that detects the temperature change, for example.
- a high temperature can be detected based on the activity of a secretory luminescent enzyme by using a temperature-dependent transcription factor called heat shock factor (HSF).
- HSF heat shock factor
- a promoter responsive to the above-described chemical or physical change and a DNA fragment involved in transcriptional control are used as foreign DNA fragments.
- DNA in which a secretory luminescent enzyme gene is linked to these foreign DNA fragments is introduced into a host and expressed.
- the host is then exposed to a subject of chemical or physical change.
- the activity of the secretory luminescent enzyme is measured.
- a change in the activity of the secretory luminescent enzyme compared to the negative control indicates that the expression of the foreign DNA fragment has changed in response to the test subject.
- the enzyme activity value of the secretory luminescent enzyme thus obtained can be evaluated as a relative measurement value of chemical or physical change.
- a foreign DNA fragment that interacts with a protein responsive to the above-described chemical or physical change (hereinafter referred to as “responsive protein”) is introduced into a host and expressed.
- a secretory luminescent enzyme gene is linked to the foreign DNA fragment. If the responsive protein does not exist in the host, the gene encoding the responsive protein is introduced into the host as a foreign gene and expressed. The host is then exposed to chemical or physical changes. After exposure, the activity of the secretory luminescent enzyme is measured. When the activity of the secretory luminescent enzyme changes compared to the negative control, the responsive protein detects a chemical or physical change, indicating that the interaction with the foreign DNA fragment has changed. Thus, the enzyme activity value of the obtained secretory luminescent enzyme can be evaluated as a relative measurement value of a chemical or physical change.
- an appropriate promoter, a DNA fragment involved in transcription control, or the like can be used as a foreign DNA fragment as long as the transcription amount varies.
- One or more responses as required Simultaneously express a gene encoding a response protein (for example, a receptor represented by dioxin receptor).
- a method such as using a signal transduction system possessed by the host is also used.
- a gene encoding an appropriate receptor is introduced into a host and expressed in a cell, in the nucleus, or on a cell membrane.
- a gene encoding a protein involved in an appropriate signal transduction system is expressed in the host as necessary so that when the receptor detects a chemical substance or a physiologically active substance, the signal affects the transcriptional activity.
- an appropriate DNA fragment or promoter involved in transcriptional regulation is linked as a foreign DNA fragment to the secretory luminescent enzyme gene, introduced into the host, and expressed.
- the foreign DNA fragment linked to the secretory luminescent enzyme gene may be derived from the host to be introduced, foreign, or an artificially designed sequence as long as it has a transcriptional control function! /.
- this reporter assay method can be used as a bioassay method for a large number of chemical substances or physiologically active substances.
- many receptors on cell membranes such as histamine receptors are known.
- the substance that originally binds can be identified, and the V, orphan receptor receptor can be used in combination with this reporter assay method to search for ligands that are extremely important for drug discovery. .
- this reporter assay method is suitable.
- a split assay can be performed according to the reporter assay method of the present invention. It is designed to divide the secretory luminescent enzyme into two at appropriate locations, and it is actually expressed in the host as two fragments (hereinafter referred to as “N-terminal fragment” and “C-terminal fragment”). When these two fragments are properly associated spatially, the activity of the secretory luminescent enzyme Sex is revived. In the present invention, this phenomenon is used to determine the association ability between cell membrane proteins on the cell membrane (split assembly).
- genes encoding two types of cell membrane proteins are subject to association ability determination.
- the first expression cassette is obtained by linking one cell membrane protein gene and a DNA fragment encoding the N-terminal fragment of a secretory luminescent enzyme. More specifically, the first expression cassette includes a fusion gene encoding a fusion protein in which an N-terminal fragment of a secretory luminescent enzyme is linked to the extracellular end of a cell membrane protein.
- the second expression cassette is obtained by linking the other cell membrane protein gene and a DNA fragment encoding the C-terminal fragment of the secretory luminescent enzyme. Similar to the first expression cassette, the second expression cassette contains a fusion gene encoding a fusion protein in which the C-terminal fragment of a secretory luminescent enzyme is linked to the extracellular end of a cell membrane protein.
- these two types of expression cassettes are introduced into a host to express the respective fusion genes.
- the activity of the secretory luminescent enzyme is measured.
- the enzyme activity of the secretory luminescent enzyme is obtained, it can be determined that two cell membrane proteins are associated with each other on the cell membrane.
- the enzyme activity of the secretory luminescent enzyme cannot be obtained, two cell membrane proteins do not associate with each other on the cell membrane, suggesting the possibility.
- the association ability of two kinds of cell membrane proteins can be determined.
- the ability to associate two cell wall proteins on the cell wall is determined by using a gene encoding a cell wall protein as a foreign gene instead of a cell membrane protein gene.
- Example 1 Secretion expression of Cypridina noctiluca secretory luciferase in yeast and examination of optimum pH of culture medium
- CLucJ t ⁇ Cypridina noctiluca secreted luciferase
- pcDNA-CL plasmid containing CLuc cDNA
- the secretion signal peptide of CLuc from pcDNA-CL (in the amino acid sequence of CLuc shown in SEQ ID NO: 2)
- a cDNA encoding a mature protein excluding the 18th amino acid sequence (hereinafter referred to as “mature CLuc cDNA”) was amplified by polymerase chain reaction (PCR).
- a DNA encoding a budding yeast ⁇ -factor secretion signal peptide (amino acid sequence shown in SEQ ID NO: 12) (SEQ ID NO: 11; hereinafter referred to as “ ⁇ -factor secretion signal peptide DNAJ”) is Saccharomyces cerevisiae. S288C genomic DNA (purchased from Invitrogen) was amplified as a saddle.
- the mature CLuc cDNA was linked to the ⁇ -factor secretion signal peptide DNA, and the mature CLuc having the a-factor secretion signal peptide at the N-terminus (amino acid sequence shown in SEQ ID NO: 14:
- SEQ ID NO: 13 amino acid sequence shown in SEQ ID NO: 13
- 3'Xba I-luci is the first codon ( In the CLuc amino acid sequence shown in SEQ ID NO: 2, it corresponds to the 19th amino acid) and is linked to the downstream 20 bp.
- 3'Xba I-luci is a 21 bp upstream sequence including the CLuc stop codon.
- PCR to amplify mature CLuc cDNA was performed using 300 nM of each primer, dNTP (4 types of (Mixed solution of xylonucleotide triphosphate) 200 ⁇ M, MgSO 100 ⁇ , pcDNA-C as cage
- reaction solution 50 / zl containing 10 ng of L and KOD Plus buffer (1 X) and KOD plus DNA polymerase 1U 1st step: 94 ° C for 2 minutes
- DNA fragment A The obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 1.6 kb containing mature CLuc cDNA was confirmed. In the following, this DNA fragment is called “DNA fragment A”.
- sequences of primers (5'Sma I-alpha and alpha-luci-R) for amplifying a factor secretion signal peptide DNA of Saccharomyces cerevisiae were as follows.
- 5'Sma I-alpha is 28 bp downstream including the initiation codon ATG of the ⁇ -factor secretion signal peptide, while alpha-luci-R is complementary to the above alpha-luci-F (SEQ ID NO: 16). It is an array.
- DNA fragment B The obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 250 bp containing ⁇ -factor secretion signal peptide DNA was confirmed.
- this DNA fragment is referred to as “DNA fragment B”.
- Overlap PCR is performed as a primer using 1 ⁇ l each of a PCR reaction solution containing DNA fragment A and a PCR reaction solution containing DNA fragment B diluted 100-fold each with distilled water.
- the mature CLuc cDNA was amplified under the same conditions as described above except that the annealing temperature was 50 ° C, the extension reaction time was 2 minutes, and the third step was 3 minutes.
- the obtained PCR product was purified using GenElute PCR clean-up kit (Sigma). Finally, DNA was eluted from the column of the kit with distilled water 40 ⁇ 1. This DNA was cleaved with Sma I 20 U for 18 hours in a 50 ⁇ l reaction solution. After digestion with Sma I, the DNA was purified again using the GenElute PCR clean-up kit. Finally, the column force of the kit was eluted with distilled water 40 1.
- DNA fragment C a DNA fragment in which mature CLuc cDNA was ligated downstream of the ⁇ -factor secretion signal peptide DNA was obtained.
- this DNA fragment is referred to as DNA fragment C.
- pUG «35 http: // mips. Gsf.de/proj/yeast/info/tools/hegemann/gfti.html
- pUG35-MET25 + MCS was prepared by self-circularization.
- pUG35-MET25 + MCS was cleaved with Cla I and Xho I, and a vector fragment (about 5.1 kbp) was recovered by agarose electrophoresis.
- the following oligo DNA was synthesized and annealed to prepare a linker DNA.
- MCS Linker F CCGCTCGAGCGGCCGCGAGCTCGTCGACATCGATGG (SEQ ID NO: 20)
- MCS linker R CCATCGATGTCGACGAGCTCGCGGCCGCTCGAGCGG (SEQ ID NO: 21)
- the prepared linker DNA contains a restriction enzyme site of Xhol-Notl-Sacl-Sall-Clal.
- DNA fragment D 2 ⁇ g of pUG35—MET25—EGFP3 + MCS plasmid was cleaved with Sma I 50 U in 50 ⁇ 1 reaction solution for 18 hours. After digestion with Sma I, the DNA was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 1 of distilled water using distilled water. Subsequently, the obtained DNA was cleaved with Xba I 50U in a 50 ⁇ l reaction solution for 18 hours. After digestion with Xba I, the DNA was subjected to agarose electrophoresis, and a vector fragment (about 5 kb) of the pUG35-MET25-EGFP3 + MCS plasmid was recovered. In the following, this vector fragment is referred to as DNA fragment D.
- pCLuRA plasmid
- TDH3 promoter the promoter of Saccharomyces cerevisiae TDH3 (systematic gene name: YGR192C) gene (SEQ ID NO: 22: hereinafter referred to as "TDH3 promoter") is inserted into pCLuRA 5 'upstream of the DNA encoding a CLuc. Incorporated to be located at.
- the TDH3 promoter is a 5 ′ upstream untranslated region of the TDH3 gene, that is, a region sandwiched between the TDH3 gene and the PDX1 gene, which is the 5 ′ upstream adjacent gene of the TDH3 gene (yeast genomic DNA). ⁇ Go to ⁇ Su http://www.yeastgenome.org/).
- 5'TDH3 BamHI; GGGTGGATCCCGAGTTTATCATTATCAATAC (SEQ ID NO: 23) 3'TDH3; TCGAAACTAAGTTCTTGGTG (SEQ ID NO: 24)
- the 5'TDH3_BamHl primer is upstream of the TDH3 open reading frame (ORF) 5 ' PDX1 This is a sequence in which a Bam HI restriction enzyme site is attached 5 ′ to the 21 bases 3 ′ downstream of the stop codon of ORF.
- the 3′TDH3 primer is a complementary sequence of 20 bases 5 ′ upstream from the start codon of TDH3 ORF. Please refer to the yeast genome database (http://www.yeastgenome.org/) for the positions of the primers.
- Saccharomyces cerevisiae S288C genomic DNA 1 ng was used as the saddle type, 5'TDH3_BamHI (SEQ ID NO: 23) and 3'TDH3 (SEQ ID NO: 24) were used as primers, and the annealing temperature of the second step was set.
- the conditions were basically the same as when the mature CLuc cDNA was amplified except that the temperature was 52 ° C, the extension reaction time was 30 seconds, and the third step was 1 minute.
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 650 bp was confirmed. Therefore, the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 1 of distilled water using distilled water.
- the TDH3 promoter DNA fragment thus obtained is hereinafter referred to as “DNA fragment E”.
- DNA fragment F 2 ⁇ g of pCLuRA was cleaved with Sma I 50 U for 18 hours in a 50 ⁇ 1 reaction solution. After digestion with Sma I, the DNA was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted from the same column with distilled water (40 ⁇ l). Next, the obtained DNA was cleaved with BamHI 50U in a 50 1 reaction solution for 18 hours and then subjected to agarose electrophoresis to recover a vector fragment (about 5 kb). Hereinafter, this vector fragment is referred to as “DNA fragment F”.
- DNA fragment E and DNA fragment F were ligated and circularized using DNA Ligation Kit ver.2, and then introduced into E. coli DH5a.
- the obtained transformant was cultured overnight, and then the plasmid was extracted using GenElute PI asmid MiniPrep kit. Further, by analyzing the restriction enzyme cleavage pattern and nucleotide sequence of the extracted plasmid, a transformant carrying the plasmid into which the DNA encoding the TDH3 promoter was inserted was identified.
- a plasmid (hereinafter referred to as “pC LuRA-TDH3j t”) was prepared from a transformant derived from a plasmid into which a DNA encoding the TDH3 promoter was inserted.
- Saccharomyces cerevisiae YPH500 strain was transformed with pCLuRA-TDH3.
- EZ-transformation kit (BIO 101) was used for transformation.
- the obtained transformant was synthesized from a synthetic agar medium containing no uracil (SD + KHLWade plate).
- Yeast nitrogen base without amino acids DIFCO
- glucose 0.02 m g / ml adenine sulfate, 0.02 mg / ml tryptophan, 0.02 mg / ml histidine, 0.03 mg / ml lysine, 0.03 mg / ml leucine, 1.5% agar
- Transformants harboring pCLuRA-TDH3 obtained as described above were prepared using a synthetic medium without uracil (SD + KHLWade; 0.67% Yeast nitrogen base without amino acids (DIFCO), 2% glucose, 0.02 mg / ml).
- SD + KHLWade 0.67% Yeast nitrogen base without amino acids
- DIFCO Yeast nitrogen base without amino acids
- Adenine sulfate, 0.02 mg / ml tryptophan, 0.02 mg / ml histidine, 0.03 mg / ml lysine, 0.03 mg / ml leucine (hereinafter simply referred to as “SD medium”) were inoculated and cultured at 30 ° C.
- SD media containing 100 mM potassium phosphate buffer adjusted to various pH (pH 4.0, 5.0, 6.0, 6.5) was prepared, and similarly inoculated with a transformant carrying pCLuRA-TDH3.
- the cells were cultured at ° C.
- Cypridina luciferin (substrate for luciferase) for luminescence measurement was prepared by using a 66 ⁇ or 100 ⁇ ⁇ stock solution dissolved in 50% ethanol-5 mM HC1 solution with 100 mM Tris-HCl (pH 7.4). It was diluted for use at the time of use.
- Luminescence intensity due to degradation of Cypridina luciferin by CLuc was determined by adding 80 ⁇ l of 2.5 ⁇ M Cypridina luciferin diluted solution to 20 ⁇ 1 of the culture supernatant prepared as described above, and integrating for 5 seconds. It was measured by. This measured value was divided by the absorbance at 600 ° C. of the culture solution to obtain CLuc activity corrected for the number of yeast cells. The results are shown in Figure 1.
- RLU / OD on the vertical axis is the value obtained by dividing the relative luminescence intensity of the luminometer by the absorbance at 600 nm. Moreover, the sample of a horizontal axis shows the following samples.
- the RLU / OD value of each sample is shown as an average value and a standard deviation.
- the CLuc activity in the culture supernatant was the maximum value, which was optimal.
- the CLuc activity in these culture supernatant samples was measured at pH 7.4 where the CLuc activity was maximized.
- culture conditions must be established so that the transformant (transformed yeast) grows and CLuc is not inactivated.
- the culture supernatant containing a CLuc secreted from the transformant carrying pCLuRA-TDH3 prepared in Example 1 was prepared in the same manner as in Example 1, and the pH of the medium was 6.0.
- Cypridina luciferin is used as a buffer solution of various pHs (final concentration 1 OO mM phosphate buffer (KPi) or Tris-HCl buffer (Tris-HCl)) to set the pH when measuring CLuc activity.
- KPi o mM phosphate buffer
- Tris-HCl Tris-HCl buffer
- a diluted solution diluted to 2.5 M was used.
- the Cypridina luciferin diluted solution was added 4 times the culture supernatant.
- CLuc activity was measured in the same manner as in Example 1. The results are shown in Figure 2A.
- RLU / OD on the vertical axis is the value obtained by dividing the relative luminescence intensity of the luminometer by the absorbance at 600 nm. RLU / OD values for each sample are shown as mean and standard deviation.
- SD is a sample using Cypridina luciferin diluted solution diluted with SD medium without buffer
- DDW is a sample using Cypridina luciferin diluted solution diluted with water.
- CLuc (a CLuc) was shown to change in activity depending on the salt concentration and pH of the diluted luciferin solution during activity measurement.
- the maximum CLuc activity was obtained by using a diluted luciferin solution diluted with 100 mM Tris-HCl (pH 7.0 to 8.0).
- the luciferin concentration at the time of measuring CLuc activity when secreting CLuc in yeast was examined.
- the culture supernatant containing a CLuc secreted from the transformant having pCLuRA-TDH3 prepared in Example 1 was prepared in the same manner as in Example 1, and the pH of the medium was 6.0.
- Cypridina luciferin was diluted to various concentrations with lOOmM Tris-HCl (pH 7.4) and diluted to final concentrations of 0.25, 0.5, 1.0, 2.0, and 4.0 M in the reaction solution.
- the ethanol concentration used for dissolution was adjusted to be the same as the stock solution.
- the culture supernatant of the transformant harboring pCLuRA-TDH3 was used in an SD medium containing 100 mM phosphate buffer, stepwise from the stock solution to 10 times, 100 times, 1000 times, and 10000 times. Diluted material was used. That is, assuming that the concentration of the culture supernatant stock solution is 100%, those diluted 10-fold, 100-fold, 1000-fold, and 10000-fold have a culture supernatant concentration of 10%, 1%, 0.1%, 0.01
- each plot is plotted against various final concentrations of luciferin in the reaction solution.
- the results using the culture supernatant diluted stepwise with the culture supernatant stock solution as 100% are shown.
- RLU on the vertical axis indicates the relative luminescence intensity in the luminometer.
- CLuc activity gave a concentration-response curve that conformed to the Michaelis-Menten equation. It was found that the activity reached saturation when the final concentration of luciferin in the reaction solution was about 1 ⁇ or more.
- CLuc activity was measured by adding the reaction solution so that the final concentration of luciferin was 2 ⁇ .
- each plot shows the average and standard deviation of the relative residual activity of each sample for a fixed time incubation at each temperature.
- the vertical axis represents the relative residual activity with the CLuc activity of the sample without incubation as 100%.
- CLuc activity was measured after adding 2 ⁇ 1 of chemical substances adjusted to various concentrations to 20 ⁇ 1 of the prepared culture supernatant. The result is shown in FIG.
- Fig. 6 shows the relative residual activity for various concentrations of chemical substances added to the culture supernatant.
- the relative residual activity of each sample is shown as an average and standard deviation with the CLuc activity of a sample not containing a chemical substance as 100%.
- CLuc is not a high concentration of CuSO or high concentration of ethanol.
- the production amount of CLuc depends on the promoter activity in yeast and the number of yeast cells. Therefore, in order to measure the strength of a yeast promoter using CLuc activity, it is necessary to correct the number of yeast cells. Therefore, it is possible to prepare culture solutions with various cell densities for one type of transformed yeast, measure the activity of CLuc and correct it with turbidity (600 absorbance) as an indicator of cell density. We examined whether it was possible.
- Example 1 The transformant carrying pCLuRA-TDH3 prepared in Example 1 was cultivated in the same manner as in Example 1. Culturing was performed at 30 ° C for about 48 hours, and a culture solution was obtained when the stationary phase was reached. This culture medium was diluted with a new medium from 1/100 to 1/1000, and the culture was continued again at 30 ° C for about 20 hours.
- the culture supernatant was prepared and the CLuc activity was measured according to Example 1.
- 200 1 was collected from the culture broth or culture supernatant, and the turbidity of the culture broth or culture supernatant was measured at 600 absorbance (OD) using a Tecan Sunrise Remote. The results are shown in FIGS. 7A and B.
- FIG. 7A shows the relative luminescence concentrations for various turbid culture media or culture supernatants.
- RLU on the vertical axis indicates the relative luminescence density in the luminometer.
- FIG. 7B shows the average value and standard deviation of RLU / OD for all samples of the culture solution containing the cells shown in FIG. 7A and the culture supernatant obtained by centrifugation from the culture solution.
- RLU / OD on the vertical axis is the value obtained by dividing the relative luminescence intensity of the luminometer by the absorbance at 600 nm.
- the CLuc activity is measured while all the 96 samples of CLuc activity are measured by a luminometer after collecting the culture medium. It is required that the value does not fluctuate.
- the transformant carrying pCLuRA-TDH3 prepared in Example 1 was cultured according to Example 1, and a portion of the yeast culture liquid was used. After collection (sampling), the cells were incubated at 25 ° C for 0, 10, 20, and 30 minutes. After incubation, CLuc activity was measured according to Example 1 in each culture sample. The results are shown in FIG.
- FIG. 8 shows the relative residual activity with the CLuc activity of the sample measured immediately after sampling as 100%.
- Figure 8 shows the relative residual activity of each sample as the mean and standard deviation.
- the method according to the present invention is a reporter assembly system capable of measuring high throughput.
- Example 9 Establishment of a high-throughput reporter assembly method including co-culture of CLuc-expressing yeast using 96-well deep well plates
- the transformant harboring pCLuRA-TDH3 prepared in Example 1 was cultured at 30 ° C according to Example 1 to obtain a culture solution that reached the stationary phase. After diluting this culture solution to 1/100 with fresh medium, 1 ml was inoculated into all wells of a 96-well deep well plate, and the culture was continued again at 30 ° C for approximately 16 hours. After each portion of the yeast culture is collected, it is incubated for 0, 10, 20, 30 minutes at 25 ° C. The uc activity was measured according to Example 1. The results are shown in FIG.
- Fig. 9 shows the mean value and standard deviation of RLU / OD when cultured independently in a 96-well deep well plate and measured for CLuc activity.
- RLU / OD on the vertical axis is the value obtained by dividing the relative luminescence intensity of the luminometer by the absorbance at 600 nm.
- the method according to the present invention is a reporter assembly system capable of high-throughput measurement.
- CLuc As a reporter enzyme in Saccharomyces cerevisiae, the DNA encoding CLuc was redesigned.
- the amino acid sequence of CLuc was first converted to a nucleotide sequence using the optimal codon of yeast with reference to the frequency of yeast codon usage in Akashi et al. (Genetics 164: 1291-1303 (2003)).
- the cis sequence contained in the nucleotide sequence encoding CLuc determined in this manner and possibly binding to the yeast transcription factor is downloaded from the website Yeast Promoter Database; SCPD (http://cgsigma.cshl.org Search using / jian /).
- mCLuc DNA has the same nucleotide sequence as that of CLuc (SEQ ID NO: 2), but has the same amino acid sequence as CLuc (SEQ ID NO: 2). However, in the following, the protein encoded by mCLuc DNA is referred to as “mCLuc”.
- native_signal_lF is a synthetic DNA having a length of 69 bp further 3 'including the start codon of mCLuc DNA
- CLuc_mature_lR is a synthetic DNA of the complementary strand of 7 Obp from 60 bp to 129 bp of mCLuc DNA. It is.
- the two synthetic DNAs contain a 10 bp complementary sequence.
- the DNA elongation reaction using these two synthetic DNAs consists of 3 ⁇ M of each synthetic DNA, 200 ⁇ M of dNTP (mixed solution of 4 types of deoxynucleotide triphosphates), 100 ⁇ M of MgSO
- reaction solution 50 1 containing KOD Plus Buffer (IX) and DNA polymerase 1U Using a reaction solution 50 1 containing KOD Plus Buffer (IX) and DNA polymerase 1U, 1st step: 94 ° C for 2 minutes, 2nd step: 94 ° C for 15 seconds (denaturation), 42 ° C A cycle of 30 seconds (annealing) and 30 seconds (extension) at 68 ° C was performed for 35 cycles, and the third step: 68 ° C for 1 minute.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100 times with distilled water, and this is called “DNA fragment 1”.
- CLuc_mature_2F is a synthetic DNA having a length of 70 bp from 120 bp to 189 bp of mCLuc DNA, while CLuc_mature_3R is a 70 bp from 180 bp to 249 bp of mCLuc DNA.
- Synthetic DNA of complementary strand The two synthetic DNAs contain lObp complementary sequences. The DNA elongation reaction using these two synthetic DNAs was performed under exactly the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100-fold with distilled water, and this is called “DNA fragment 2”.
- CLuc_mature_4F is a synthetic DNA having a length of 70 bp from 240 bp to 309 bp of mCLuc DNA
- CLuc-mature-5R is a synthetic DNA of a 70 bp complementary strand from 300 bp to 369 bp of mCLuc DNA.
- These two synthetic DNAs contain lObp complementary sequences. The DNA elongation reaction using these two synthetic DNAs was performed under exactly the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100-fold with distilled water, and this is called “DNA fragment 3”.
- CLuc_mature_6F is a synthetic DNA having a length of 70 bp from 360 bp to 429 bp of mCLuc DNA
- CLuc-mature-7R is a synthetic DNA of a 70 bp complementary strand from 420 bp to 489 bp of mCLuc DNA.
- These two synthetic DNAs contain lObp complementary sequences. The DNA elongation reaction using these two synthetic DNAs was performed under exactly the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100-fold with distilled water, and this is called “DNA fragment 4”.
- CLuc—mature—8F is a synthetic DNA having a length of 70 bp from 480 bp to 549 bp of mCLuc DNA
- CLuc_mature_9R is a synthetic DNA of a complementary strand of 70 bp from 540 bp to 609 bp of mCLuc DNA.
- These two synthetic DNAs contain lObp complementary sequences. The DNA elongation reaction using these two synthetic DNAs was performed under exactly the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100-fold with distilled water, and this is called “DNA fragment 5”.
- CLuc_mature_10F is a synthetic DNA having a length of 70 bp from 600 bp to 669 bp of mCLuc DNA
- CLuc_mature_llR is a synthetic DNA of a complementary strand of 70 bp of 720 bp to 789 bp of mCLuc DNA.
- These two synthetic DNAs contain an lObp complementary sequence. The DNA elongation reaction using these two synthetic DNAs was carried out under the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100-fold with distilled water, and this is called “DNA fragment 6”.
- CLuc_mature_12F is a synthetic DNA having a length of 70 bp from 720 bp to 789 bp of mCLuc DNA
- CLuc_mature_13R is a synthetic DNA of a complementary strand of 70 bp of 780 bp to 849 bp of mCLuc DNA.
- These two synthetic DNAs contain an lObp complementary sequence. The DNA elongation reaction using these two synthetic DNAs was carried out under the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100 times with distilled water, and this is called “DNA fragment 7”.
- CLuc_mature_14F is a synthetic DNA having a length of 70 bp from 840 bp to 909 bp of mCLuc DNA, while CLuc—mature—15R is a synthetic DNA of the complementary strand of 70 b P from 900 bp to 969 bp of mCLuc DNA. .
- These two synthetic DNAs contain an lObp complementary sequence. The DNA elongation reaction using these two synthetic DNAs was carried out under the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ l of distilled water using the column force of the kit. This eluate is diluted 100-fold with distilled water, and this is called “DNA fragment 8”.
- CAGAAGCAGTCCGCAGCCATTAGTATTTCC SEQ ID NO: 42
- CLuc_mature_16F is a synthetic DNA having a length of 70 bp from 960 bp to 1029 bp of mCLuc DNA
- CLuc_mature_17R is a synthetic DNA of a complementary strand of 7 Obp from 1020 bp to 1089 bp of mCLuc DNA.
- These two synthetic DNAs contain an lObp complementary sequence. The DNA elongation reaction using these two synthetic DNAs was performed under exactly the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. Dilute the eluate 100 times with distilled water. This is called “DNA fragment 9”.
- CLuc_mature_18F is a synthetic DNA having a length of 70 bp from 1080 bp to 1149 bp of mCLuc DNA
- CLuc_mature_19R is a synthetic DNA of a 70 bp complementary strand from 1140 bp to 1209 bp of mCLuc DNA.
- the two synthetic DNAs contain a 10 bp complementary sequence. The DNA elongation reaction using these two synthetic DNAs was carried out under exactly the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100 times with distilled water, and this is called “DNA fragment 10”.
- CLuc_mature_20F is a synthetic DNA having a length of 70 bp from 1200 bp to 1269 bp of mCLuc DNA
- CLuc_mature_21R is a synthetic DNA of a complementary strand of 70 bp from 1260 bp to 1329 bp of mCLuc DNA.
- the two synthetic DNAs contain a 10 bp complementary sequence. The DNA elongation reaction using these two synthetic DNAs was carried out under exactly the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100 times with distilled water and is called “DNA fragment 11”.
- CLuc_mature_22F is a synthetic DNA having a length of 70 bp from 1320 bp to 1389 bp of mCLuc DNA
- CLuc—mature—23R is a synthetic DNA of a 70 bp complementary strand from 1380 bp to 1449 bp of mCLuc DNA.
- the two synthetic DNAs contain a 10 bp complementary sequence. The DNA elongation reaction using these two synthetic DNAs was carried out under exactly the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100 times with distilled water, and this is called “DNA fragment 12”.
- CLuc_mature_24F is a synthetic DNA having a length of 70 bp from 1440 bp to 1509 bp of mCLuc DNA
- CLuc_mature_25R is a synthetic DNA of a 70 bp complementary strand from 1500 bp to 1569 bp of mCLuc DNA.
- the two synthetic DNAs contain a 10 bp complementary sequence.
- the DNA elongation reaction using these two synthetic DNAs was carried out under exactly the same conditions as the preparation of DNA fragment 1 above. [0241]
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 130 bp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ 1 of distilled water using the column force of the kit. This eluate is diluted 100-fold with distilled water, and this is called “DNA fragment 13”.
- CLuc_mature_26F is a synthetic DNA having a length of 70 bp from 1560 bp to 1629 bp of mCLuc DNA
- CLuc_mature_27R is a synthetic DNA of a 44 bp complementary strand containing a termination codon TAG from 1620 bp to 1663 bp of mCLuc DNA.
- the two synthetic DNAs contain 1 Obp of complementary sequence. The DNA elongation reaction using these two synthetic DNAs was performed under exactly the same conditions as the preparation of DNA fragment 1 above.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about lOObp was confirmed.
- the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 ⁇ l of distilled water using the column force of the kit. This eluate is diluted 100-fold with distilled water, and this is called “DNA fragment 14”.
- DNA fragments 1 to 14 obtained in the above (1) were ligated using the overlap PCR method.
- DNA fragment 1 and DNA fragment 2 were ligated by PCR using native_signal_lF (SEQ ID NO: 25) and CLuc_mature_3R (SEQ ID NO: 28) as primers.
- PCR consists of 300 nM of each primer, dNTP (mixed solution of 4 types of deoxynucleotide triphosphates) 200 ⁇ M, MgSO 100 ⁇ , and DNA fragment 1 and DNA fragment 2 as a cage 1 ⁇ 1
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 250 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 2% agarose gel, a band of about 250 bp was cut out, and a DNA fragment was extracted by a gel extraction method using phenol / chloroform. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 15”.
- DNA fragment 3 and DNA fragment 4 were ligated by PCR using CLuc_mature_4F (SEQ ID NO: 29) and CLuc_mature_7R (SEQ ID NO: 32) as primers.
- PCR using these primers was carried out under the same conditions as PCR in 2-1 above, except that 1 ⁇ l each of DNA fragment 3 and DNA fragment 4 was used as a cage.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 250 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 2% agarose gel, a band of about 250 bp was cut out, and a DNA fragment was extracted by a gel extraction method using phenol / chloroform. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 16”.
- DNA fragment 5 and DNA fragment 6 were ligated by PCR using CLuc_mature_8F (SEQ ID NO: 33) and CLuc_mature_llR (SEQ ID NO: 36) as primers.
- PCR using these primers was carried out under the same conditions as in PCR 2-1, except that 1 ⁇ l each of DNA fragment 5 and DNA fragment 6 was used as a saddle type.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 250 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 2% agarose gel, a band of about 250 bp was cut out, and a DNA fragment was extracted by a gel extraction method using phenol / chloroform. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 17”. [0257] 2-4. Ligation of DNA fragment 7 and DNA fragment 8
- DNA fragment 7 and DNA fragment 8 were ligated by PCR using CLuc_mature_12F (SEQ ID NO: 37) and CLuc_mature_15R (SEQ ID NO: 40) as primers.
- PCR using these primers was performed under the same conditions as PCR in 2-1 above, except that 1 ⁇ l each of DNA fragment 7 and DNA fragment 8 was used as a saddle type.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 250 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 2% agarose gel, and about
- DNA fragment 18 A 250 bp band was cut out, and DNA fragments were extracted by gel extraction using phenol's black mouth form. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 18”.
- DNA fragment 9 and DNA fragment 10 were ligated by PCR using CLuc_mature_16F (SEQ ID NO: 41) and CLuc_mature_19R (SEQ ID NO: 44) as primers.
- PCR using these primers was carried out under the same conditions as PCR in 2-1 above, except that 1 ⁇ l each of DNA fragment 9 and DNA fragment 10 was used as a cage.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 250 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 2% agarose gel, and about
- DNA fragment 19 A 250 bp band was cut out, and DNA fragments were extracted by gel extraction using phenol's black mouth form. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 19”.
- DNA fragment 11 and DNA fragment 12 were ligated by PCR using CLuc_mature_20F (SEQ ID NO: 45) and CLuc_mature_23R (SEQ ID NO: 48) as primers.
- PCR using these primers was carried out under the same conditions as PCR in 2-1 above, except that 1 ⁇ l each of DNA fragment 11 and DNA fragment 12 was used as a saddle type.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 250 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 2% agarose gel, and about
- DNA fragment 20 A 250 bp band was excised, and the DNA was broken by gel extraction using phenol and black mouth form. A piece was extracted. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 20”.
- DNA fragment 13 and DNA fragment 14 were ligated by PCR using CLuc_mature_24F (SEQ ID NO: 49) and CLuc_mature_27R (SEQ ID NO: 52) as primers.
- PCR using these primers was carried out under the same conditions as PCR in 2-1 above except that 1 ⁇ l each of DNA fragment 13 and DNA fragment 14 was used as a saddle type.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 230 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 2% agarose gel, and about
- DNA fragment 21 A 230 bp band was cut out, and DNA fragments were extracted by gel extraction using phenol 'Kuroguchi form. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 21”.
- DNA fragment 16 and DNA fragment 17 were ligated by PCR using CLuc_mature_4F (SEQ ID NO: 29) and CLuc_mature_llR (SEQ ID NO: 36) as primers.
- PCR using these primers was carried out under the same conditions as PCR in 2-1 above except that 1 ⁇ l each of DNA fragment 16 and DNA fragment 17 was used as a saddle type.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 490 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 2% agarose gel, and about
- DNA fragment 22 A 490 bp band was cut out, and DNA fragments were extracted by gel extraction using phenol 'Kuroguchi form. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 22”.
- DNA fragment 18 and DNA fragment 19 were ligated by PCR using CLuc_mature_12F (SEQ ID NO: 37) and CLuc_mature_19R (SEQ ID NO: 44) as primers.
- PCR using these primers was carried out under the same conditions as PCR in 2-1 above, except that 1 ⁇ l each of DNA fragment 18 and DNA fragment 19 was used as a saddle type.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a fragment of about 490 bp was confirmed. It was. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 2% agarose gel, a band of about 490 bp was cut out, and a DNA fragment was extracted by a gel extraction method using phenol's black mouth form. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 23”.
- DNA fragment 20 and DNA fragment 21 were ligated by PCR using CLuc_mature_20F (SEQ ID NO: 45) and CLuc_mature_27R (SEQ ID NO: 52) as primers.
- PCR using these primers was carried out under the same conditions as PCR in 2-1 above, except that 1 ⁇ l each of DNA fragment 20 and DNA fragment 21 was used as the saddle type.
- the obtained PCR product was analyzed by 2% agarose electrophoresis, and a DNA fragment of about 470 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 2% agarose gel, a band of about 470 bp was cut out, and a DNA fragment was extracted by a gel extraction method using phenol'clomouth form. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 24”.
- DNA fragment 15 and DNA fragment 22 were ligated by PCR using native_signal_lF (SEQ ID NO: 25) and CLuc_mature_llR (SEQ ID NO: 36) as primers.
- PCR was carried out using 300 nM of each primer, 200 ⁇ M of dNTP (mixed solution of 4 types of deoxynucleotide triphosphates), 100 ⁇ of MgSO, and DNA fragment 15 and DNA fragment 22 as a cage 1
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 730 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 1% agarose gel, a band of about 730 bp was cut out, and a DNA fragment was extracted by a gel extraction method using phenol'clomouth form. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 25”. [0281] 2-12. Ligation of DNA fragment 23 and DNA fragment 24
- DNA fragment 23 and DNA fragment 24 were ligated by PCR using CLuc_mature_12F (SEQ ID NO: 37) and CLuc_mature_27R (SEQ ID NO: 52) as primers.
- PCR using these primers was carried out under the same conditions as in PCR 2-11 above, except that 1 ⁇ l each of DNA fragment 23 and DNA fragment 24 was used as a cage.
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 950 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 1% agarose gel, and about
- DNA fragment 26 A 950 bp band was cut out, and DNA fragments were extracted by gel extraction using phenol 'Kuroguchi form. The obtained DNA fragment was dissolved in 201 distilled water and then diluted 100 times with distilled water. This is called “DNA fragment 26”.
- DNA fragment 25 and DNA fragment 26 were ligated by PCR using the following primers.
- mCLuc_3'XbaI is a sequence that includes an Xba I site on the 5 'side of a sequence complementary to 19bp 5' upstream, including the termination codon TGA of mCLuc DNA.
- PCR was performed using 300 nM of each primer, 200 ⁇ M of dNTP (mixed solution of 4 types of deoxynucleotide triphosphates), 100 ⁇ of MgSO, and DNA fragment 25 and DNA fragment 26 as a cage 1
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 1600 bp was confirmed. Subsequently, the entire amount of the obtained PCR product was electrophoresed on a 1% agarose gel, a band of about 1600 bp was cut out, and a DNA fragment was extracted by a gel extraction method using phenol's black mouth form. The obtained DNA fragment was dissolved in 201 distilled water. This is called “DNA fragment 2 7”. [0288] (3) Preparation of plasmid containing mCLuc DNA
- E. coli retaining pZErO-2-mCLuc obtained in 3-1 above was inoculated into 50 ml of a liquid medium containing LB kanamycin (50 ⁇ g / ml) and cultured with shaking at 37 ° C. for 16 hours. After completion of the culture, plasmid DNA was prepared using the GeneElute Plasmid midi prep kit according to the attached protocol, the absorbance value at OD260 nm was measured, and the DNA concentration was quantified.
- Inverse_SalI_F is a salt that matches 20 bp 3 'downstream from the position 50 bp upstream 5' from the Spe I site. It contains the base sequence, and Sal I site is attached to the 5 'side.
- Inverse_HindIII-Sal_R contains sequences complementary to the base sequence 5 bp upstream 21 bp 5 ′ upstream from the Spe I site, 5 ′ upstream 21 bp, and Hind III site and Sal I site on the 5 ′ side. Is attached.
- PCR was performed using 300 nM of each primer, dNTP (mixed solution of 4 deoxynucleotide triphosphates) 200 ⁇ M, MgSO 100 ⁇ , 5% DMSO, and pCLuRA 10 ng ⁇ KOD Plus.
- dNTP mixed solution of 4 deoxynucleotide triphosphates
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 7 kbp was confirmed.
- the resulting PCR product was purified using the GenElute PCR clean-up kit, and finally the column force DNA of the kit was eluted with distilled water 401.
- the eluted DNA solution was cleaved with Sal I 50U for 18 hours in the 50 1 reaction solution. After digestion with Sal I, purification was performed using the GenElute PCR clean-up kit. Finally, the column force of the kit was eluted with 40 1 of distilled water.
- a portion of the resulting eluate was ligated and circularized using a DNA Ligation kit, and then introduced into E. coli DH5a.
- the obtained transformant was cultured in anther culture, and then the plasmid was extracted using GenElute plasmid MiniPrep kit.
- the extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants that retained the plasmid with the target sequence added.
- This plasmid DNA was cleaved with Hind III 50U for 18 hours in a 50 ⁇ l reaction solution. After digestion with Hind III, purification was performed using the GenElute PCR clean-up kit. Finally, the column force DNA of the kit was eluted with 40 ⁇ 1 of distilled water. Then, the DNA was cleaved with Sal I 50U in a 50 1 reaction solution for 18 hours, purified using the GenElute PCR clean-up kit, and finally the DNA was eluted from the column of the kit with distilled water 40 ⁇ 1. This is called “pCLuRA + Hind Ill-Sal I DNA fragment”.
- SV40 poly (A) X2 DNA fragment a DNA fragment in which two SV40 poly (A) signals were linked in tandem (hereinafter referred to as “SV40 poly (A) X2 DNA fragment”), PCR was performed with the following two primer pairs.
- polyA—HindllL F Jijiji Chome ⁇ Chome Chome ⁇ Chome ⁇ Chome Chome ⁇ (Sequence No. 57)
- polyA_HindIII_F is a primer with a Hind III site attached to the 5 ′ side of the 20 bp sequence 3 ′ from the 5 ′ end of the SV40 poly (A) signal.
- polyA_SacII_R is a primer with a Sac II site added to the 5 'side of the sequence complementary to the 20 bp base sequence 5' to the 3 'end of the SV40 poly (A) signal.
- PCR was performed using 300 nM of each primer, dNTP (mixed solution of 4 types of deoxynucleotide triphosphates) 200 ⁇ M, 100 ⁇ of MgSO, SV40 genome DNA (manufactured by Invitrogen) 10 n
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 500 bp was confirmed.
- the resulting PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with distilled water 40 1 using the column force of the kit.
- the eluted DNA solution was cleaved in 50 1 reaction solution with Sac II 50U for 18 hours. After digestion with Sac II, purification was performed using the GenElute PCR clean-up kit. Finally, the column force of the kit was eluted with 40 1 of distilled water. This DNA fragment is called “SV40 poly (A) — 5 ′”.
- PCR was performed using the following primers.
- polyA SacII— F: Joji Doji 0 0 0 0 0 0 0 0 0 0 (SEQ ID NO: 59)
- polyA_SacII_F is a primer with a Sac I I site attached to the 5 ′ side of the 20 bp sequence 3 ′ from the 5 ′ end of the SV40 poly (A) signal.
- polyA_SalI_R is a primer in which a Sal I site is added to the 5 ′ side of a sequence complementary to the 20 bp base sequence on the 3 ′ end 5 ′ side of the SV40 03 ⁇ 4 ⁇ ) signal.
- PCR consists of 300 nM of each primer, dNTP (mixed solution of 4 types of deoxynucleotide triphosphates) 200 ⁇ M, MgSO 100 ⁇ , SV40 genome DNA (manufactured by Invitrogen) 10 n
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 500 bp was confirmed.
- the resulting PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with distilled water 40 1 using the column force of the kit.
- the eluted DNA solution was cleaved in 50 1 reaction solution with Sac II 50U for 18 hours. After digestion with Sac II, purification was performed using the GenElute PCR clean-up kit. Finally, the column force of the kit was eluted with 40 1 of distilled water. This DNA fragment is called “SV40 poly (A) — 3 ′”.
- the obtained SV40 poly (A) _5 'and SV40 poly (A) _3' were ligated using a DNA Ligation Kit. After completion of the ligation reaction, use the polyA_HindIILF primer (SEQ ID NO: 57) and polyA_SalI_R primer (SEQ ID NO: 60) in the vertical direction with 1 ⁇ 1 of the reaction product as in the above SV40 poly (A) _5 ′. PCR was performed under conditions.
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a band of about lkbp that was considered to be the target DNA fragment was confirmed. All PCR products were electrophoresed with 1% agarose, a band of about 1 kbp was cut out, and a DNA fragment was extracted by gel extraction method using phenol's black mouth form. The obtained DNA fragment was dissolved in 201 distilled water.
- This DNA fragment and the aforementioned linearized pZErO-2 plasmid 1 ⁇ l were ligated and circularized using a DNA Ligation kit, and then introduced into E. coli DH5a. After the obtained transformant was cultured for a while, the plasmid was extracted using GenElute plasmid MiniPrep kit. In addition, the extracted plasmid retains the plasmid inserted with the SV40 poly (A) X2 DNA fragment (hereinafter referred to as “pZEr ⁇ -2_SV40 poly (A) X2”) by analyzing the restriction enzyme cleavage pattern and nucleotide sequence. The transformed transformants were identified.
- the pCLuRA + Hind Ill-Sal I DNA fragment and the SV40 poly (A) X2 DNA fragment were ligated and circularized using DNA Ligation kit, and then introduced into E. coli DH5a. After the obtained transformant was cultured in a cocoon, the plasmid was extracted using GenElute plasmid MiniPrep kit. Further, the extracted plasmid was analyzed by analyzing the restriction enzyme cleavage pattern and the nucleotide sequence, and a transformant carrying the plasmid inserted with the DNA encoding the target gene was discriminated. This plasmid DNA is called “pCLuRA + SV40 poly (A) X2j”.
- X2 was cleaved with Sma I 50U for 18 hours in a 50 ⁇ l reaction solution. After digestion with Sma I, purification was performed using the GenElute PCR clean-up kit. Finally, DNA was eluted from the column of the kit with 40 1 distilled water. Next, the DNA was cut in 50 ⁇ 1 reaction solution with Xba I 50 U for 18 hours, purified using GenElute PCR clean-up kit, and finally the column force of the same kit was eluted with 40 ⁇ 1 of distilled water. .
- the above-mentioned mCLuc DNA fragment and pUG35-MET25-EGFP3 + SV40 poly (A) X2 were ligated using a DNA Ligation kit and then introduced into E. coli DH5a. After the obtained transformant was cultured in a cocoon, the plasmid was extracted using the GenElute plasmid MiniPrep kit. The extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants that had the plasmid inserted with the DNA encoding the gene of interest. The plasmid in which the mCLuc DNA fragment is inserted at the target position is called “pmCLuRA”.
- pmCLuRA was cleaved with Sma I 50U for 18 hours in a 50 ⁇ l reaction. After digestion with Sma I, purification was performed using the GenElute PCR clean-up kit. Finally, DN ⁇ was eluted from the column of the kit with 40 ⁇ l of distilled water. The DNA is then cleaved with Bam HI 50U in a 50 ⁇ 1 reaction for 18 hours, purified using the GenElute PCR clean-up kit, and finally DNA is eluted from the column with 40 ⁇ 1 of distilled water. did.
- the promoter of Saccharomyces cerevisiae ACT1 (systematic gene name: YFL039C) gene (SEQ ID NO: 61: “ACT1 promoter” and! ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ) was incorporated into pmCLuRA.
- the ACT1 promoter is an untranslated region 5 ′ upstream of the ACT1 gene, that is, a region sandwiched between the ACT1 gene and the YPT1 gene, which is 5 ′ upstream adjacent gene of the ACT1 gene (Yeast Genome Database http (See http://www.yeastgenome.org/).
- 3'ACT1 TGTTAATTCAGTAAATTTTCGATCTTG (SEQ ID NO: 63;)
- the 5′ACTl_Spe I primer is a sequence in which a Spe restriction enzyme site is added 5 ′ to 17 bases 3 ′ downstream of the stop codon of YPT1 ORF upstream of ACT1 ORF 5 ′.
- the 3′ACT1 primer is a 27-base complementary sequence 5 ′ upstream from the ACT1 0RF start codon. Please refer to the yeast genome database (http://www.yeastgenome.org/) for the location of the primer.
- PCR was performed using Saccharomyces cerevisiae S288C genomic DNA as the saddle type, 5'ACTl_Spe I (SEQ ID NO: 62) and 3'ACT1 (SEQ ID NO: 63) as primers, and the annealing temperature in the second step was 48.
- the procedure was basically the same as in the case of synthesizing the mature CLuc cDNA (Example 1) except that the elongation reaction time was 1 minute at 1 ° C. and the third step was 2 minutes.
- the obtained PCR product was analyzed by 1% agarose gel electrophoresis, and a DNA fragment of about 670 bp was confirmed. Therefore, the PCR product obtained was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 1 of distilled water using distilled water.
- the obtained DNA solution is cleaved with Spe I 50U in 50 ⁇ 1 reaction solution for 18 hours, purified using GenElute PCR clean-up kit, and finally the column force of the kit is eluted with distilled water 40 1 did.
- This DNA fragment is referred to as “ACT1 promoter DNA fragment”.
- ACT1 promoter DNA fragment and pmCLuRA Speto Sma I fragment were ligated and circularized using DNA Ligatiion kit, and then introduced into E. coli DH5a.
- the plasmid was extracted using the GenElute plasmid MiniPrep kit. Further, the extracted plasmid was subjected to analysis of restriction enzyme cleavage pattern and nucleotide sequence to identify a transformant holding the plasmid inserted with the DNA encoding the ACT1 promoter.
- a plasmid (hereinafter referred to as “pmCLuRA-ACT1” t) was prepared from a transformant having a plasmid inserted with DNA encoding the ACT1 promoter.
- the promoter of Saccharomyces cerevisiae ADH1 (systematic gene name: YOL086C) gene (SEQ ID NO: 64, hereinafter referred to as “ADH1 promoter” !!) was incorporated into pmCLuRA.
- the ADH1 promoter is an untranslated region 5 ′ upstream of the ADH1 gene, that is, a region sandwiched between the ADH1 gene and the YOL085C gene, which is a 5 ′ upstream adjacent gene of the ADH1 gene (Yeast Genome Database http : ⁇ www.yeastgenome.org/).
- the sequences of the PCR primers (5'ADHl_BamHI and 3'AD HI) for isolating the ADH1 promoter were as follows.
- 5'ADH1 BamH I: CCCAGGATCCGTATACTAGAAGAATGAGCC (SEQ ID NO: 65) 3'ADH1: TGTATATGAGATAGTTGATTGTATG (SEQ ID NO: 66)
- the 5′ADHl_Bam HI primer is a sequence in which a Bam HI restriction enzyme site is added 5 ′ to the 20 ′ base 3 ′ downstream of the termination codon of the YOL085C ORF 5 ′ upstream of the ADH1 ORF.
- the 3 ′ AD HI primer is a complementary sequence of 25 bases 5 ′ upstream from the ADH1 ORF start codon. Please refer to the yeast genome database (http://www.yeastgenome.org/) for the location of the primers.
- PCR was carried out in the above 1-2 except that 5'ADHl_Bam HI (SEQ ID NO: 65) and 3'ADH1 (SEQ ID NO: 6 6) were used as primers and the annealing temperature in the second step was 52 ° C. This was performed under basically the same conditions as when the ACT1 promoter was synthesized.
- the obtained PCR product was analyzed by 1% agarose gel electrophoresis, and a DNA fragment of about llOObp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is called “ADH1 promoter DNA fragment”.
- the ADH1 promoter DNA fragment and the pmCLuRA Bam HI-Sma I fragment were ligated and circularized using a DNA Ligation kit, and then introduced into E. coli DH5a.
- the plasmid was extracted using the GenElute plasmid MiniPrep kit. Further, the extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants that retained the plasmid inserted with the DNA encoding the ADH1 promoter. From form transformants which the DNA encoding the ADH1 promoter retains the inserted plasmid, plasmid (hereinafter, "P MCLuRA- ADH1" t, U) was prepared.
- a promoter of CYC1 (systematic gene name: YJR048) of Saccharomyces cerevisiae (SEQ ID NO: 67: hereinafter referred to as “CYC1 promoter”) was incorporated into pmCLuRA.
- CYC1 promoter is an untranslated region 5 ′ upstream of the CYC1 gene, that is, a region sandwiched between the CYC1 gene and the ANB1 gene, which is the 5 ′ upstream adjacent gene of the CYC1 gene (yeast genome database). http://www.yeastgenome.org/).
- the 5′CYCl_Bam HI primer is a sequence in which a Bam HI restriction enzyme site is added to the 5 ′ side of 20 bases 3 ′ downstream of the stop codon of ANB1 ORF upstream of CYC1 ORF 5 ′.
- the 3′CYC1 primer is a complementary sequence of 25 bases 5 ′ upstream from the CYC1 ORF start codon. Please refer to the yeast genome database (http://www.yeastgenome.org/) for the location of the primers.
- PCR was basically performed under the same conditions as those for the synthesis of the ADH1 promoter in 1-3 above, except that 5'CYCl_BamHI (SEQ ID NO: 68) and 3'CYC1 (SEQ ID NO: 69) were used as primers. I went there.
- the obtained PCR product was analyzed by 1% agarose gel electrophoresis, and a DNA fragment of about 950 bp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is called “CYC1 promoter DNA fragment”.
- the CYC1 promoter DNA fragment and the pmCLuRA Bam HI-Sma I fragment were ligated using a DNA Ligation kit and then introduced into E. coli DH5a.
- the plasmid was extracted using the GenElute plasmid MiniPrep kit. The extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants that retained the plasmid inserted with the DNA encoding the CYC1 promoter.
- P MCLuRA- CYC1 plasmid
- TEF1 promoter A promoter of Saccharomyces cerevisiae TEF1 (systematic gene name: YPR080W) gene (SEQ ID NO: 70, hereinafter referred to as “TEF1 promoter” !!) was incorporated into pmCLuRA.
- the TEF1 promoter is an untranslated region 5 ′ upstream of the TEF1 gene, that is, a region sandwiched between the TEF1 gene and the MRL1 gene, which is the 5 ′ upstream adjacent gene of the TEF1 gene (Yeast Genome Database http : //www.yeastgenome.org/).
- 5'TEF1 BamH I: CCCAGGATCCACAATGCATACTTTGTACG (SEQ ID NO: 71) 3'TEF1: TTTGTAATTAAAACTTAGATTAGATTGC (SEQ ID NO: 72)
- the 5 ′ TEFl_Bam HI primer is a sequence in which a Bam HI restriction enzyme site is added 5 ′ to TEF1 ORF 5 and 19 bases 3 ′ downstream of the termination codon of the upstream MRL1 ORF.
- the 3 ′ TEF1 primer is a complementary sequence of 28 bases 5 ′ upstream from the TEF1 ORF start codon. Please refer to the yeast genome database (http://www.yeastgenome.org/) for the location of the primer.
- PCR was performed under basically the same conditions as in the case of synthesizing the ADH1 promoter in 1-3 above, except that 5'TEFl_Bam HI (SEQ ID NO: 71) and 3'TEF1 (SEQ ID NO: 72) were used as primers. went.
- the obtained PCR product was analyzed by 1% agarose gel electrophoresis, and a DNA fragment of about 580 bp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is called “TEF1 promoter DNA fragment”.
- the TEF1 promoter DNA fragment and the pmCLuRA Bam HI-Sma I fragment were ligated using a DNA Ligation kit and then introduced into E. coli DH5a.
- the plasmid was extracted using the GenElute plasmid MiniPrep kit.
- the extracted plasmid was analyzed by restriction enzyme cleavage pattern and nucleotide sequence analysis. Transformants carrying plasmids with inserted DNA encoding the EF1 promoter were identified. From form transformants which the DNA encoding the TEF1 promoter retains the inserted plasmid, plasmid (hereinafter, "P MCLuRA- TEF1" t, U) was prepared.
- CUP1 promoter (systematic gene name: YHR053C) gene of Saccharomyces cerevisiae (SEQ ID NO: 73, hereinafter referred to as “CUP1 promoter” !) was incorporated into pmCLuRA.
- CUP1 promoter is an untranslated region 5 ′ upstream of the CUP1 gene, that is, a region sandwiched between the CUP1 gene and the YHR054C gene, which is the 5 ′ upstream adjacent gene of the CUP1 gene (Yeast Genome Database http : ⁇ www.yeastgenome.org/).
- 5'CUP1 BamH I: CCCAGGATCCTAAGCCGATCCCATTAC (selfie column number 74)
- the 5 ′ CUPl_Bam HI primer is a sequence in which a Bam HI restriction enzyme site is added to the 5 ′ side at 17 bases 3 ′ downstream of the stop codon of YHR054C ORF upstream of CUP1 ORF 5 ′.
- the 3′CUP1 primer is a complementary sequence of 30 bases 5 ′ upstream from the CUP1 ORF start codon. Refer to the yeast genome database (http://www.yeastgenome.org/) for the positions of the primers.
- PCR was performed under basically the same conditions as in the case of synthesizing the ADH1 promoter in 1-3 above, except that 5'CUPl_Bam HI (SEQ ID NO: 74) and 3'CUP1 (SEQ ID NO: 75) were used as primers. went.
- the obtained PCR product was analyzed by 1% agarose gel electrophoresis, and a DNA fragment of about 460 bp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is called “CUP1 promoter DNA fragment”.
- the CUP1 promoter DNA fragment and the pmCLuRA Bam HI-Sma I fragment were combined with DNA Liga
- the mixture was introduced into E. coli DH5a.
- the plasmid was extracted using the GenElute plasmid MiniPrep kit.
- the extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants that retained the plasmid inserted with the DNA encoding the CUP1 promoter. From form transformants which the DNA encoding the CUP1 promoter retains the inserted plasmid, plasmid (hereinafter, "P MCLuRA- CUP1" t, U) was prepared.
- the promoter of Saccharomyces cerevisiae GAL1 (systematic gene name: YBR020W) gene (SEQ ID NO: 76: “GAL1 promoter” and! ⁇ ⁇ ) was incorporated into pmCLuRA.
- the GAL1 promoter is an untranslated region 5 ′ upstream of the GAL1 gene, that is, a region sandwiched between the GAL1 gene and the GAL10 gene, which is the 5 ′ upstream adjacent gene of the GAL1 gene (Yeast Genome Database http: //www.yeastgenome.org/).
- 5'GAL1 Se I: CCCAACTAGTACGGATTAGAAGCCGCCGAG (Self column number 77) 3'GAL1: GGTTTTTTCTCCTTGACGTTAAAG (SEQ ID NO: 78)
- the 5′GALl_Spe I primer is a sequence in which a Spe restriction enzyme site is added 5 ′ to 20 bases 3 ′ downstream of the GAL1 ORF stop codon upstream of GAL1 ORF 5 ′.
- the 3′GAL1 primer is a complementary sequence 24 bases 5 ′ upstream from the GAL1 ORF start codon. Please refer to the yeast genome database (http://www.yeastgenome.org/) for the location of the primer.
- PCR was basically performed under the same conditions as those for the synthesis of the ADH1 promoter in 1-3 above, except that 5'GALl_Spe I (SEQ ID NO: 77) and 3'GAL1 (SEQ ID NO: 78) were used as primers. I went there.
- the obtained PCR product was analyzed by 1% agarose gel electrophoresis, and a DNA fragment of about 450 bp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water.
- the obtained DNA solution is cleaved with Spe I 50U for 18 hours in a 50 ⁇ 1 reaction solution and then used with the GenElute PCR clean-up kit. After purification, DNA was also eluted with 40 1 of distilled water. This DNA fragment is called “GAL1 promoter DNA fragment”.
- the GAL1 promoter DNA fragment and the pmCLuRA Spe I-Sma I fragment were ligated and circularized using a DNA Ligati on kit, and then introduced into E. coli DH5a.
- the plasmid was extracted using the GenElute plasmid MiniPrep kit. Further, the extracted plasmid was subjected to analysis of restriction enzyme cleavage pattern and nucleotide sequence to identify a transformant holding the plasmid inserted with the DNA encoding the GA L1 promoter.
- a plasmid (hereinafter referred to as “pmCLuRA-GAL1” t) was prepared from a transformant carrying a plasmid in which a DNA encoding the GAL1 promoter was inserted.
- HSP12 promoter The promoter of Saccharomyces cerevisiae HSP12 (systematic gene name: YFL014W) gene (SEQ ID NO: 79: hereinafter referred to as “HSP12 promoter” !!) was incorporated into pmCLuRA.
- HSP12 promoter is an untranslated region 5 ′ upstream of the HSP12 gene, that is, a region sandwiched between the HSP12 gene and the YFL015W-A gene, which is the 5 ′ upstream adjacent gene of the HSP12 gene (yeast genome database). http: ⁇ www.yeastgenome.org/).
- the 5'HSP12_Bam HI primer is a sequence in which a Bam HI restriction enzyme site is added to the 5 'side of 17 bases 3' downstream of the terminal codon of the YFL015W-A ORF upstream of the HSP12 ORF 5 '.
- the 3′H SP12 primer is a complementary sequence 30 bases 5 ′ upstream from the HSP12 ORF start codon. Please refer to the yeast genome database (http: ⁇ www.yeastgenome.org/) for the location of the primers.
- PCR was basically performed under the same conditions as in the case of synthesizing the ADH1 promoter in 1-3 above, except that 5'HSP12_Bam HI (SEQ ID NO: 80) and 3'HSP12 (SEQ ID NO: 81) were used as primers. I went there.
- the obtained PCR product was analyzed by 1% agarose gel electrophoresis to obtain about 610 bp of DNA. The fragment was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is called “HSP12 promoter DNA fragment”.
- the HSP12 promoter DNA fragment and the pmCLuRA Bam HI-Sma I fragment were ligated and circularized using a DNA Ligation kit, and then introduced into E. coli DH5a.
- the plasmid was extracted using the GenElute plasmid MiniPrep kit. The extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants that retained the plasmid inserted with the DNA encoding the HSP12 promoter. From form transformants which the DNA encoding the HSP12 promoter retains the inserted plasmid, plasmid (hereinafter, "P mCLuRA- HSP1 2" t, U) was prepared.
- the TDH3 promoter DNA fragment isolated in Example 1 and the pmCLuRA Bam ⁇ -SmaI fragment were ligated using a DNA Ligation kit and then introduced into E. coli DH5a.
- the obtained transformant was cultured in anther culture, and then the plasmid was extracted using the GenElute plasmid MiniPrep kit.
- the extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants carrying the plasmid inserted with the DNA encoding the TDH3 promoter.
- a plasmid (hereinafter referred to as “pmCLuRA-TDH 3 ”) was prepared from a transformant retaining a plasmid inserted with DNA encoding the TDH3 promoter.
- pmCLuRA—ACT1, pmCLuRA—ADH1, pmCLuRA—CYC1, pmCLuRA—TDH3, pmCL uRA-TEF1, pmCLuRA-CUP1, pmCLuRA-GAL1 and pmCLuRA-HSP12 did.
- EZ-transformation (BIO101) was used for transformation.
- the obtained transformant was applied to amber agar medium (SD + KHLadeW) without uracil.
- the cells were cultured at 30 ° C for 3 days.
- the mCLuc activity obtained by dividing the relative luminescence intensity by the absorbance at 600 nm means the relative value of the transcription activity of each promoter.
- FIG. 10 “cell” was measured using mCLuc activity measured using a culture solution containing yeast cells, and “sup.” was measured using a culture supernatant obtained by centrifuging the culture solution at 15,000 rpm. Shows mCLuc activity.
- Promoter (—) indicates the result of a transformant having V and plasmid containing no promoter.
- -galactosidase cDNA was prepared by PCR using the following primer.
- the LacZ_5′SmaI_F primer is a sequence in which the Sma I restriction enzyme site is attached to the 20 ′ base 3 ′ downstream of the start codon 3 ′ of the j8-galactosidase ORF.
- the LacZ_3′XbaI_R primer is a complementary sequence of 19 bases 5 ′ upstream from the end codon of j8-galactosidase ORF.
- PCR was performed using pJM133 DNA (Genes Develop., 7, 833-843 (1993) 10 ng as the saddle type, LacZ_5'SmaI_F (SEQ ID NO: 82) and LacZ_3'XbaI_R (SEQ ID NO: 83) as primers. Except for the 2 step annealing temperature of 52 ° C, the extension reaction time of 4 minutes, and the 3rd step of 8 minutes, basically the same conditions as in the case of the above mature CLuc cDNA synthesis (Example 1) were used. Line [0365] The obtained PCR product was analyzed by 1% agarose gel electrophoresis, and a DNA fragment of about 3.3 kbp was confirmed.
- the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water.
- the obtained DNA solution was cleaved with Sma I 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 1 distilled water. .
- the resulting DNA solution was digested in 50 ⁇ 1 reaction solution with Xba I 50 U for 18 hours, purified using GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 distilled water. did. This DNA fragment is called “j8-galatatosidase DNA fragment”.
- This 13-galatatosidase DNA fragment and pUG35-MET25-EGFP3 + SV40 poly (A) X2 1 ⁇ l were ligated using a DNA Ligation kit and then introduced into Escherichia coli DH5a. After the obtained transformant was cultured in a cocoon, the plasmid was extracted using the GenElute plasmid miniPrep kit. The extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants that had the plasmid inserted with the DNA encoding ⁇ -galatatosidase. A plasmid (hereinafter referred to as “pGALuRA”) was prepared from a transformant having a plasmid in which a DNA encoding ⁇ -galatatosidase was inserted.
- pGALuRA plasmid
- E. coli harboring pGALuRA was inoculated into 50 ml of a liquid medium containing LB ampicillin (50 ⁇ g / ml) and cultured with shaking at 37 ° C for 16 hours. After completion of the culture, plasmid DNA was prepared using the GenElute Plasmid midi prep kit according to the attached protocol, the absorbance value at OD260 nm was measured, and the DNA concentration was quantified.
- ACT1 promoter DNA fragment Similar to the incorporation of various promoters into pmCLuRA in (1) above, ACT1 promoter DNA fragment, ADH1 promoter DNA fragment, CYC1 promoter DNA fragment, TDH3 promoter DNA fragment, TEF1 promoter DNA fragment, CUP1 promoter DNA fragment, GAL1 promoter DNA The fragment and the HSP12 promoter DNA fragment were each incorporated into pGALu RA.
- the resulting plasmids were ⁇ pGALuRA-ACTl '', ⁇ pGALuRA-ADH1 '', ⁇ pGALuRA-CYC1 '', ⁇ pGALuRA-TDH3 '', ⁇ pGALuRA-TEF1 '', ⁇ pGALuR A-CUP1J '', ⁇ pGALuRA-GAL1 '' It is called “pGALuRA-HSP12”.
- pGALuRA—ACT1, pGALuRA—ADH1, pGALuRA—CYC1, pGALuRA—TDH3, pGAL uRA-TEF1, pGALuRA-CUP1, pGALuRA-GALl and pGALuRA-HSP12 using each of the Saccharomyces 500 did.
- EZ-transformation (BIO101) was used for transformation.
- the obtained transformant was spread on a synthetic agar medium (SD + KHLadeW) containing no uracil and cultured at 30 ° C for 3 days.
- the absorbance at 420 nm was measured. Based on the obtained value, the promoter activity was calculated by a calculation formula of OD420 X1.7 / (0.0045 X protein amount X extract amount X time). That is, j8-galactosidase activity means the relative value of transcriptional activity of each promoter.
- FIG. 11 “Promoter (—)” shows the result of a transformant having a promoter /! Plasmid.
- Example 12 Comparison of the results of reporter assembly with mCLuc and the results of intracellular mRNA measurement It was examined by quantifying the amount of mCLuc mRNA that the results of the assay using the reporter plasmid pmCLuRA in Example 11 reflected the expression level of mRNA in the cells.
- the TDH3 gene was selected as a control gene required for mRNA measurement by real-time PCR, and its ORF was cloned into pZErO-2 to serve as a control plasmid. TDH3 gene was obtained by PCR using the following primer.
- TDH3 CDS— F: ATGGTTAGAGTTGCTATTAACGGTTTCG (SEQ ID NO: 84)
- TDH3 CDS— R: TTAAGCCTTGGCAACGTGTTCAACCAAG (SEQ ID NO: 85)
- the TDH3_CDS_F primer is a 28 bp sequence 3 ′ downstream from the start codon of TDH3 ORF.
- the TDH3_CDS_R primer is a complementary sequence 28 bp 5 ′ upstream from the stop codon of TDH3 ORF.
- PCR was performed using Saccharomyces cerevisiae S288C genomic DNA lng as the vertical type, TDH3_CDS_F (SEQ ID NO: 84) and TDH3_CDS_R (SEQ ID NO: 85) as primers, and the annealing temperature of the second step at 55 ° C and extension reaction Except for the time of 1 minute and the 3rd step of 2 minutes, the procedure was basically the same as in the case of synthesizing the mature CLuc cDNA (Example 1).
- the obtained PCR product was analyzed by 1% agarose gel electrophoresis, and a DNA fragment of about lkbp was confirmed. Therefore, the PCR product obtained was purified using the GenElute PCR clean-up kit. Finally, the column force of the kit was also eluted with distilled water 40 1.
- the obtained DNA and the aforementioned linearized pZErO-2 were ligated and cyclized using a DNA Ligation kit, and then introduced into E. coli DH5a.
- the obtained transformant was cultured overnight, and then the plasmid was extracted using the GenElute plasmid MiniPrep kit.
- the extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants that retained the plasmid inserted with DNA encoding TDH3 ORF. This plasmid is called “pZEr 0-2-TDH3 ORFJ”.
- primers for real-time PCR were designed using Primer Express, a primer design software from ABI.
- the mCLuc_RT_F primer has a base sequence from 1009 bp to 1025 bp, 3 ′ downstream from the start codon of mCLuc ORF.
- the mCLuc_RT_R primer is a complementary nucleotide sequence from 1045 bp to 1066 bp, 3 ′ downstream of the starting codon force of mCLuc ORF.
- the TDH3_RT_F primer has a base sequence from 632 bp to 653 bp, 3 ′ downstream from the start codon of TDH3 ORF.
- the TDH3_RT_R primer is a complementary base sequence from 674 bp to 694 bp 3 ′ downstream from the start codon of TDH3 ORF.
- Real-time PCR was performed using a Power SYBR Green PCR Master Mix manufactured by ABI in a reaction solution of 20 ⁇ 1 (10 ⁇ 1 master mix, 50 ⁇ of each primer and 5 ng of cDNA). PCR was performed in 40 cycles of the first step: 95 ° C for 10 minutes and the second step: 95 ° C for 15 seconds (denaturation) and 60 ° C for 60 seconds (anneal extension). The results are shown in FIG. The results shown in Fig. 12 are the results of relative quantification of the amount of mCLuc mRNA using the value of the control plasmid as the internal standard. It is fruit.
- CUP1 systematic gene name: YHR053C
- YHR053C Saccharomyces cerevisiae
- the CUP1 promoter is a copper ion inducible promoter. Therefore, using p mCLuRA-CUPl, we examined whether induction of mCLuc! In addition, a similar experiment was performed using
- Saccharomyces cerevisiae GAL1 (systematic gene name: YBR020W) gene is known to induce its expression in the absence of darucose galactose (West, RWJ, et al., Mol. Cell Biol, 4: 2467-2478 (1984)). That is, the GALl promoter is a galactose inducible promoter. Therefore, we examined whether the induction was observed in mCLuc using pmCLuRA-GAL1. A similar experiment was also conducted using ⁇ -galactosidase for comparison.
- each well contains 1% 2% galactose SC + KHLadeW (SC + KHLadeW is SD + KH in Example 1) LWade excluding glucose) Inoculated into a 96-well deep well plate supplemented with 200 mM KPi synthetic liquid medium or SD + KHLadeW 2 OOmM KPi synthetic liquid medium, and cultured with shaking at 30 ° C.
- SC + KHLadeW is SD + KH in Example 1
- Example 14A 32 hours after the start of the culture, a part of the culture solution was collected, and according to the method of Example 1, the absorbance at 600 nm (OD600) and the relative luminescence intensity (RLU) of the luminometer were measured. From the obtained values, the activity of each promoter was numerically calculated in the same manner as in Example 11. As a control, a similar experiment was performed for a transformant having pmCLuRA-TDH3. The results are shown in FIG. 14A.
- a promoter of the Saccharomyces cerevisiae TDH3 (systematic gene name: YGR192C) gene has several regulatory sequences important for expression regulation in its base sequence (J BC, 1994, 269: 6153-6162). And Figure 15). Therefore, when these sequences were removed, it was examined whether the corresponding promoter activity could be detected using mCLuc.
- the TDH3 promoter (-471) is 5 'upstream from the start codon of TDH3 ORF-486 bp to-474 bp.By removing this existing Fermentable caroon source-dependent upstream activation sequence (UA Sl * l), its promoter activity is reduced. It is a promoter sequence designed to investigate how it fluctuates.
- a TDH3 promoter (-471) was obtained by PCR using the following primers and 3'TDH3 primer (SEQ ID NO: 24).
- TDH3-47LF AAGAGGATCCAATGGAGCCCGCTTTTTAAG (SEQ ID NO: 90)
- TDH3- 471_F primer is Bam from 20 bases 3 'downstream from 471 bases 5' upstream of TDH3 ORF This is a sequence with an H-restricted enzyme site added to the 5 'side. Please refer to the yeast genome database (http://www.yeastgenome.org/) for the positions of the primers!
- the obtained PCR product was analyzed by 2% agarose gel electrophoresis, and a DNA fragment of about 470 bp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is called “TDH3 promoter ( ⁇ 471) DNA fragment”.
- the TDH3 promoter (-471) DNA fragment and the pmCLuRA Bam HI-Sma I fragment were ligated and circularized using a DNA ligation kit, and then introduced into E. coli DH5a. After the obtained transformant was cultured in a cocoon, the plasmid was extracted using the GenElute plasmid MiniPrep kit. The extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants carrying the plasmid inserted with the DNA encoding the TDH3 promoter (-471). A plasmid (hereinafter referred to as “pmCLuRA-TDH3 (-471)”) was prepared from a transformant having a plasmid inserted with a DNA encoding the TDH3 promoter (-471).
- the TDH3 promoter (-423) removes the existing Fermentable caroon source-dependent upstream activation sequence (UAS1 * 2) and the above UAS1 * 1 from 5 'upstream to 448bp to 436bp from the start codon of TDH3 ORF. Thus, it is a promoter sequence designed to investigate how its promoter activity varies.
- TDH3 promoter motor (-423) was obtained by PCR using the following primers and 3'TDH3 primer (SEQ ID NO: 24).
- TDH3- 423 F: AAGAGGATCCAGAATCCCAGCACCAAAATA (SEQ ID NO: 91)
- the TDH3-423_F primer is a sequence in which a Bam H restriction enzyme site is added to the 5 ′ side of 20 bases 3 ′ downstream from the 423 bases 5 ′ upstream of the TDH3 ORF. Please refer to the yeast genome database (http://www.yeastgenome.org/) for the positions of the primers!
- PCR was performed using Saccharomyces cerevisiae S288C genomic DNA lng as the saddle type, TDH3-423_F (SEQ ID NO: 91) and 3'TDH3 (SEQ ID NO: 24) as primers, and the annealing temperature of the second step at 54 °. C. Except for the extension reaction time of 1 minute and the third step of 2 minutes, the procedure was basically the same as in the case of synthesizing the mature CLuc cDNA (Example 1).
- the obtained PCR product was analyzed by 2% agarose gel electrophoresis, and a DNA fragment of about 420 bp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is referred to as “TDH3 promoter (-423) DNA fragment”.
- the TDH3 promoter (-423) DNA fragment and the pmCLuRA Bam HI-Sma I fragment were ligated and circularized using a DNA ligation kit, and then introduced into E. coli DH5a. After the obtained transformant was cultured in a cocoon, the plasmid was extracted using the GenElute plasmid MiniPrep kit. The extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants carrying the plasmid inserted with the DNA encoding the TDH3 promoter (-423). A plasmid (hereinafter referred to as “pmCLuRA-TDH3 (-423)”) was prepared from a transformant having a plasmid inserted with DNA encoding the TDH3 promoter (-423).
- TDH3 promoter removes the existing fermentable caroon source-dependent upstream repression sequence (U RS) and the above UAS1 * 1 and UAS1 * 2 from 5 'upstream to 431bp to 419bp from the start codon of TDH3 ORF Thus, it is a promoter sequence designed to investigate how the promoter activity fluctuates.
- a TDH3 promoter motor (-411) was obtained by PCR using the following primers and 3'TDH3 primer (SEQ ID NO: 24).
- TDH3-411 F: AAGAGGATCCTGTTTTCTTCACCAACCATC (SEQ ID NO: 92)
- the TDH3-411_F primer is a sequence in which a Bam H restriction enzyme site is added to the 5 ′ side at 20 bases 3 ′ downstream from the 411 bases 5 ′ upstream of the TDH3 ORF. Please refer to the yeast genome database (http://www.yeastgenome.org/) for the positions of the primers!
- PCR was performed using Saccharomyces cerevisiae S288C genomic DNA lng as the saddle type, TDH3-411_F (SEQ ID NO: 92) and 3'TDH3 (SEQ ID NO: 24) as primers, and the annealing temperature in the second step at 54 °. C. Except for the extension reaction time of 1 minute and the third step of 2 minutes, the procedure was basically the same as in the case of synthesizing the mature CLuc cDNA (Example 1).
- the obtained PCR product was analyzed by 2% agarose gel electrophoresis, and a DNA fragment of about 410 bp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is called “TDH3 promoter ( ⁇ 411) DNA fragment”.
- the TDH3 promoter (-411) DNA fragment and the pmCLuRA Bam HI-Sma I fragment were ligated and circularized using a DNA ligation kit, and then introduced into E. coli DH5a. After the obtained transformant was cultured in a cocoon, the plasmid was extracted using the GenElute plasmid MiniPrep kit. The extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants that retained the plasmid inserted with the DNA encoding the TDH3 promoter (-411). A plasmid (hereinafter referred to as “pmCLuRA-TDH3 (-411)”) was prepared from a transformant having a plasmid inserted with DNA encoding the TDH3 promoter ( ⁇ 411).
- the TDH3 promoter (-295) is 5 'upstream from the start codon of TDH3 ORF-305 bp to 297 bp [This non- fermentable caroon source-dependent upstream activation sequenc e (UAS2) is a promoter sequence designed to investigate how the promoter activity fluctuates by removing UAS1 * 1, UAS1 * 2 and URS.
- a TDH3 promoter motor (-295) was obtained by PCR using the following primers and 3'TDH3 primer (SEQ ID NO: 24).
- TDH3- 295 F: AAGAGGATCCGGAGTAAATGATGACACAAG (ia ⁇ lJ ⁇ -93)
- the TDH3-295_F primer is a sequence in which a Bam H restriction enzyme site is added to the 5 ′ side of 20 bases 3 ′ downstream from 295 bases 5 ′ upstream of the TDH3 ORF. Please refer to the yeast genome database (http://www.yeastgenome.org/) for the positions of the primers!
- PCR was performed using Saccharomyces cerevisiae S288C genomic DNA lng as the saddle type, TDH3-295_F (SEQ ID NO: 93) and 3'TDH3 (SEQ ID NO: 24) as primers, and the annealing temperature in the second step at 54 °. C. Except for the extension reaction time of 1 minute and the third step of 2 minutes, the procedure was basically the same as in the case of synthesizing the mature CLuc cDNA (Example 1).
- the obtained PCR product was analyzed by 2% agarose gel electrophoresis, and a DNA fragment of about 290 bp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is called "TDH3 promoter (-295) DNA fragment".
- the TDH3 promoter (-295) DNA fragment and the pmCLuRA Bam HI-Sma I fragment were ligated and circularized using a DNA ligation kit, and then introduced into E. coli DH5a. After the obtained transformant was cultured in a cocoon, the plasmid was extracted using the GenElute plasmid MiniPrep kit. The extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants carrying the plasmid inserted with the DNA encoding the DH3 promoter (-295). From transformant DNA encoding the TDH3 promoter (-295) to hold the inserted plasmid, plasmid (hereinafter, "pmCLuRA- TDH 3 (- 295)" hereinafter) was made by the tone.
- the obtained transformant was applied to a synthetic agar medium (SD + KHLadeW) containing no uracil and cultured at 30 ° C for 3 days.
- the promoter of the Saccharomyces cerevisiae GAL1 (systematic gene name: YBR020W) gene has four GAL4 binding regions important for regulation of expression in the base sequence (corresponding to “GAL4” in FIG. 16).
- GAL4 GAL4 binding regions important for regulation of expression in the base sequence
- GAL1 promoter (-396) change its promoter activity by removing the GAL4 binding region that repeats 3 times from the start codon of GAL1 ORF 5 'upstream from -451 bp to -397 bp? Promoter sequence designed to investigate.
- GAL1 promoter motor (-396) was obtained by PCR using the following primers and a 3'GAL1 primer (SEQ ID NO: 78).
- GAL1- 396 F: AAGAGGATCCTGCGTCCTCGTCTTCACCGG (SEQ ID NO: 94)
- the GAL1-396_F primer is a sequence in which a Bam HI restriction enzyme site is added 5 ′ to 20 bases 3 ′ downstream of the 396 bp position 5 ′ upstream from the GAL1 ORF start codon. Please refer to the yeast genome database (http: ⁇ www.yeastgenome.org/) for the location of the primers.
- PCR was performed using Saccharomyces cerevisiae S288C genomic DNA lng as a saddle, GAL1-396_F (SEQ ID NO: 94) and 3'GAL1 (SEQ ID NO: 78) as primers, and the annealing temperature of the second step was 54 °. C. Except for the extension reaction time of 1 minute and the third step of 2 minutes, the procedure was basically the same as in the case of synthesizing the mature CLuc cDNA (Example 1).
- the obtained PCR product was analyzed by 2% agarose gel electrophoresis, and a DNA fragment of about 390 bp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is called a “GAL1 promoter ( ⁇ 396) DNA fragment”.
- the GAL1 promoter (-396) DNA fragment and the pmCLuRA Bam HI-Sma I fragment were ligated and circularized using a DNA Ligation kit, and then introduced into Escherichia coli DH5a. After the obtained transformant was cultured in a cocoon, the plasmid was extracted using the GenElute plasmid MiniPrep kit. The extracted plasmid was analyzed for restriction enzyme cleavage patterns and nucleotide sequences to identify transformants that retained the plasmid inserted with the DNA encoding the GAL1 promoter (-396).
- a plasmid (hereinafter referred to as “pmCLuRA-GAL1 (-396)”) was prepared from a transformant having a plasmid inserted with a DNA encoding the GAL1 promoter ( ⁇ 396).
- the promoter activity of the GAL1 promoter can be reduced by removing the GAL4 binding region that exists independently from -349 bp to -332 bp 5 'upstream from the start codon of the GAL1 ORF and the GAL4 binding region repeated three times above. It is a plug motor arrangement designed to investigate how it fluctuates.
- a GAL1 promoter motor (-288) was obtained by PCR using the following primers and 3'GAL1 primer (SEQ ID NO: 78).
- GAL1- 288 F: AAGAGGATCCGAAAAATTGGCAGTAACCTG (SEQ ID NO: 95)
- the GAL1-288_F primer is a sequence in which a Bam HI restriction enzyme site is added to the 5 ′ side at 20 bases 3 ′ downstream from the 288 bp position 5 ′ upstream from the GAL1 ORF start codon.
- a Bam HI restriction enzyme site is added to the 5 ′ side at 20 bases 3 ′ downstream from the 288 bp position 5 ′ upstream from the GAL1 ORF start codon.
- yeast genome database http: ⁇ www.yeastgenome.org/
- Saccharomyces cerevisiae S288C genomic DNA lng was used as the saddle type, GAL1-288_F (SEQ ID NO: 95) and 3'GAL1 (SEQ ID NO: 78) were used as primers, and the annealing temperature in the second step was 54 °. C. Except for the extension reaction time of 1 minute and the third step of 2 minutes, the procedure was basically the same as in the case of synthesizing the mature CLuc cDNA (Example 1).
- the obtained PCR product was analyzed by 2% agarose gel electrophoresis, and a DNA fragment of about 390 bp was confirmed. Therefore, the obtained PCR product was purified using GenElute PCR clean-up kit, and finally DNA was eluted with 40 1 of distilled water using distilled water. The resulting DNA solution was cleaved with Bam HI 50U for 18 hours in a 50 ⁇ 1 reaction solution, purified using the GenElute PCR clean-up kit, and finally the column force of the kit was eluted with 40 1 of distilled water. . This DNA fragment is called “GAL1 promoter ( ⁇ 288) DNA fragment”.
- the GAL1 promoter (-288) DNA fragment and the pmCLuRA Bam HI-Sma I fragment were ligated and circularized using a DNA Ligation kit, and then introduced into Escherichia coli DH5a. After the obtained transformant was cultured in a cocoon, the plasmid was extracted using the GenElute plasmid MiniPrep kit. Further, the extracted plasmid was subjected to analysis of restriction enzyme cleavage pattern and nucleotide sequence to identify transformants carrying the plasmid inserted with the DNA encoding the GAL1 promoter (-288). A plasmid (hereinafter referred to as “pmCLuRA-GAL1 (-288)”) was prepared from a transformant carrying a plasmid in which DNA encoding the GAL1 promoter ( ⁇ 288) was inserted.
- pmCLuRA-GAL1 (-396), pmCLuRA-GAL1 (-288) and pmCLuRA-GAL1 (see Fig. 16)
- the Saccharomyces cerevisiae YPH500 strain was transformed with each of the three plasmids (corresponding to “-451”).
- EZ-transformation (BIO101) was used for transformation.
- the obtained transformant was applied to a sputum synthesis agar medium (SD + KHLadeW) containing uracil and cultured at 30 ° C for 3 days.
- SD + KHLadeW sputum synthesis agar medium
- Example 11 From the obtained values, the activity of each plug motor was numerically calculated in the same manner as in Example 11. The results are shown in FIG. For comparison, the results of measurement of CLuc activity using a culture medium of a transformant having DNA encoding mCLuc linked to the TDH3 promoter are shown.
- the values measured using mCLuc as a reporter enzyme varied greatly depending on the presence or absence of a cis sequence considered to be involved in the transcriptional activity in the TDH3 promoter and GAL1 promoter.
- the correlation between the measured values of this promoter fragment and mCLuc reporter assay was in good agreement with the results described in JBC, 1994, 269: 6153-6162. From these results, it was found that the method using mCLuc as a reporter enzyme can be used in experiments for examining sequences related to transcriptional activity by sequentially shortening the same promoter as in the conventional method.
- the codon that originally encodes the amino acid is located 3 'downstream in the case of the insertion or deletion of the position or base. It may be a stop codon (called “nonsense mutation”).
- nonsense mutation a stop codon
- CLuc was used to establish a simpler and more sensitive method.
- the nucleotide sequence shown in SEQ ID NO: 97 is a sequence comprising a coding region of the third exon of the rat Apo E gene and a stop codon at the 3 'end.
- the plasmid pCLuRA prepared in Example 1 is used to connect the ⁇ -factor secretion signal peptide DNA of the DNA encoding CLuc and the mature CLuc DNA. A restriction enzyme site was introduced between them. Therefore, PCR was performed using the following primers.
- aCL_inv_5 is the Hind I 5 'side of the 28th base of the 2nd 68th base of DNA (SEQ ID NO: 13) encoding a CLuc (the first codon of mature CLuc). This is a sequence with restriction sites of II and Sph I.
- the aCL_inv_3'-Hind primer is 26 bp from the 242nd base of DNA (SEQ ID NO: 13) encoding a CLuc (26 bp from the 3 'end of a fat secretion signal peptide DNA (SEQ ID NO: 11)).
- This is a complementary sequence with 1 base G and Hind III restriction enzyme site added to its 5 'side.
- This 1-base G is a reporter plasmid that has not been homologously recombined with an exogenous DNA fragment (in the following, Apoe (+) or ApoE (-)) in the following in vivo recombination step (see below).
- PCR was performed using an aCLjnv_5, -Hind-Sph primer (SEQ ID NO: 98) and an aCLjnv_3, -Hind primer (SEQ ID NO: 99) to prepare 5% DMSO in the reaction solution.
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 7 kbp was confirmed. Therefore, the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was also eluted with distilled water 401 using the column force of the kit.
- the obtained DNA solution was cleaved with 50 U of Hind III in the 50 1 reaction solution for 18 hours, purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with distilled water 40 1 with the column strength of the kit. This DNA fragment is called “pC LuTr DNA fragment”.
- the pCLuTr DNA fragment was ligated and self-circularized using a DNA Ligation kit, and then introduced into E. coli DH5a.
- the obtained transformant was cultured overnight, and then the plasmid was extracted using the GenElute plas mid MiniPrep kit.
- the extracted plasmid was analyzed by restriction enzyme digestion pattern and nucleotide sequence analysis, and the pCLuTr DNA fragment was circulated into the plasmid. Transformants that retained the host (hereinafter referred to as “pCLuTr”) were identified.
- PCLuTr was prepared from the transformant retaining pCLuTr.
- the ApoE-aCL_gapF primer is 39 bp from the 229th base of the DNA encoding a CLuc (SEQ ID NO: 13) (39 bp from the 3 'end of the a-factor secretion signal peptide DNA (SEQ ID NO: 1 1)).
- the coding region (SEQ ID NO: 97) contained in the 3rd exon of the rat Apo E gene has 21 bp from the first base.
- the ApoE-aCL_gapR primer is 268 bp from the start codon of a CLuc ORF (lbp of the first codon of mature CLuc) 3 ′ downstream of the rat Apo E gene 3 ′ downstream of the complementary sequence 40 bp
- PCR was performed using ApoE-aCL_gapF primer (SEQ ID NO: 100) and ApoE-aCL_gapR primer. 1 (SEQ ID NO: 101), add 5% DMSO to the reaction mixture, mold 10 ng of rat genomic DNA in a cage, 1st step: 94 ° C for 2 minutes, 2nd step: 94 ° C 15 cycles (denaturation), 30 seconds at 50 ° C (single ring) and 1 minute (extension) at 68 ° C for 35 cycles, and 3rd step: 2 minutes at 68 ° C for 2 minutes
- the above-mentioned mature CLuc cDNA was synthesized under basically the same conditions as in the case of synthesis (Example 1).
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 800 bp was confirmed. Therefore, the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 1 of distilled water using distilled water. This DNA fragment was designated as “ApoE (+)”.
- ApoE- aCL gapR— NC: GAACTGTGTTTGGTGGATCAGGTTCGTAAGGACAGTCC TGTCATTGATTCTCCAGGGGCACTG (SEQ ID NO: 102)
- the ApoE-aCL_gapR_NC primer is the coding region (SEQ ID NO: 97) contained in the 3rd exon of the rat Apo E gene at the 3 ′ side of the complementary sequence from 268 bp to 3 ′ downstream 40 bp from the initiation codon of a CLuc ORF. It is a sequence to which a complementary sequence of the 704th to 726th base sequences has been added.
- PCR is the same as that of Apo E (+) except that the ApoE-aCL_gapF primer (SEQ ID NO: 100) and the ApoE-aCL_gapR_NC primer (SEQ ID NO: 102) were used.
- the obtained PCR product was analyzed by 1% agarose electrophoresis, and a DNA fragment of about 800 bp was confirmed. Therefore, the obtained PCR product was purified using the GenElute PCR clean-up kit, and finally the DNA was eluted with 40 1 of distilled water using distilled water. This DNA fragment was designated as “ApoE ( ⁇ )”.
- the obtained solutions containing Apo E (+) or Apo E (-) DNA fragments were each diluted stepwise and subjected to 1% agarose gel electrophoresis. Calculate the intensity of the band from the obtained electrophoretic image, and calculate Apo E (+) (not including the termination codon) and Apo E (-) (including the termination codon). Dilution was performed so that the DNA fragments had the same concentration. The OD 260 of the obtained diluted DNA fragment was measured, and the DNA concentration was quantified. Furthermore, Apo E (+) and Apo E (-) DNA fragments were mixed in equal amounts, respectively, and Apo E (+/-) (Apo E (+) and Apo E (-) were 1: 1). Was made.
- CLuc is secreted and has activity even when expressed as a fusion protein with a protein encoded by the third exon of the rat Apo E gene. And became a force.
- CLuc activity corrected by turbidity when using Apo E (+) was corrected by turbidity of Apo E (-) (sequence containing a stop codon).
- the CLuc activity was very small and the CLuc activity corrected for the turbidity of Apo E (+/-) showed almost half of the value of Apo E (+).
- the plasmid construction using yeast in vivo recombination used in this Example Z The yeast transformant preparation method is very simple.
- reporter assembly using CLuc the promoter, It is considered that any kind of DNA such as genes can be quickly incorporated into a reporter plasmid, and it has been shown that a reporter assembly using CLuc can be used for noise throughput.
- automation using a dispensing robot for example, Beckman BIOMEK 200 has succeeded!
- SEQ ID NO: 13 is a gene encoding a fusion protein.
- SEQ ID NO: 14 is a fusion protein.
- SEQ ID NO: 15 is a synthetic gene.
- SEQ ID NOs: 20 and 21 are oligo DNAs.
- SEQ ID Nos: 25 to 52 are synthetic DNAs.
- SEQ ID NO: 97 is the coding region for the third exon of the rat Apo E gene and a termination codon at the 3 'end.
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WO2008148519A3 (en) * | 2007-06-04 | 2009-05-22 | Lonza Biologics Plc | Mammalian expression vector with a highly efficient secretory signal sequence |
JP2009171920A (ja) * | 2008-01-28 | 2009-08-06 | Bio Regenerations:Kk | 抗癌剤のスクリーニング方法 |
JP2009207447A (ja) * | 2008-03-05 | 2009-09-17 | National Institute Of Advanced Industrial & Technology | 変異型ルシフェラーゼ |
JP2012161342A (ja) * | 2012-06-08 | 2012-08-30 | National Institute Of Advanced Industrial Science & Technology | 膜タンパク質の発現を解析するモニタータンパク質 |
JP2014101300A (ja) * | 2012-11-19 | 2014-06-05 | Chiba Univ | 脳送達用キャリアおよびその用途 |
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WO2018165594A1 (en) | 2017-03-10 | 2018-09-13 | Bolt Threads, Inc. | Compositions and methods for producing high secreted yields of recombinant proteins |
EP3592800A4 (en) | 2017-03-10 | 2021-01-06 | Bolt Threads, Inc. | COMPOSITIONS AND METHODS OF PRODUCING HIGHLY SECRETED YIELD OF RECOMBINANT PROTEIN |
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WO2008148519A3 (en) * | 2007-06-04 | 2009-05-22 | Lonza Biologics Plc | Mammalian expression vector with a highly efficient secretory signal sequence |
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JP2009171920A (ja) * | 2008-01-28 | 2009-08-06 | Bio Regenerations:Kk | 抗癌剤のスクリーニング方法 |
JP2009207447A (ja) * | 2008-03-05 | 2009-09-17 | National Institute Of Advanced Industrial & Technology | 変異型ルシフェラーゼ |
JP2012161342A (ja) * | 2012-06-08 | 2012-08-30 | National Institute Of Advanced Industrial Science & Technology | 膜タンパク質の発現を解析するモニタータンパク質 |
JP2014101300A (ja) * | 2012-11-19 | 2014-06-05 | Chiba Univ | 脳送達用キャリアおよびその用途 |
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