WO2000068690A1 - Methode de detection de proteines en interaction mutuelle - Google Patents
Methode de detection de proteines en interaction mutuelle Download PDFInfo
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- WO2000068690A1 WO2000068690A1 PCT/JP2000/002802 JP0002802W WO0068690A1 WO 2000068690 A1 WO2000068690 A1 WO 2000068690A1 JP 0002802 W JP0002802 W JP 0002802W WO 0068690 A1 WO0068690 A1 WO 0068690A1
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- protein
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- separation
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- C—CHEMISTRY; METALLURGY
- C40—COMBINATORIAL TECHNOLOGY
- C40B—COMBINATORIAL CHEMISTRY; LIBRARIES, e.g. CHEMICAL LIBRARIES
- C40B30/00—Methods of screening libraries
- C40B30/04—Methods of screening libraries by measuring the ability to specifically bind a target molecule, e.g. antibody-antigen binding, receptor-ligand binding
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/13—Labelling of peptides
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- 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
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- 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
- G01N33/6842—Proteomic analysis of subsets of protein mixtures with reduced complexity, e.g. membrane proteins, phosphoproteins, organelle proteins
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S436/00—Chemistry: analytical and immunological testing
- Y10S436/824—Immunological separation techniques
Definitions
- the present invention relates to a method for detecting a protein that interacts with a certain protein, and a method for detecting a plurality of other proteins from proteins contained in a protein group consisting of various types of proteins by using this method.
- the present invention relates to a method for detecting a protein capable of interacting with any protein in a protein group consisting of:
- the present invention relates to a method of screening for a protein pair in which a substance, for example, a certain compound, affects an interaction between proteins.
- the present inventor believes that by examining whether or not a protein having an amino acid sequence encoded by each gene has an interaction with an existing or novel protein, it is possible to analyze the function of the gene to some extent.
- co-immunoprecipitation, phage display, yeast two-hybrid system, surface plasmon resonance, and the like are well known as methods for analyzing the interaction between proteins.
- co-immunoprecipitation requires antibodies against individual gene products (proteins), and preparing antibodies for all genes is not feasible, and the specificity of the antibodies also poses a problem.
- an object of the present invention is to provide a method capable of easily and rapidly detecting an interaction between a large number of proteins including a novel protein.
- An object of the present invention is to easily and efficiently systematically detect interacting gene products (proteins) even when all genes are isolated, which is useful for estimating the functions of proteins. Is to provide a way.
- the present invention provides a method for mixing a protein having a detection label synthesized by a cell-free protein synthesis method and a protein having a separation modification synthesized by a cell-free protein synthesis method, and forming a protein formed by an interaction between the proteins.
- the pair is separated
- a method for detecting an interacting protein comprising separating from a protein having a detection label that does not form a protein pair by using the modification for protein, and performing identification using the detection label.
- the first detection method referred to as the first detection method.
- the present invention provides a method for synthesizing a protein having a detection label and a protein having a modification for separation in the same system by a cell-free protein synthesis method, and forming a protein pair formed by the interaction between the proteins.
- An interacting protein wherein the protein is separated from a protein having a detection label that does not form a protein pair by using the separation modification, and is identified using the detection label. (Hereinafter, referred to as a second detection method).
- the present invention provides a substrate on which a protein synthesized by a cell-free protein synthesis method is prepared, and a protein having a detection label synthesized by a cell-free protein synthesis method is brought into contact with a substrate on which the protein is dot-coated. A protein pair formed between the protein and the protein that has been dropped by the interaction between the two proteins using the detection label. Detection method). Further, the present invention provides a method of mixing a protein having a detection label synthesized by a cell-free protein synthesis method and a protein having a separation modification synthesized by a cell-free protein synthesis method in the presence of at least one substance. Then, the protein pair formed by the interaction between the proteins is separated from the protein having a detection label that does not form a protein pair by using the separation modification, and the detection label is used. (1 1 1)
- a method of screening for a protein pair that affects the interaction between proteins hereinafter referred to as a first screening method.
- the present invention also provides a method for synthesizing a protein having a label for detection and a protein having a modification for separation in the same system by a cell-free protein synthesis method, and adding at least one substance to the synthesis system after the synthesis. Separating the protein pair formed by the interaction between the proteins in the presence of the substance from the protein having a detection label that does not form the protein pair by using the separation modification; and Identifying using the detection label (2 1),
- Steps (2-2) similar to step (21) except that the above substances are not added after protein synthesis, and
- a method for screening a protein pair that affects the interaction between proteins hereinafter referred to as a second screening method.
- the present invention provides a substrate on which a protein synthesized by a cell-free protein synthesis method is prepared, and at least one kind of a protein having a detection label synthesized by a cell-free protein synthesis method is used as a substrate with the protein.
- step (3-3) searching for a protein pair in which the substance influences the interaction between the proteins by comparing the protein pairs identified in the step (3-1) and the step (3-2);
- Figure 1 shows the electrophoresis pattern of 35S-labeled protein synthesized from each cDNA plasmid using a cell-free protein synthesis system (transcription / translation system).
- Figure 2 shows the electrophoresis pattern of biotinylated modified protein synthesized from each cDNA DNA using a cell-free protein synthesis system (transcription / translation system).
- the first is how many proteins can be prepared.
- the second is how to label a given protein for detection.
- Third how to modify a given protein for isolation.
- Fourth is it possible to create a system that can process multiple samples simultaneously?
- Fifth it is possible to screen for interactions between proteins affected by a specific compound or the like.
- a protein having a label for detection and a repair for separation are used.
- the decorated protein is synthesized by a cell-free protein synthesis method.
- the cell-free protein synthesis method is a well-known method, and kits for cell-free protein synthesis are also commercially available.
- kits for cell-free protein synthesis include the Promega In vitro translation system. In the present invention, such a kit can be used.
- the starting material for protein synthesis by the cell-free protein synthesis method may be either DNA or RNA.
- DNA is used as a starting material
- RNA which is a transcription product of DNA, is a type II protein.
- RNA polymerase phage RNA polymerase such as T7, T3, and SP6 is used simply and frequently. However, it is not limited to this.
- a cell-free protein synthesis system egret reticulocyte lysate and wheat germ lysate are often used, but are not limited thereto. It is convenient to perform transcription and translation at the same time, but they may be performed separately.
- kits that allows simultaneous transcription and translation are commercially available (a kit named "TNT Lysate Coupled Transcription / Translation" is available from Promega).
- TNT Lysate Coupled Transcription / Translation is available from Promega.
- biosynthesized proteins may undergo various modifications such as processing and addition of sugar chains. If higher-order structures such as these post-translational modifications and receptors are required, microsomal fractionation or membrane fractionation may be added.
- One or more kinds of proteins may be synthesized by the cell-free protein synthesis method. ⁇ By using one type of DNA or RNA as type, A variety of proteins can be synthesized, and by using two or more types of DNA or RNA as type II, two or more types of proteins can be synthesized.
- the detection label and the modification for separation are introduced specifically in the amino acid mixture during protein synthesis (however, when amino acids corresponding to the amino acids having the detection label and / or separation modification described below are excluded). ), A protein having a detection label and / or a modification for separation can be synthesized by using a product obtained by adding an amino acid having a detection label and / or a modification for separation. Alternatively, an aminoacyl-tRNA derivative having a detection label and / or a modification for separation may be used in place of an amino acid having a detection label and / or a modification for separation. Modifications can be made. Examples of the aminoacyl tRNA derivative include a lysyl tRNA derivative.
- the detection label and / or the separation modification of the protein can also be performed by using a pure mycin derivative having a detection label and / or a separation modification instead of the amino acid.
- the detection label to be introduced into the protein having the detection label may be, for example, any of a fluorescent substance, a chemiluminescent substance, a radioisotope and a stable isotope.
- a label for detecting a predetermined protein can be obtained by adding an amino acid for labeling to the cell-free transcription / translation system described above.
- radioactive labels such as [35S] methionine, [35S] cysteine, [3H] leucine and [14C] leucine, chemiluminescent labels and fluorescent labels, and stable isotopes were used. There is no problem in using any of the labels, provided that a measurement method suitable for each detection is used.
- Radiolabeled amino acids are commercially available, and commercially available products can be obtained.
- An amino acid derivative labeled as an amino acid of aminoacyl-tRNA can also be used.
- NBD-labeled lysyl tRNA is known as fluorescent lysyl tRNA (Crowley, KS et al. Cell 73 (1993) 110-115).
- a label to be a derivative of an amino acid chemiluminescence, stable isotope, or the like can be used in addition to fluorescence.
- puromycin derivative (Pur) is added to the C-terminus of the generated protein when puromycin derivative (Pur) is added under specific conditions in a cell-free protein synthesis system (Hiroshi Yanagawa et al. End fluorescent labeling ”20th (1997) Abstracts of the Annual Meeting of the Molecular Biology Society of Japan 3. 501.
- Modification for separation of a given protein can be performed using the cell-free transcription / translation system described above, and using immobilized avidin or streptavidin if the protein is labeled with a substance such as biotin.
- the protein can be easily recovered.
- a protein biotinylation reagent tRNA linked to a biotinylated amino acid may be prepared.
- biotinylated lysine-tRNA is already commercially available and can be used.
- puromycin which has been biotinylated can be synthesized and used as the aforementioned puromycin derivative.
- a protein having a label for detection and a protein having a modification for separation are synthesized in different systems and mixed.
- a protein having a label for detection and a protein having a modification for separation are synthesized in the same reaction system.
- the synthesis of a protein having a detection label and a protein having a modification for separation in the same reaction system is performed, for example, by mixing an amino acid having a detection label and an amino acid having a separation modification in the reaction system. It can be carried out.
- the first detection method after mixing, protein interactions occur.
- protein synthesis and protein interaction are performed in parallel. However, in this case, for example, using a puromycin derivative or the like, separating from the detection label And that no modifications are introduced into the same protein.
- the conditions for forming a protein pair by protein interaction are, for example, as follows. First, a modified protein for separation (eg, a biotinylated protein) and a labeled protein for detection (eg, a protein labeled with 35 Met) are mixed and allowed to interact.
- the mixing ratio of both proteins is basically 1: 1. If the kit is used for protein synthesis, for example, mix 2. (equivalent to 7.5 to 15 ng as protein amount).
- the amount of liquid or protein to be added there is no particular limitation on the amount of liquid or protein to be added, but when mixing various proteins at once, the amount of protein per type is minimal, for example, 0.75 to 1 5 ng, and there is no particular upper limit.
- the amount of protein required for detection can be appropriately selected according to the type of detection label and the detection method.
- the temperature and time for protein mixing and subsequent interaction There is no particular limitation on the temperature and time for protein mixing and subsequent interaction.
- the mixing can be performed at 0 to 42 ° C for 30 minutes to 24 hours, and preferably at about 4 ° C for about 1 hour.
- the protein synthesis reaction solution obtained using the kit as it is keep the mixture at a low temperature (for example, 4 ° C) so that new protein synthesis does not occur after mixing, and maintain the interaction.
- the modified protein for separation is separated and recovered from a protein having a detection label that is not forming a protein pair.
- a protein having a detection label for example, in the case of a biotinylated protein, streptavidin magnet beads can be used.
- the addition of the beads and the reaction between the beads and the protein having the modification for separation are preferably carried out while stirring the reaction solution.
- There is no particular limitation on the temperature or time for separation For example, 0 ⁇ ! The time can be 15 minutes to 4 hours at 2 ° C, preferably about 30 minutes at a temperature around 4 ° C.
- undesirable new protein synthesis does not occur.
- skim milk a nonspecific adsorption inhibitor such as skim milk. Under the above conditions, it is sufficient to add about 2 mg of skim milk, for example. However, this amount can be appropriately changed depending on the conditions.
- the beads are collected with a magnet, and after washing well, the signal is detected.
- the reaction conditions, recovery method, and detection method described here can be appropriately changed depending on the type of the modification for separation and the type of the label for detection. Further, the interaction and separation conditions in the third detection method can be the same as described above.
- the protein pair formed by the interaction has a label for detection and a modification for separation.
- a system for detection a non-protein pair is detected (From the protein with the label).
- the modification for separation is biotin, avidin, or streptavidin
- separation can be achieved by immobilizing a protein pair on a solid phase using a solid phase on which a substance having an affinity for these substances is immobilized.
- the presence of a protein that has formed a protein pair can be detected from a protein that has not formed a protein pair by using the function of a detection label. That is, a protein that does not form a protein pair does not have a detection label and thus is not detected, and only a protein pair having a detection label and a modification for separation is detected.
- a substrate on which a protein synthesized by the cell-free protein synthesis method is prepared is prepared. Specifically, a protein having a modification for immobilization, for example, a separation modification such as biotinylation, avidinization, or streptavidinization, is synthesized, and this is dot-formed on a substrate.
- biotinylated, avidinated or streptavidinated protein By bringing a biotinylated, avidinated or streptavidinated protein into contact with a substrate on which a substance having affinity for biotin, avidin or streptavidin is immobilized, protein dots can be formed on the substrate. . More specifically, a biotin-labeled protein can be dot-dotted on a streptavidin-coated substrate. Commercially available products are available for streptavidin-coated substrates. Alternatively, a streptavidin-coated substrate can be prepared using magnetic streptavidin (BioMag streptavidin, PerSeptive Biosystems) and a magnetic substrate. A protein having a detection label is brought into contact with the substrate on which the protein has been dropped, and the interaction forms a protein pair with the protein on the substrate.
- magnetic streptavidin BioMag streptavidin, PerSeptive Biosystems
- the function of the detection label possessed by the protein pair is used to convert the protein into a protein. Can be detected. That is, on the substrate, the doted protein forms an existing force protein pair, and only the protein having the detection label is detected. More specifically, the first and second detection methods of the present invention are characterized in that the protein having a detection label is a protein group A containing one or more proteins, and the protein having a separation modification is A protein group B containing one or more proteins, and a protein a belonging to the protein group A and a protein B belonging to the protein group B.
- a protein pair (protein a — protein b) formed by an interaction between the protein b and the target protein b, using the separation modification of the protein b to separate it from the protein that has no protein pair and has a detection label Then, the detection can be performed by detecting the label of the protein a in the separated protein pair (protein a—protein b).
- the type of protein may be one or two or more.
- the protein group B containing the protein having the modification for separation may be of one kind or two or more kinds. For example, when detecting whether there is a protein that interacts with a specific protein in a group of unknown proteins, for example, as a protein group A, a plurality of proteins a1, a2 Using a group of proteins including a3, a4, and a5, and using only one specific protein bl as the protein group B, interacts with protein b1 to form a protein pair, For example, protein a3 which forms (protein a3-protein b1) can be detected.
- protein group A only one specific protein a1 is used as the protein group A, and a protein group containing a plurality of proteins bl, b2, b3, b4, and b5 is used as the protein group B.
- protein b4 that interacts with protein a1 to form a protein pair for example, (protein a1-protein b4), can be detected.
- the protein having a detection label is a protein group A containing one or more proteins, and one or two proteins dotted on the substrate are used.
- a protein group B containing the above proteins, wherein the protein b belonging to the protein group B and the protein b A protein pair (protein a-protein b) is formed by interaction with protein a belonging to protein group A, and the label of protein a in the protein pair (protein a-protein b) on the substrate is This is a method of selecting a protein that interacts with a protein contained in the protein group B by detection.
- the protein group A containing a protein having a detection label may be of one kind or of two or more kinds.
- the protein group B containing the protein that is deposited on the substrate may be of one type or of two or more types.
- a plurality of proteins and a protein having a detection label and a protein having a modification for separation can be synthesized in parallel by a cell-free protein synthesis method.
- Such a system that can process a plurality of samples at the same time uses a multiwell plate such as a 96-well or 384-well plate to perform protein synthesis reaction, protein interaction, and protein pairing formed by the interaction.
- a system for performing separation can be given.
- a protein having a detection label and a protein having a modification for separation are synthesized in each of two multiwell plates, and the resulting sample in each well is mixed. Then, the interacting proteins are separated and detected using the separation modification of the protein.
- biotinylated protein is immobilized on a plate as in the case of DNA chip formation, and a microtip chip of a biotinylated protein can be prepared and used. These are all suitable for robotization and automation, and can process multiple samples quickly. O 00 /
- the method of the present invention is aimed at synthesizing proteins corresponding to all genes, which are said to be about 100,000, in a cell-free system, and detecting protein interactions. Therefore, in such a case, it is preferable to carry out a plurality of syntheses and interactions of a protein having a detection label and a protein having a Z or separation modification by a cell-free protein synthesis method in parallel. Protein synthesis may be performed for each gene or may be performed for two or more genes collectively. However, the synthesized proteins must be modified for separation and labeled for detection.
- Simultaneously performing a plurality of cells means that a well such as a micro multi-well plate is finally prepared, for example, by preparing 100,000 horizontal units and 100,000 vertical units for a total of 100,000 XI 100,000. 100,000 proteins modified for separation and 100,000 proteins labeled for detection were added to the wells in the row and 100,000 proteins labeled for detection, and the labeling signal was added to the recovered proteins for separation. It means finding out what is acceptable. With such a system, interaction can be detected quickly and easily even for a large number of samples.
- a microprotein chip in which 100,000 kinds of separation proteins are fixed on a substrate in advance may be used.
- “100,000 types” is an example, and there is no intention to limit a plurality to “100,000 types”.
- 96 Tests of 20,000 combinations using a 6-well microwell plate can be performed as follows. 9 Use 6-well microwell plates one by one. Thus, a protein having 96 kinds of separation modifications and a protein having a detection label are prepared. The proteins for 32 ⁇ -ells on each plate are grouped into one group (divided into three groups of X, Y, and ⁇ for separation and three groups of X, y, and z for detection) Interact with 9 groups of Yx, Yy, Yz, Zx, Zy, Zz.
- the modification for separation and the labeling for detection are performed with the puromycin derivative
- the modification for separation and the labeling for detection can be performed simultaneously in one tube (synthetic system).
- the following method can be mentioned as a method for searching for a protein that forms a protein pair by interaction.
- a protein group including a plurality of proteins is used as at least one of a protein having a detection label and a protein having a separation modification.
- a protein pair formed by interaction between proteins is detected, at least a protein group consisting of the plurality of proteins is detected. Subdivide into two subgroups.
- both the protein having the detection label and the protein having the modification for separation consist of a plurality of proteins, it is necessary to subdivide the protein into at least two subgroups. Group.
- the protein pairs formed by the interaction of proteins are separated and detected again to narrow down the types of proteins that form the protein pairs.
- a protein group consisting of proteins having a label for detection ten kinds of protein groups consisting of ten kinds of proteins are prepared, and a protein group consisting of proteins having a modification for separation also consists of ten kinds of proteins.
- the detection method of the present invention is applied to this 10 ⁇ 10 protein group.
- a protein formed by an interaction between proteins in a combination of a protein having one detection label and a protein having separation modification When a pair is detected, for example, the two protein groups are each subdivided into five subgroups.
- the detection method of the present invention is applied again, and the protein pair formed by the interaction between the proteins Refine. Then, by subdividing the narrowed subgroup again (this time, it becomes 2 ⁇ 2 so as to include only one type of protein) and applying the detection method of the present invention, finally, the protein Can reach protein pairs formed by the interaction of That is, by repeatedly subdividing into subgroups and separating and detecting protein pairs until the subgroup contains a single protein, the protein pairs formed by the interaction between the proteins of interest are Can be reached.
- a protein having a label for detection and a protein for separation When at least one of the proteins having the W modification is composed of a plurality of proteins and a protein pair formed by the interaction between the proteins is detected, the protein group consisting of the plurality of proteins is converted into at least two proteins. Subdivide into subgroups. However, when both the protein having the detection label and the protein having the modification for separation consist of a plurality of proteins, the fragmentation is performed on one or both of the protein groups. For the subdivided subgroups, the protein pairs formed by the interaction of the proteins are separated and detected again, and the types of proteins forming the protein pairs are narrowed down.
- Subdivision into subgroups and separation and detection of protein pairs can be repeated until the subgroup contains a single protein.
- the third detection method of the present invention when at least one of a protein having a detection label and a dot protein is composed of a plurality of proteins, and a protein pair formed by interaction between the proteins is detected,
- the group of proteins comprising the plurality of proteins is subdivided into at least two subgroups.
- both the protein having the detection label and the dot protein are composed of a plurality of proteins, the fragmentation is performed on either one or both protein groups.
- the protein pairs formed by the protein interaction are separated and detected again to narrow down the types of proteins forming the protein pairs.
- the combination of the protein having the separation modification and the protein having the modification for detection includes: i) a combination in which both the protein having the detection label and the protein having the modification for separation are novel proteins; (3) Protein with detection label is a known protein, and protein with separation modification is a novel protein
- the combination may be (4) a combination in which both the protein having the label for detection and the protein having the modification for separation are known proteins.
- protein pairs that interact with each other can be found among unknown proteins.
- combinations (2) and (3) unknown protein pairs that interact with a known protein can be found. Protein can be found.
- the combination (4) for example, it is possible to know whether or not a protein known to cause an interaction with a protein having a modification for separation is included in a protein having a detection label. .
- the detection method of the present invention when all genes are isolated, can easily and efficiently systematically detect interacting products between their gene products (proteins), and improve the function of the proteins. It is useful for analogy, and can also be applied to diagnostic systems.
- the first screening method of the present invention has the following steps (1-1) to (113).
- Step (11) A protein having a detection label synthesized by a cell-free protein synthesis method and a protein having a separation modification synthesized by a cell-free protein synthesis method are present in the presence of at least one substance. Mixing, separating the protein pair formed by the interaction between the proteins using the separation modification, and Identify using signs. Synthesis of proteins with detection labels and proteins with separation modification by cell-free protein synthesis, separation using separation modification of protein pairs formed by interaction between proteins, and detection labels All of the utilized protein pairs can be identified in the same manner as in the detection method.
- the substance to be present when mixing the proteins is not particularly limited, and may be, for example, amino acids, peptides, proteins, lipids, carbohydrates and derivatives thereof, and further, amino acids, peptides, proteins, and the like. Complexes of lipids, carbohydrates and their derivatives can be mentioned.
- the substances to be present when mixing the proteins include, for example, alkaloids, terpenes, coenzymes, antibiotics, eporacene and its derivatives, benzophenone derivatives, tetraazaeicosane, Natural organic compounds such as kibocins, coumarin derivatives, dipyridinium derivatives, hirsten derivatives, cyclopropane derivatives, arosamidine derivatives, quinoline derivatives, quinocalcins and their derivatives, and derivatives thereof can also be used.
- the substance to be present when mixing the proteins may be a herbal medicine or a folk medicine. The effects of Kampo herbal medicines and folk medicines are known empirically, but their effects are not well known.
- licorice is said to be effective for swelling, rhubarb for excessive diarrhea, and mahuang for insomnia. Therefore, it is expected that such a substance can be screened for what kind of protein-protein interaction using the method of the present invention.
- Step (113) By comparing the protein pairs identified in step (111) and step (1-2), the protein affects the interaction between the protein and the protein. Search for pairs. For example, if the protein pair detected in the step (111) performed in the presence of the test substance is not detected in the step (112) performed in the absence of the test substance, It can be seen that this protein pair promoted the interaction between proteins by the above substances. When a protein pair not detected in the step (111) performed in the presence of the test substance is detected in the step (112) performed in the absence of the test substance, This protein pair shows that the interaction between proteins was inhibited by the above substance. In addition, varying the abundance of test substances used when mixing proteins can also measure how much the interaction between proteins is promoted or inhibited.
- the second screening method of the present invention has the following steps (2-1) to (2-3).
- Protein with detection label and modification for separation The synthesis of a protein having the same by a cell-free protein synthesis method, the separation using a separation modification of a protein pair formed by the interaction between proteins, and the identification of a protein pair using a detection label are all described above. The detection can be performed in the same manner as in the detection method.
- the same substances as those in the first screening method can be used.
- a synergistic effect of a plurality of substances on the interaction between proteins can be detected.
- This step is the same as the step (2-1) except that the step is performed without adding the substance after the synthesis of the protein.
- Step (2-3) Searching for protein pairs that affect the interaction between the proteins by comparing the protein pairs identified in step (2-1) and step (2-2). I do.
- the third screening method of the present invention includes the following steps (3-1) to (3-3).
- Step (3-1) Prepare a substrate on which a protein synthesized by the cell-free protein synthesis method is dot-prepared, and set a detection label synthesized by the cell-free protein synthesis method.
- the protein is brought into contact with the substrate on which the protein has been doted in the presence of at least one substance, and the protein pair formed between the protein and the protein that has been doted by the interaction between the proteins is utilized using the detection label. And identify.
- the substance to be present at the time of mixing the proteins the same substances as those in the first screening method can be used. By using a mixture of two or more of these substances, it is possible to detect a synergistic effect of a plurality of substances on the interaction between proteins.
- the protein pair formed between the substrate and the protein which is brought into contact by the interaction between the proteins is identified by utilizing the detection label.
- This step is the same as step (3-1) except that the contact between the protein having the detection label and the substrate is performed in the absence of the substance.
- Step (3) By comparing the protein pairs identified in Step (1) and Step (2), a protein pair in which the substance affects the interaction between the proteins is searched.
- a compound corresponding to cyclosporin A or FK506 is prepared in advance, protein-protein interaction is performed in the presence or absence of these compounds, and the effect of cyclosporin A or the like is measured, it becomes One can screen for interactions between proteins such as filin and calcineurin, or FKBP and calcineurin.
- a protein pair in which a certain compound affects the protein-protein interaction can be screened from unspecified proteins-proteins. For example, by using cyclosporin A or FK506, a protein pair having the same interaction as a protein pair such as cyclophilin and calcineorin or FKBP and calcinoiline can be screened.
- Reference Examples 1 and 2 show that protein can be recovered and detected from a specific gene by using the cell-free protein synthesis method.
- Example 1 further shows that proteins that are well known to interact (eg, SV40 largeT and p53, or fos and jun) are actually detectable by this method.
- the following plasmid DNA was prepared for evening protein preparation.
- SV40 DNA was purchased from BRLZ Lifetech. 1
- the argeT gene consists of two exons. Exon 1 was amplified by the PCR method. The primers used are as follows. SV40F: o'-CCGGAATTCATGGATAAA GTTTTAAACAGAGAG, SV40R: AGTTCCATAGGTTGGAATCTCAGTTGCATCCCAGAAGo Next, cut out the fragment between the EcoRI site (5 'side of the start code ATG) and the Van91I site.
- Exon 2 excises a fragment between the Van91I site and the BamHI site (3 'of the stop codon TGA). Since the 3 'end and 5' end of exons 1 and 2 are Yan91I sites, the two fragments were directly inserted into pBluescript and cloned to obtain a plasmid for expressing SV40 largeT.
- RIKEN clone 16B0O0OMllBa was amplified by PCR and used.
- the sequence of FJun is as follows: 5'-GCCAATTGCCGCCACCATGATGTTCTCGGGTTTCAACG.
- TE4U and 2X sample buffer (total 10 1) were added to the reaction mixture 11, and the mixture was heat-treated at 100 ° C for 3 minutes and subjected to SDS polyacrylamide electrophoresis (30 mA, about 1.5 hours migration). After fixation and coomassie dyeing and drying, the RI band was detected with BAS2000.
- FIG. 1 shows the results.
- the DNA template used in the figure is as follows. Lanes 1 and 2:
- Lanes 2, 4, 6, and 8 show the results of supernatants collected after the addition of streptavidin beads after the reaction. These results indicate that proteins specific to each DNA template were synthesized, and that these labeled proteins could not directly interact with streptavidin beads.
- Reference example 2 Protein synthesis from gene (Piotin labeling and recovery of biotinylated protein) Force similar to 35S-Met labeling Amino acid mixture (minus Met) Amino acid mixture ImM ⁇ instead of 1 mM and biotin instead of 35S-Met Biotinylated lysine tRNA (TranscendTM tRNA) 11 was added.
- SDS polyacrylamide electrophoresis was performed, the protein was blotted on a PVD F membrane and the biotinylated protein was detected using a biotin detection kit (Beilinger).
- FIG. 2 shows the results.
- the plasmid used in the figure is as follows. Lanes 1, 2: SV 40 large T, lanes 3, 4: p53, lanes 5, 6: luciferase. Lanes 2, 4, and 6 show the results of supernatants obtained by adding streptavidin beads after the reaction. These results indicate that proteins specific to each DNA template have been synthesized, and that these biotinylated proteins interact with streptavidin beads and are recovered. Although not described here, a biotinylated protein was similarly prepared using DNA templates for fos and jun.
- Example 1 Example 1
- each of the 8 genes A to H is labeled protein according to Reference Example 1 (however, in this experiment, ultrafiltration membrane was used to remove free 35 S-Met after the reaction) (Amicon)) and a biotinylated protein was prepared according to Reference Example 2.
- 16 types of each protein were mixed together as a set (1 i 1 for each labeled protein and 2 x 1 for each 2 ⁇ 1 of biotinylated protein), and 20 sets of labeled protein and 20 sets of biotinylated protein were used.
- Table 2 shows the detected RI (cpm) values
- Table 3 shows the statistical values (number (n), mean value (m) and standard deviation ( ⁇ )) calculated for each data.
- Table 2 shows that a set of 20 sets of labeled proteins (vertical axis) and a set of 20 sets of biotinylated proteins (horizontal axis) interacted in the same manner as in Example 2 and detected signals ( c pm).
- the values for the positive control (P) are the same combinations (corresponding to the diagonal in the table) with the addition of biotinylated jun 21 and 35S-Met-labeled fos 1/1, which are known to act beforehand. Yes (see Example 1).
- the number of individuals n was as small as 4, Since it was not suitable for quantitative treatment, the one with a high signal value was selected as the next detection candidate. Generally, the population n must be at least 5 or 6 for the confidence level to exceed 95%. Therefore, when the number of individuals n is 5 or 6 or more, a combination having a significant difference can be evaluated by performing statistical processing.
- Bpx protein secret leosome assembly protein homologue
- the present invention it is possible to provide a method capable of easily and quickly detecting an interaction between a large amount of proteins including a novel protein.
- This method is an easy and efficient method to systematically detect interacting gene products (proteins) even when all genes are isolated, and is useful for estimating protein functions. It is. That is, protein-protein interaction can be systematically detected by labeling proteins obtained from each clone of the cataloged full-length cDNA large-scale library and modifying them for isolation.
- a protein pair affected by a certain kind of compound for example, an organism-related substance or a natural organic compound
- a certain kind of compound for example, an organism-related substance or a natural organic compound
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US09/959,768 US7122382B1 (en) | 1999-05-07 | 2000-04-28 | Method for detecting proteins under mutual interaction |
CA2373491A CA2373491C (en) | 1999-05-07 | 2000-04-28 | Method of detecting interacting proteins |
EP00921081A EP1182458B1 (en) | 1999-05-07 | 2000-04-28 | Method for detecting proteins under mutual interaction |
DE60038677T DE60038677D1 (de) | 1999-05-07 | 2000-04-28 | Verfahren zum nachweis von proteinen, die miteinander interagieren |
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JP11/127586 | 1999-05-07 | ||
JP22426999A JP4493125B2 (ja) | 1999-05-07 | 1999-08-06 | 相互作用するタンパク質の検出方法 |
JP11/224269 | 1999-08-06 |
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WO2002074950A1 (fr) * | 2001-02-27 | 2002-09-26 | Mitsubishi Chemical Corporation | Procede d'analyse d'interaction intermoleculaire |
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EP1350846A4 (en) | 2000-12-07 | 2005-01-26 | Univ Keio | C-TERMINAL MODIFIED PROTEIN AND METHOD FOR THE PRODUCTION THEREOF, IN THE PREPARATION OF C-TERMINAL MODIFIED PROTEIN TO BE USED, AND TRANSLATION TEMPLATE AND METHOD FOR DETECTING PROTEIN CHANGING EFFECT USING THE C-TERMINAL MODIFIED PROTEIN |
JP2002372517A (ja) * | 2001-05-31 | 2002-12-26 | Inst Of Physical & Chemical Res | 質量分析法によるタンパク質の構造解析方法 |
WO2003014734A1 (fr) * | 2001-08-07 | 2003-02-20 | Keio University | Procede de detection d'une interaction entre une substance et une proteine, procede d'analyse de la proteine interagissant avec la substance et procede de formation d'un complexe contenant la substance et la proteine interagissant avec cette substance |
CA2459893C (en) | 2001-09-10 | 2014-01-21 | Meso Scale Technologies, Llc | Methods and apparatus for conducting multiple measurements on a sample |
US7582260B2 (en) * | 2002-07-18 | 2009-09-01 | Montana State University | Zwitterionic dyes for labeling in proteomic and other biological analyses |
WO2004042352A2 (en) | 2002-10-30 | 2004-05-21 | Meso Scale Technologies, Llc | Substrates of n-end rule ubiquitylation and methods for measuring the ubiquitylation of these substrates |
GB0228429D0 (en) * | 2002-12-05 | 2003-01-08 | Novartis Ag | Organic compounds |
US7435538B2 (en) * | 2003-09-08 | 2008-10-14 | Cellfree Sciences Co., Ltd. | High throughput screening method of drug for physiologically active protein |
JP2005308412A (ja) * | 2004-04-16 | 2005-11-04 | Olympus Corp | 無細胞タンパク質合成系で作られた蛍光を利用した効率的なタンパク質の機能解析スクリーニングの方法 |
KR100845139B1 (ko) | 2006-12-13 | 2008-07-09 | 전북대학교산학협력단 | 단백질-단백질 상호작용 측정을 위한 실시간 이중 색상분석방법 및 그 장치 |
KR101136285B1 (ko) * | 2010-12-29 | 2012-04-19 | 동아제약주식회사 | 생약 추출물, 이를 포함하는 약학 조성물 및 이를 포함하는 건강기능 식품 |
US8586106B2 (en) | 2011-12-06 | 2013-11-19 | The Concentrate Manufacturing Company Of Ireland | Fatigue-relieving herbal extracts and beverages comprising the same |
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- 2000-04-28 US US09/959,768 patent/US7122382B1/en not_active Expired - Fee Related
- 2000-04-28 CA CA2373491A patent/CA2373491C/en not_active Expired - Fee Related
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JPH09507760A (ja) * | 1994-11-03 | 1997-08-12 | リサーチ ディベロップメント ファンデーション | 蛍光物質でラベルした蛋白質の合成方法 |
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EP1182458A4 (en) | 2005-02-16 |
CA2373491A1 (en) | 2000-11-16 |
JP2001027633A (ja) | 2001-01-30 |
JP4493125B2 (ja) | 2010-06-30 |
CA2373491C (en) | 2010-07-06 |
ATE393394T1 (de) | 2008-05-15 |
US7122382B1 (en) | 2006-10-17 |
EP1182458A1 (en) | 2002-02-27 |
EP1182458B1 (en) | 2008-04-23 |
DE60038677D1 (de) | 2008-06-05 |
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