WO2006062169A1 - 細胞内特定領域局在化タンパク質・ペプチドをスクリーニングするシステム - Google Patents
細胞内特定領域局在化タンパク質・ペプチドをスクリーニングするシステム Download PDFInfo
- Publication number
- WO2006062169A1 WO2006062169A1 PCT/JP2005/022581 JP2005022581W WO2006062169A1 WO 2006062169 A1 WO2006062169 A1 WO 2006062169A1 JP 2005022581 W JP2005022581 W JP 2005022581W WO 2006062169 A1 WO2006062169 A1 WO 2006062169A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- protein
- reporter gene
- yeast
- fusion protein
- dna construct
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
- G01N33/6803—General methods of protein analysis not limited to specific proteins or families of proteins
- G01N33/6845—Methods of identifying protein-protein interactions in protein mixtures
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/10—Processes for the isolation, preparation or purification of DNA or RNA
- C12N15/1034—Isolating an individual clone by screening libraries
- C12N15/1086—Preparation or screening of expression libraries, e.g. reporter assays
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/635—Externally inducible repressor mediated regulation of gene expression, e.g. tetR inducible by tetracyline
-
- C—CHEMISTRY; METALLURGY
- 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
- C12Q1/02—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
Definitions
- Intracellular specific region localized protein ⁇ Peptide screening system Intracellular specific region localized protein ⁇ Peptide screening system
- the present invention is used in a method and system for screening and identifying proteins localized in specific intracellular regions of eukaryotes, and a peptide containing a signal sequence that governs their translocation, and the method and system. Concerning DNA constructs.
- Proteins migrate to specific intracellular organelles such as the cytoplasm, nucleus, and mitochondria of cells, and specific regions within cells to exert their functions. Many of these transitions are directed by intracellular organelle-specific signal sequences consisting of short peptides of less than 20 amino acids.
- Non-patent documents 1 to 3 are functional screening methods for proteins performed using yeast and mammalian cultured cells.
- a technology that uses the tetracycline rebreser 'operator system derived from Escherichia coli in yeast is a modification of the yeast two-hybrid system. It can be used for screening compounds (for example, see Non-Patent Document 4).
- Non-Patent Document 1 Ueki N., Oda T., Kondo M., Yano K., Noguchi T., Muramatsu M. Selection system for genes encoding nuclear-targeted proteins. Nat. Biotechnol. 1998 Dec; 16 (13) : 1338— 13342.
- Non-Patent Document 2 Tashiro K., Tada H “Heilker R” Shirozu M., Nakano T “Honjo T. Si gnal sequence trap: a cloning strategy for secreted proteins and type I membrane pr oteins. Science. 1993 Jul 30; 261 (5121): 600-603.
- Non-Patent Document 3 Klein RD, Gu Q., Goddard A., Rosenthal A. Selection for genes enc oding secreted proteins and receptors. Proc. Natl. Acad. Sci. USA 1996 Jul 9; 93 (14): 7108-71013.
- Non-Patent Document 4 Shih HM, Goldman PS, DeMaggio AJ, Hollenberg SM, Goodman RH, Hoekstra MF A positive genetic selection for disrupting protein-protein int eractions: identification of CREB mutations that prevent association with the coacti vator CBP. Proc. Natl Acad. Sci. USA 1996 Nov 26; 93 (24): 13896-13901. Disclosure of the Invention
- An object of the present invention is to provide a screening method and system for proteins localized in specific intracellular regions such as eukaryotic cytoplasm, intracellular organelles, nucleolus, and nuclear specific chromatin region.
- the present inventors incorporated the existing system of tetracycline rebresser (TetR) 'operator (TetOP) derived from E. coli into a yeast screening system in a specific manner, thereby identifying intracellular eukaryotic cells. It was found that it is possible to screen for proteins localized in the region. Based on the above findings, the present invention has been completed.
- TetR tetracycline rebresser
- TetOP 'operator
- the present invention provides the following.
- a DNA construct that expresses a fusion protein of a tetracycline repressor and a target protein is introduced into a yeast that expresses a reporter gene under the control of a tetracycline operator to express the fusion protein.
- a method for detecting the activity of a protein localized in a specific intracellular region other than the eukaryotic nucleoplasm which comprises detecting the expression of the reporter gene.
- [0010] 3. (1) Introducing a DNA construct expressing a fusion protein of a tetracycline repressor and a target protein into yeast that expresses a reporter gene under the control of a tetracycline operator to express the fusion protein. (2) detecting the expression of the reporter gene, and (3) recovering the DNA construct from which the expression of the reporter gene is detected. A method for obtaining a nucleic acid encoding a protein localized in a region.
- a DNA construct that expresses a fusion protein of a tetracycline repressor, a visible protein, and a target protein is introduced into a yeast that expresses a reporter gene under the control of a tetracycline operator. Expressing the fusion protein, (2) detecting the expression of the reporter gene, and (3) the ability of the DNA construct retained by the yeast in which the reporter gene was expressed.
- a DNA construct that expresses a fusion protein of a tetracycline repressor, a visualizeable protein, and a target protein is introduced into a yeast that expresses a reporter gene under the control of a tetracycline operator. Expressing the fusion protein, (2) detecting the expression of the reporter gene, and (3) the ability of the DNA construct retained by the yeast in which the reporter gene was expressed. A region is identified by detection of a visible protein, and (4) yeast power in which localization of the fusion protein in the intracellular specific region is recognized, and recovery of the DNA construct.
- a method for obtaining a nucleic acid encoding a protein localized in a region is identified by detection of a visible protein, and (4) yeast power in which localization of the fusion protein in the intracellular specific region is recognized, and recovery of the DNA construct.
- [0015] 8. (1) Yeast that expresses a reporter gene under the control of a tetracycline operator, (2) DNA construct that expresses a fusion protein of tetracycline rebresser, visualizeable protein, and target protein, (3) Means for detecting expression of the reporter gene, (4) means for identifying a specific intracellular region where the fusion protein expressed from the DNA construct is localized by detection of a visible protein, and (5) the fusion Yeast power in which localization of a protein in a specific region in a cell is recognized
- FIG. 1 is a plasmid pTet-a showing an embodiment of the present invention.
- FIG. 2 is a plasmid pTetGFP-a modified from the plasmid pTet-a showing one embodiment of the present invention.
- FIG. 3 is a plasmid pTetGFP-c modified from the plasmid pTet-a showing one embodiment of the present invention.
- FIG. 4 is a schematic diagram showing the mechanism of the screening system of the present invention.
- FIG. 5 shows an example of peptide sequences selected from the NESX library by this screening system.
- FIG. 6 Shows examples of peptide sequences selected from this 12X library by this screening system and their subcellular localization.
- a yeast that can handle a relatively large library size and that can be easily screened is used, and the endogenous intracellular translocation activity of the yeast is utilized. Fine Since the transition to a specific region in the vesicle is a mechanism conserved in all eukaryotes, it can handle protein libraries of all eukaryotes.
- the basic principle of the present invention is that the existing system of tetracycline rebresser (TetR) 'operator (TetOP) derived from E. coli is incorporated into a yeast screening system and transferred to a specific intracellular region other than the nucleus of TetR. The target protein is detected and screened using the activity of the associated reporter gene as an index.
- TetR tetracycline rebresser
- TetOP tetracycline rebresser
- TetOP When TetOP is incorporated into the promoter of the reporter gene, the expression of the reporter gene is maintained in a suppressed state by binding to TetR force TetOP.
- TetR TetR force TetOP.
- a protein is fused with TetR and expressed, if this protein contains an activity that promotes translocation to a specific region in the cell, the nuclear abundance of this TetR fusion protein will decrease.
- the TetR fusion protein cannot bind to TetOP and induces expression of the reporter gene.
- yeast is selected using the expression of this reporter gene as an index.
- the detection method of the present invention includes (1) introducing a DNA construct that expresses a fusion protein of a tetracycline repressor and a target protein into a yeast that expresses a reporter gene under the control of a tetracycline operator. And (2) detecting the expression of the reporter gene.
- the yeast used in the present invention expresses a reporter gene under the control of a tetracycline operator.
- the yeast may be a commonly used yeast without particular limitations.
- the reporter gene may be any gene that functions in yeast.
- a gene used as a selection marker can be used.
- auxotrophic selection markers such as HIS3, L EU2, TRP1, URA3, ADE2, YAP1, AUR1-C (a marker gene contained in pAUR plasmids sold by TAKA RA), Zeocin (Invitrogen) And drug resistance markers, such as those included in pHybLex / Zeo plasmids!
- Yeast that expresses a reporter gene under the control of a tetracycline operator can be obtained by ordinary genetic engineering techniques. In other words, put a tetracycline operator into the promoter of the reporter gene.
- the DNA construct used in the present invention expresses a fusion protein of a tetracycline repressor and a target protein.
- a DNA construct is usually a vector or plasmid that can be replicated in yeast, and contains the replication control region (also called the replication origin) necessary for plasmid replication in yeast (eg, 2 ⁇ ori, ARS, CEN, etc.). Have.
- a DNA construct can be obtained by modifying a vector used in yeast so as to express a fusion protein of a tetracycline repressor and a target protein by a conventional genetic engineering technique.
- Representative vectors include YEp, YRP, and YCP vectors.
- the promoter and terminator used for expression are not limited as long as they function in yeast. Either the tetracycline libresser or the target protein may be located at the N-terminus.
- the DNA construct preferably further has a selection marker in yeast. This allows selection of yeast that retains the DNA construct. Examples of the selectable marker include those similar to the above reporter gene, and those different from the reporter gene are used. When the DNA construct has a selectable marker gene, a yeast lacking the marker gene is used.
- the DNA construct is preferably a shuttle vector that can be cloned between yeast and E. coli.
- examples of the replication control region necessary for plasmid replication in E. coli include ColEl ori.
- Examples that preferably have a selectable marker in E. coli include ampicillin resistance gene, kanamycin resistance gene, and noidalomycin resistance gene.
- a nuclear translocation signal is included in the fusion protein.
- nuclear translocation signals include those derived from Xenopus nucleoplasmin (KRPAATKKAGQAKKKK (SEQ ID NO: 61)), those derived from human cMyc ⁇ ! 1 ⁇ 1 and 0 (SEQ ID NO: 62)), artificial Sequence (KRKRY (SEQ ID NO: 63)) and the like.
- the position to include the nuclear translocation signal is the nuclear translocation signal. N-terminal, C-terminal, tetracycline rebresser and target protein may be selected.
- the expression of the reporter gene can be detected by a method suitable for the reporter gene.
- a typical method for detecting the expression of a reporter gene is as follows.
- TRP1 Presence or absence of growth in cultures lacking tributophan
- a protein other than the eukaryotic nucleoplasm is detected. Proteins that localize in specific intracellular regions can be screened. Further, by recovering the DNA construct from the yeast in which the expression of the reporter gene is detected, a protein that is localized in a specific intracellular region other than the eukaryotic nucleoplasm can be obtained.
- the tetracycline rebresser and the library protein become a fusion protein. It is preferable to use a DNA construct having a site that can be cleaved by a restriction enzyme such as a multicloning site, which incorporates a tetracycline repressor gene and DNA encoding a library protein.
- the visible protein is not particularly limited as long as it can be visualized, and includes a protein that can be stained and a fluorescent or luminescent protein. It is preferable to use it.
- a protein that exhibits fluorescence or luminescence is green fluorescent protein (GFP).
- the visible protein can be detected by a method selected depending on the visible protein. For example, in the case of GFP, it can be detected by a fluorescence microscope.
- the reporter gene When identifying a specific intracellular region in which the fusion protein expressed from the DNA construct retained by the yeast in which the reporter gene is expressed is localized by detecting a visible protein, the reporter gene
- the specific region in the cell where the fusion protein is localized in the yeast in which expression is detected may be identified by detection of a visible protein, or a DNA construct may be obtained from the yeast in which expression of the reporter gene is detected.
- the recovered DNA construct may be recovered and introduced into yeast to express the fusion protein, and a specific intracellular region where the fusion protein is localized may be identified by detecting a visible protein.
- the yeast to be reintroduced may not be one that expresses the reporter gene, but when the DNA construct has a selection marker, it is preferable that the yeast or culture conditions to be used correspond to the selection marker.
- the present invention also provides the following system for performing the above method.
- a yeast that expresses a reporter gene under the control of a tetracycline operator
- a DNA construct that expresses a fusion protein of a tetracycline repressor and a target protein
- the reporter gene A system that detects the activity of a protein to localize to a specific intracellular region other than the eukaryotic nucleoplasm, including means for detecting expression
- a yeast that expresses a reporter gene under the control of a tetracycline operator (2) a DNA construct that expresses a fusion protein of a tetracycline repressor, a visualizeable protein, and a target protein, (3) Means for detecting the expression of a reporter gene, (4) means for identifying a specific intracellular region in which the fusion protein expressed from the DNA construct is localized by detection of a visible protein, and (5) of the fusion protein
- a method for detecting the activity of a protein to localize to a specific region in a eukaryotic cell including means for recovering the DNA construct from a yeast that has been localized to the specific region in a cell. Stem.
- yeast of (1) and the DNA construct of (2) are as described for the method.
- means for detecting the expression of the reporter gene means known for reporter gene detection are appropriately selected depending on the type of the reporter gene. For example, when the reporter gene is the HIS3 gene, a medium lacking histidine can be mentioned.
- a means known for detection of a visible protein is appropriately selected according to the type of the visible protein. For example, in the case of GFP, which can be visualized, a fluorescent microscope is used.
- Means for constructing a DNA construct is appropriately selected from means known for recovery of DNA constructs such as yeast strain.
- means known for recovery of DNA constructs such as yeast strain.
- FIGS. Several examples of DNA constructs related to TetR expression are shown schematically in FIGS. These are plasmids constructed based on a cloning vector pGAD424 (BD Biosciences, Genbank accession no. U07647) that can be selected between budding yeast and E. coli.
- a DNA fragment from promoter 1 (1) to terminator 1 (4) is inserted between two Hindlll restriction enzyme sites present in the pGAD424 plasmid. Therefore, the selection marker LEU2 (7) in yeast, the selection marker amp f (9) in E. coli, the plasmid replication control region 2 ori (10) in yeast, and the plasmid replication control region ColEl ori (8) in E. coli
- the base vector is not limited to the pGAD424 vector as long as it is a shuttle vector that can be cloned by yeast and E. coli.
- TetR TetR of E. coli in yeast.
- TetR gene (2) Genbank accession no. AJ307714
- Tefl elongation factor 1-a gene promoter of budding yeast (1)
- the terminator for bp the alcohol dehydrogenase (adhl) gene terminator (4) derived from the PGAD424 vector is used.
- the promoter and terminator function in yeast. If it is, it will not be limited to the above.
- FIG. 1 schematically shows the most basic DNA construct (pTet-a) of the present invention.
- the TetR gene has a stop codon removed and a cloning site (MCS) (3) containing Spel, BamHI and Sad restriction enzyme sites at its 3 'end. Between the BamHI restriction site and the Sad restriction site, stop codons corresponding to three reading frames are arranged.
- MCS cloning site
- TetR Since the molecular weight of TetR is as small as about 23 KDa, the nuclear pore is also transferred into the nucleus by diffusion, and can bind to its own binding DNA sequence, TetOP. Therefore, a library that can be applied to screening using this plasmid is limited to a DNA library that encodes a peptide having a small molecular weight. This is because, when inserting cDNA that encodes a large protein, the expressed TetR fusion protein is inhibited from entering the nucleus by diffusion.
- a cDNA library can be inserted and used for screening.
- the cloning site 3 is defined as the Pte fl promoter (1) and the TetR gene (2 ), And insert the DNA library for screening.
- FIG. 3 is a schematic diagram of a plasmid (pTetGFP-a).
- the GFP cDNA used for the construction of this plasmid is sGFP (Chiu W., Niwa Y., Zeng W., Hirano T., Kobayashi) modified from GFP (Genbank accession no. M6z6o3) derived from Aequorea victoria. H., Sheen J. Engine GFP as a vital reporter in plants. Curr. Biol.
- a DNA fragment encoding the nuclear translocation signal (5) is inserted between the TetR gene (2) and the GFP cDNA (6). For this reason, the TetR-NLS-GFP fusion protein is actively translocated into the nucleus.
- the sequence used for the nuclear translocation signal can be any nuclear translocation signal sequence derived from SV40 large T antigen (PKKKRKV (SEQ ID NO: 51)). Any peptide and protein can induce nuclear translocation. It does not matter.
- TetR-NLS-GFP fusion protein By adding GFP to TetR as a visible protein, a new protein is fused to the TetR-NLS-GFP fusion protein, which is originally localized in the nucleus.
- the screening operation can be performed while confirming whether the local localization changes.
- the plasmid shown in Fig. 2 is constructed so that a protein from the library is fused and expressed at the C-terminus of the TetR-GFP fusion protein.
- the cloning site (3) is transferred between the Ptefl promoter (1) and the TetR gene (2), and a DNA library is inserted and used. Applicable to screening of proteins containing a null sequence.
- pTetGF-c is a modified version of the LEU2 marker gene of plasmid pTetGF-a so that it is expressed in the form of a TetR-GFP-LEU2 fusion protein.
- the schematic diagram is shown in Fig. 3. .
- the LEU2 protein coding region 7 prepared using PCR was inserted into the 3, terminus of the GFP coding region (6) of the pTetGF-a plasmid from which the LEU2 marker gene had been previously removed by EcoRV and PvuII restriction enzyme treatment. ing.
- the inserted LEU2 coding region (7) does not contain a stop codon, and the 3 ′ end is provided with the same cloning site (3) as the above plasmid.
- the marker gene fused downstream of the GFP coding region is not limited to LEU2 as long as it is derived from a marker gene that can be selected in yeast! [0059]
- the same cloning site as the plasmid (3) is transferred between the Ptefl promoter (1) and the TetR gene (2), and the DNA library is inserted and used, so that it is located at the N-terminal of the protein. Applicable to screening of functioning signal sequences and proteins containing signal sequences.
- pG BT9 BD Biosciences, Genbank accession no. U07646
- the DNA fragment sandwiched between the Aatll restriction site and Sphi restriction site was exchanged with the HIS3 gene (Genbank accession no. X03245) of budding yeast. is doing.
- the HIS3 gene In this plasmid, 2 ori, the replication region in yeast, has been removed, so this vector is used as a yeast chromosome insertion plasmid.
- the HIS3 gene consists of a promoter region from the transcription start point to upstream-292, a protein coding region, and a terminator region from the translation stop codon to 201 bp downstream.
- the TISOP array (5, -ACTCTATCATTG ATAGAGT-3, (SEQ ID NO: 60)) is inserted into the HIS3 plug motor at two positions, -22 and -53, sandwiching the TATA box!
- TetR A fusion protein (11) is expressed.
- the TetR fusion protein is actively transported into the nucleus (14) by the force of translocation into the nucleus (14) or by the action of a vector-encoded nuclear translocation signal.
- the yeast cell of the host into which the plasmid is introduced has a mutation in a gene related to auxotrophy used as a reporter and plasmid selection marker gene, and does not grow on a minimal medium unless the reporter and plasmid selection marker gene function. Use possible stocks. Furthermore, the yeast strain used is in the state of being integrated on the HIS3 reporter gene (13) force chromosome in which TetOP (12) is inserted into the promoter region.
- TetR fusion protein (11) strongly binds to TetOP (12) and HIS3 repo Because it suppresses the expression of the one-ter gene (13), it cannot grow on yeast minimal medium lacking histidine.
- the proteins and peptides fused to TetR contain a sequence that promotes the transition to a region other than the nucleus, that is, the transition to a specific intracellular region, the TetR fusion protein present in the nucleus The amount decreases.
- the amount of TetR fusion protein that can bind to TetOP also decreases, leading to expression of the HIS3 reporter gene. Therefore, yeast cells having such clones can form colonies on a minimal medium lacking histidine.
- TetR binds to tetracycline, thereby reducing its binding affinity to TetOP. Therefore, the suppression level of the reporter gene can be regulated by adding an appropriate amount of tetracycline and similar compounds to the medium. it can. By this operation, the selection pressure of the screening can be adjusted flexibly.
- proteins localized in specific intracellular regions can be detected and screened from protein and peptide libraries.
- the present invention is not limited to the above-described embodiment, and various other configurations can be adopted without departing from the gist of the present invention.
- a plasmid pTetGFP-a designed to express E. coli TetR in yeast was constructed.
- the structure of plasmid pTetGFP-a is shown in FIG.
- the pGAD424 vector cleaved with the restriction enzyme Hindlll and dephosphorylated was added to the translation start point of the budding yeast elongation factor 1-a (TEF1) gene promoter (1) (Genbank accession no. M10992). A DNA fragment containing 480 bp upstream was inserted.
- This promoter fragment Ptefl (1) is a specific primer (5'-GAGAGGAGAA AAGCTTTTCGAGGACCGCGA ATCCTTAC-3, (SEQ ID NO: 47), 5'-GAGAGGAGAA AAGCTTGAGCTCGGTACC CTCGAGTTTGTAATTAAAACTTAGATTAGATTGCTATGC-3 '(SEQ ID NO: 48)), and a DNA fragment obtained by PCR using budding yeast chromosomal DNA as a saddle, It was cut with Hindlll. The obtained plasmid was cut with restriction enzymes Xhol and Sad, and the TetR gene (2) (Genbank accession no. AJ307714) was inserted.
- TetR gene (2) DNA fragment using specific primer (5 GAGAGGAGAACTCGAGGCCATGGGTTC TAGATTAGATAAAAGTAAA GTG-3, (SEQ ID NO: 49), 5'-GAGAGGAGAAGAGCT CTTAGGATCCACTAGTTCTAGAAGACCC ACTTTCACATTTAAG-3 '(SEQ ID NO: 50))
- a DNA fragment obtained by PCR using Escherichia coli genomic DNA as a saddle type was cleaved with restriction enzymes Xhol and Sad.
- the resulting plasmid was cleaved with restriction enzymes Spel and Sad, and a DNA fragment encoding the nuclear translocation signal sequence (PKKKRKV (SEQ ID NO: 51)) (5) derived from SV40 large T antigen was attached to the 5 'end.
- GFP cD NA (6) was inserted.
- the inserted GFP cDNA (6) is sGFP (Chiu W., Niwa Y., Zen g W., Hirano T., Kobayashi H.) modified from GFP (Genbank accession no. M62653) derived from Aequorea victoria. , Sheen J. Engineered GFP as a vital reporter in plant s. Curr. Biol. 1996 Mar 1; 6 (3): 325-330.)
- CCTTGTACAGCTCGTCCATG-3 ′ (SEQ ID NO: 53) was used to cleave a DNA fragment obtained by PCR using sGFP cDNA as a saddle with restriction enzymes Nhel and Sad.
- Primer A contains a sequence encoding the N-terminus of sGFP and a DNA sequence encoding a nuclear translocation signal sequence at its 5 ′ end.
- Primer B also contains a sequence encoding the C terminus of sGFP from which the stop codon has been removed, and a Spel, BamHI and Sad restriction enzyme site at the 5 'end. The nucleotide sequences of all DNA fragments prepared by PCR have been confirmed by sequencing.
- the plasmid pTetGFP-a constructed through the above steps has a Ptefl promoter (1) and TetR gene (2) between the two Hindlll restriction enzyme sites present in the pGAD424 plasmid.
- a nuclear localization signal sequence (5), a GFP cDNA (6), a cloning site (3) containing a Spel and BamHI restriction enzyme site are arranged in this order.
- an alcohol dehydrogenase (adhl) gene terminator (4) derived from the pGAD424 vector is arranged downstream of the crawling site.
- LEU2 (7), a selection marker in yeast, selection marker amp 1 "(9) in E. coli, plasmid replication control region 2 ori (lO) in yeast, and plasmid replication control region ColEl ori (8) in E. coli PGAD424 originally exists.
- a library was prepared by inserting the synthetic DNA encoding the peptide into the pTetGFP-a plasmid prepared above.
- the synthetic DNA used was composed of two types of sequences containing arbitrary bases. One is of the type intended to express in yeast a 12X, 12 random amino acid sequence containing 36 consecutive arbitrary bases. When this random peptide sequence contains sequences that promote migration to a specific intracellular region, it was expected that these sequences could be cloned by this screening system.
- Another type is a known consensus sequence of a nuclear export signal ⁇ L X X X (L / I / F / M / V) X X L X (L / I); X represents an arbitrary amino acid.
- NESX encoding SEQ ID NO: 54 ⁇ , whose base sequence is 5,-CTC NNN NNN NNN NT (G / C) NNN NNN CTC NNN (A / C) T C-3, (SEQ ID NO: 55) there were. It was expected that the TetR-GFP fusion protein was excreted into the nuclear cytoplasm by the action of the nuclear export signal, and that this screening system could extract a sequence with true nuclear export activity.
- sequence 5'-AGAGCCATCT AGAAACTTTGAGAAGGAGAATACCATG-3 '(SEQ ID NO: 56) containing the Xbal restriction enzyme site was added to the 5' end side of these sequences, and the BamHI restriction enzyme site and the 3 'end side were added.
- sequence 5,-GACTACAAGGACGATGACGACAAGGGATCCGGTCAAA-3 '(sequence number 58), which encodes the FLAG tag (DYKDDDDK (sequence number 57)) was added.
- PCR was performed using NESX synthetic oligonucleotides in a cage. Digest the amplified DNA fragment with Xbal and BamHI Thereafter, purification was performed and the product was inserted into the Spel-BamHI site of the pTetGFP-a vector.
- a DNA construct in which the TetOP sequence was incorporated into the HIS3 gene promoter region was prepared as follows.
- pGBT9 BD Biosciences, Genbank accession no. U0764o
- the DNA fragment sandwiched between the Aatll restriction site and the Sph restriction site was exchanged with the HIS3 gene of budding yeast (Gen bank accession no. X03245). It consists of a promoter region from the transcription start point to upstream-292, a protein coding region, and a terminator region from the translation termination codon to 201 bp downstream, but the HIS3 promoter has positions -2 2 and -53.
- TetOP sequence (5'-ACTCTATCATTGATAGAGT-3 '(SEQ ID NO: 60)) was inserted across the TATA box at two sites. This plasmid had the 2 ori replication region in yeast removed. This DNA construct was used as a yeast chromosome insertion plasmid.
- the obtained plasmid was cleaved with PvuII and introduced into budding yeast SFY526 (BD Biosciences) to obtain a HIS3 reporter gene recombinant yeast strain.
- This yeast strain was confirmed to be unable to grow on SD basic medium lacking histidine by introducing the pTetGF-a plasmid, which had grown on SD basic medium lacking histidine.
- the yeast strain incorporating the HIS3 reporter gene is cultured in 100 ml of YPD liquid medium until 0 D reaches about 1.0, and 30 ⁇ g of the library plasmid is used for the lithium acetate method.
- the yeast was transformed by Yeast cells into which the plasmid had been introduced were cultured at 30 ° C. for 5 days using SD agar medium lacking leucine and histidine. The resulting colonies were collected and collected, and the extracted plasmid was transformed into E. coli. A plasmid was also prepared for this E. coli force, sequence analysis was performed, and the plasmid was reintroduced into yeast (budding yeast SFY526), and the intracellular localization of the TetR-GFP fusion protein was confirmed by GFP fluorescence observation. Similarly, the library plasmid before screening was reintroduced into yeast and observed for GFP fluorescence.
- the fluorescence of the TetR-GFP fusion protein spread to the cytoplasm or the whole cell in most cells. This indicates that most of the plasmids selected from the library by screening contain sequences with nuclear export activity and that the screening system is functioning effectively.
- This example can screen and identify many types of intracellular signal and protein by using the screening system according to the present invention. It shows that.
- a protein localized in a specific intracellular region can be detected and screened from a protein library.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Genetics & Genomics (AREA)
- Organic Chemistry (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Zoology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Wood Science & Technology (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Biophysics (AREA)
- Microbiology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Immunology (AREA)
- Hematology (AREA)
- Plant Pathology (AREA)
- Analytical Chemistry (AREA)
- Bioinformatics & Computational Biology (AREA)
- Urology & Nephrology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Cell Biology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006546756A JPWO2006062169A1 (ja) | 2004-12-08 | 2005-12-08 | 細胞内特定領域局在化タンパク質・ペプチドをスクリーニングするシステム |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004355944 | 2004-12-08 | ||
JP2004-355944 | 2004-12-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006062169A1 true WO2006062169A1 (ja) | 2006-06-15 |
Family
ID=36577992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/022581 WO2006062169A1 (ja) | 2004-12-08 | 2005-12-08 | 細胞内特定領域局在化タンパク質・ペプチドをスクリーニングするシステム |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPWO2006062169A1 (ja) |
WO (1) | WO2006062169A1 (ja) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001522598A (ja) * | 1997-11-10 | 2001-11-20 | ザ ジュネラル ホスピタル コーポレーション | タンパク質相互作用を記録するための検出システムおよび機能的関係 |
WO2002050259A2 (en) * | 2000-12-18 | 2002-06-27 | National Research Council Of Canada | Compositions, methods and kits for identifying protein-protein interaction disrupting agents |
-
2005
- 2005-12-08 JP JP2006546756A patent/JPWO2006062169A1/ja active Pending
- 2005-12-08 WO PCT/JP2005/022581 patent/WO2006062169A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001522598A (ja) * | 1997-11-10 | 2001-11-20 | ザ ジュネラル ホスピタル コーポレーション | タンパク質相互作用を記録するための検出システムおよび機能的関係 |
WO2002050259A2 (en) * | 2000-12-18 | 2002-06-27 | National Research Council Of Canada | Compositions, methods and kits for identifying protein-protein interaction disrupting agents |
Non-Patent Citations (1)
Title |
---|
SHIH H M ET AL: "A positive genetic selection for disrupting protein-protein interactions: identification of CREB mutations that prevent association with the coactivator CBP.", PROC NATL ACAD SCO USA., vol. 93, no. 24, 1996, pages 13896 - 13901, XP002916531 * |
Also Published As
Publication number | Publication date |
---|---|
JPWO2006062169A1 (ja) | 2008-06-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Wang et al. | Transcriptional repression in Saccharomyces cerevisiae by a SIN3-LexA fusion protein | |
Jansen et al. | Drag&Drop cloning in yeast | |
Bouley et al. | The PDZ domain of OutC and the N-terminal region of OutD determine the secretion specificity of the type II out pathway of Erwinia chrysanthemi | |
JP2001512684A (ja) | 新規のpichiapastoris遺伝子配列およびそれらの使用方法 | |
JP7521028B2 (ja) | 標的タンパク質への検出可能なタグのCRISPR/Cas制御組み込みに基づく細胞の選択方法 | |
EP2268810B1 (en) | Method of modifying target region in host dna and selectable marker cassette | |
WO2008049837A2 (en) | Improved alpha factor signal peptide for producing a polypeptide | |
Annilo et al. | Nuclear import and nucleolar accumulation of the human ribosomal protein S7 depends on both a minimal nuclear localization sequence and an adjacent basic region | |
EP1098987B1 (en) | Method for transformation of animal cells | |
WO2021110119A1 (zh) | 一种高活性转座酶及其应用 | |
Rutgers et al. | In vivo and in vitro analysis of structure-function relationships in ribosomal protein L25 from Saccharomyces cerevisiae | |
JP3689920B2 (ja) | マルチクローニングベクター、発現ベクター、および異種蛋白質の生産 | |
Fahrenkrog et al. | The yeast nucleoporin Nup53p specifically interacts with Nic96p and is directly involved in nuclear protein import | |
Mereshchuk et al. | The yeast 2-micron plasmid Rep2 protein has Rep1-independent partitioning function | |
WO2006062169A1 (ja) | 細胞内特定領域局在化タンパク質・ペプチドをスクリーニングするシステム | |
Nika et al. | Ribosomal protein L9 is the product of GRC5, a homolog of the putative tumor suppressor QM in S. cerevisiae | |
US9611486B2 (en) | Constructs and method for regulating gene expression or for detecting and controlling a DNA locus in eukaryotes | |
WO2015163745A1 (ko) | 바코드 이동 분석을 위한 이중 리포터 시스템을 보유한 효모 균주 | |
JP2004538002A (ja) | 停止コドン抑制による組み換え遺伝子発現の新規方法 | |
Tai et al. | AtBS14a and AtBS14b, two Bet1/Sft1‐like SNAREs from Arabidopsis thaliana that complement mutations in the yeast SFT1 gene1 | |
Stearman et al. | YIpDCE1–an integrating plasmid for dual constitutive expression in yeast | |
KR101692966B1 (ko) | 세포벽 결함 효모 변이주를 이용한 재조합 단백질 분비능이 향상된 효모 균주의 스크리닝 방법 | |
EP3027752B1 (en) | Signal sequence for protein expression in pichia pastoris | |
KR100631484B1 (ko) | Plk1(Polo-like kinase) C-말단 유래펩타이드 및 이를 이용한 Plk1 타겟 단백질의 스크리닝방법 | |
Nonaka et al. | Marker-free Insertion of a Series of C-terminal Epitopes Based on the 50: 50 Method in Saccharomyces cerevisiae |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KN KP KR KZ LC LK LR LS LT LU LV LY MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2006546756 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 05814612 Country of ref document: EP Kind code of ref document: A1 |