WO2013165065A1 - Device for analyzing protein-protein interactions at single molecular level in cell environment - Google Patents

Device for analyzing protein-protein interactions at single molecular level in cell environment Download PDF

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Publication number
WO2013165065A1
WO2013165065A1 PCT/KR2012/010510 KR2012010510W WO2013165065A1 WO 2013165065 A1 WO2013165065 A1 WO 2013165065A1 KR 2012010510 W KR2012010510 W KR 2012010510W WO 2013165065 A1 WO2013165065 A1 WO 2013165065A1
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protein
substrate
wavelength
interaction
cell
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PCT/KR2012/010510
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French (fr)
Korean (ko)
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윤태영
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한국과학기술원
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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/6408—Fluorescence; Phosphorescence with measurement of decay time, time resolved fluorescence
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
    • 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
    • G01N33/52—Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper and including single- and multilayer analytical elements
    • 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
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/531—Production of immunochemical test materials
    • G01N33/532—Production of labelled immunochemicals
    • G01N33/533—Production of labelled immunochemicals with fluorescent label
    • 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
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/536—Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase
    • G01N33/542—Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase with steric inhibition or signal modification, e.g. fluorescent quenching
    • 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
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
    • G01N33/54366—Apparatus specially adapted for solid-phase testing
    • G01N33/54373—Apparatus specially adapted for solid-phase testing involving physiochemical end-point determination, e.g. wave-guides, FETS, gratings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/645—Specially adapted constructive features of fluorimeters
    • G01N21/648—Specially adapted constructive features of fluorimeters using evanescent coupling or surface plasmon coupling for the excitation of fluorescence

Definitions

  • the present invention relates to an apparatus for analyzing protein-protein interactions, and more particularly, to analyze protein-protein interactions in a real cell environment down to a single molecule level, and to involve other proteins in a real cell environment.
  • the present invention relates to a protein-protein interaction analysis device capable of analyzing the influence on a specific protein-protein interaction.
  • Cells maintain life by performing various biological functions such as gene expression, cell growth, cell cycle, metabolism, and signaling through diverse and complex protein-protein interactions.
  • understanding protein-protein interactions and their functions within cells is the cornerstone of understanding life phenomena and an important foundation for drug development and disease treatment.
  • a typical method for investigating protein-protein interactions in vitro is affinity chromoatography.
  • the method for investigating protein-protein interaction according to the prior art for quantitative measurement is to purify each protein present in the cell and to separate them from other substances in the cell in order to analyze the protein-protein interaction. Because of their interaction analysis, the protein-protein interaction in the real cellular environment in which other proteins and the like are mixed cannot be analyzed at the single molecule level.
  • the method for investigating protein-protein interactions according to the prior art has a limitation in that it is not possible to analyze the influence on specific protein-protein interactions when other proteins are involved in the actual cellular environment. .
  • the object of the present invention is not only to analyze protein-protein interactions in the real cellular environment down to the single molecule level, but also to specific protein-protein interactions when other proteins are involved in the real cellular environment. It is to provide a protein-protein interaction analysis device that can analyze the impact on.
  • Protein-protein interaction analysis device for achieving the above object, in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, the first protein provided in the first protein Sample loading unit is loaded with a substrate attached to the biomolecule sieve is bonded to the marker-by supplying the first protein to the substrate is coupled to the first marker and the biomolecule sieve, the first marker and the living body When molecular sieves are bound, a cell solution of cells containing a second protein with a second marker is supplied to the substrate; An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion; And an optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate. do.
  • the optical measuring unit characterized in that for measuring the integral of the fluorescent signal of the second wavelength for a predetermined time.
  • the optical measuring unit may measure the fluorescent signal of the second wavelength in real time in the presence of the supplied cell solution on the substrate.
  • the first marker and the second marker is characterized in that the fluorescent protein having a different wavelength.
  • the apparatus may further include a signal analyzer configured to analyze the fluorescent signal of the second wavelength measured by the optical measurer through image processing.
  • the protein-protein interaction analysis device in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, is coupled to the first marker provided in the first protein
  • Sample loading unit is loaded with a substrate on which the biomolecule sieve is attached-supplying the first protein to the substrate to induce binding of the first marker and the biomolecule sieve, the first marker and the biomolecule sieve is coupled
  • a cell solution of cells containing a second protein with a second marker is supplied to the substrate;
  • An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion;
  • An optical measuring unit configured to sense a change of the first wavelength to a second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate;
  • a signal analyzer configured to analyze the fluorescence signal of the second wavelength measured by the optical measuring unit through image processing to obtain a first analysis value, wherein the sample loading unit includes a first marker provided in
  • the optical measuring unit detects the change of the first wavelength to the second wavelength on the surface of the substrate according to the interaction of the first protein and the second protein, and the signal analyzing unit measures the first measured by the optical measuring unit
  • the fluorescence signal of two wavelengths may be analyzed through image processing to obtain a second analysis value.
  • the protein-protein interaction analysis device in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, the first protein which is a biomolecular sieve to which the first protein is bound
  • a sample loading unit in which a substrate having a binding molecular sieve attached is loaded.
  • the sample loading unit is supplied to the substrate to induce binding of the first protein and the first protein binding molecular sieve.
  • a cellular solution of cells containing a second protein with a marker is supplied to the substrate;
  • An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion;
  • An optical measuring unit configured to sense a change of the first wavelength to a second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate;
  • a signal analyzer configured to analyze the fluorescence signal of the second wavelength measured by the optical measuring unit through image processing to obtain a first analysis value
  • the sample loading unit is a biomolecular sieve to which the first protein is bound.
  • a mixed cell solution obtained by mixing the cell solution and the analyte cell solution is supplied to the new substrate, and the mixed cell solution is supplied to the new substrate.
  • the optical measuring unit detects the change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein, and the signal analyzing unit measures the second measured by the optical measuring unit
  • the fluorescent signal having the wavelength may be analyzed through image processing to obtain a second analysis value.
  • the apparatus further includes a signal diagnosis unit for comparing and analyzing the first analysis value and the second analysis value.
  • the optical measuring unit may integrally measure the fluorescent signal having the second wavelength for a predetermined time.
  • the optical measuring unit may measure the fluorescent signal of the second wavelength in real time in the presence of the supplied cell solution on the substrate.
  • the first marker and the second marker is characterized in that the fluorescent protein having a different wavelength.
  • the protein-protein interaction analysis device in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, the first protein which is a biomolecular sieve to which the first protein is bound
  • a sample loading unit in which a substrate having a binding molecular sieve attached is loaded The first protein is supplied to the substrate to induce binding of the first protein and the first protein binding molecular sieve, and the first protein and the first protein are loaded.
  • a cellular solution of cells containing a second protein with a marker is supplied to the substrate;
  • An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion;
  • an optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate.
  • the optical measuring unit may integrally measure the fluorescent signal of the second wavelength for a predetermined time.
  • the protein-protein interaction analysis device in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, the first protein which is a biomolecular sieve to which the first protein is bound
  • a sample loading unit in which a substrate having a binding molecular sieve attached is loaded The first protein is supplied to the substrate to induce binding of the first protein and the first protein binding molecular sieve, and the first protein and the first protein are loaded.
  • a cellular solution of cells containing a second protein with a marker is supplied to the substrate;
  • An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion;
  • an optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate.
  • the optical measuring unit may measure the fluorescence signal of the second wavelength in real time in the presence of the supplied cell solution on the substrate.
  • the protein-protein interaction analysis device in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, the first protein which is a biomolecular sieve to which the first protein is bound
  • a sample loading unit in which a substrate having a binding molecular sieve attached is loaded The first protein is supplied to the substrate to induce binding of the first protein and the first protein binding molecular sieve, and the first protein and the first protein are loaded.
  • a cellular solution of cells containing a second protein with a marker is supplied to the substrate;
  • An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion;
  • an optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate.
  • the apparatus may further include a signal analyzer configured to analyze the fluorescent signal of the second wavelength measured by the optical measuring unit through image processing.
  • protein-protein interactions in the actual cellular environment can be analyzed up to the single molecule level.
  • FIG. 1 is a flowchart illustrating a method of analysis in a protein-protein interaction analysis device according to an embodiment of the present invention
  • FIGS. 2 to 4 are diagrams illustrating each step of the protein-protein interaction analysis method according to an embodiment of the present invention
  • FIG. 5 is a flowchart illustrating a method for analyzing protein-protein interactions according to another embodiment of the present invention.
  • FIG. 6 is a functional block diagram showing the structure of an assay apparatus in which the protein-protein interaction analysis method in FIGS. 1 to 5 is executed.
  • FIG. 7 is a view showing a signal measured by the optical measuring unit of the protein-protein interaction analysis device according to the present invention.
  • FIG. 1 is a flowchart illustrating an analysis method in a protein-protein interaction analysis device according to an embodiment of the present invention.
  • the analyst when explaining the analysis method in the protein-protein interaction analysis device according to an embodiment of the present invention, first, the analyst has a single interaction between the two specific proteins, the first protein and the second protein
  • the first fluorescent protein as a marker is expressed on the first protein existing in the cell through genetic engineering in the cellular state (S110).
  • the first fluorescent protein may be attached or linked to the first protein by a physicochemical method.
  • the first protein was h-Ras protein
  • the second protein was Ras-binding domain (RBD) protein of C-Raf
  • the first fluorescent protein was m-Cherry protein.
  • the analyst then analyzed the first fluorescent protein, which is an antibody that binds to the first fluorescent protein expressed as a marker on the first protein in step S110, on a substrate that is a polyethyleneglycol (PEG) coated Quartz slide.
  • the binding antibody is attached as in FIG. 2 (S120).
  • the antibody which binds to the first fluorescent protein includes, in addition to the antibody, a biomolecular sieve that binds to a first fluorescent protein such as a liposome having a specific component that binds to DNA, RNA, and protein.
  • a biomolecular sieve that binds to a first fluorescent protein such as a liposome having a specific component that binds to DNA, RNA, and protein.
  • the analyst supplies the cytoplasmic stock solution of cells in which the first fluorescent protein is expressed in the internal first protein prepared in step S110 to the substrate (S130), thereby expressing the first fluorescent protein expressed in the first protein. Induces the binding of the first fluorescent protein binding antibody (S140).
  • step S130 not only the cellular stock solution, but also a cell solution such as a cell stock solution, diluted cytoplasm stock solution, or diluted cell stock solution may be used.
  • the analyzer determines the wavelength of the first fluorescent protein. From the change (ie, by measuring the individual monomolecular signals generated from the first fluorescent protein), it is possible to determine whether the first fluorescent protein is bound to the plurality of first fluorescent protein binding antibodies attached to the substrate.
  • the predetermined protein expressed in the first protein for binding with the antibody attached to the substrate does not necessarily need to be a fluorescent protein. Since it is not possible to grasp through the total reflection microscope, the protein expressed in the first protein may be a fluorescent protein.
  • the predetermined protein expressed in the first protein in the present invention performs the function of an antigen that binds to the antibody attached to the substrate.
  • the predetermined antigen attached to the first protein must be a protein. It may be a compound capable of binding to the antibody.
  • the protein expressed in the first protein is a fluorescent protein
  • the analyst supplies a buffer solution to the substrate, thereby preparing the cytoplasmic stock except for the first protein expressing the first fluorescent protein.
  • the remaining substances contained in the are removed on the substrate (S150).
  • the analyst causes the second fluorescent protein to be expressed as a marker through genetic engineering to a second protein present in the cell in another cell identical to the cell in step S110 (S160).
  • the second fluorescent protein may be attached or linked to the second protein by a physicochemical method.
  • the above-described step S160 may be performed in advance with the above-described step S110 for the smooth progress of the analysis, in the practice of the present invention, since the second fluorescent protein preferably has a different wavelength range than the first fluorescent protein
  • the second fluorescent protein may be an eGFP (enhanced Green Fluorescent Protein).
  • step S160 the analyst supplies the entire cytoplasmic stock solution of the cell in which the second fluorescent protein is expressed in the second protein inside in step S160 (S170).
  • step S170 not only the cellular stock solution, but also a cell solution such as a cell stock solution, diluted cellular stock solution, or diluted cell stock solution may be used.
  • the first protein is bound to the plurality of first fluorescent protein binding antibodies attached to the surface of the substrate, and when the entire cytoplasmic stock solution containing the second protein is supplied to the surface of the substrate, The first protein on the substrate surface interacts with the second protein in the same state as in the intracellular environment where the second protein in the cytoplasm and other proteins in whole cell lysate coexist. do.
  • each first protein coupled via a first fluorescent protein to each antibody attached on the substrate surface as shown in FIG. 4 is at the single molecule level in the same state as in the second protein and the intracellular environment. There is an interaction of repeating joining and separating.
  • the first protein and the second protein are detected by detecting a fluorescence signal of a specific wavelength band (520 nm) generated from the second fluorescent protein (eGFP) located on the surface of the substrate through the binding between the first protein and the second protein.
  • the binding state can be confirmed, and the analyst continuously observes the change in wavelength of each antibody attached on the surface of the substrate so that the interaction between the first protein and the second protein, such as the frequency of binding and separation of the first protein Can be analyzed at the level (S180).
  • the interaction between the first protein and the second protein such as the frequency of binding and separation of the cell It can be analyzed in the same environment as the environment.
  • the second protein that is not bound to the first protein can also move near the surface of the substrate during the floating movement in the cellular stock solution supplied to the substrate, and even in this case, it is expressed in the second protein when the surface is observed through a total reflection microscope With the second fluorescent protein, eGFP, the wavelength at the substrate surface is changed from 473 nm to 520 nm, which may lead to the problem of an error in interaction analysis.
  • the second protein which is not bound to the first protein and floats in the cytoplasmic stock solution, has a very high rate of movement in the cytoplasmic stock solution, so that even if the second protein temporarily approaches the surface of the substrate during the suspension movement, within the time interval of the integration measurement. This is because the substrate deviates from the substrate surface again.
  • the second protein is treated so as not to bind with the first protein, so that all the second proteins are suspended in the cytosolic solution without the second protein bound to the first protein.
  • the change As a result of integrating the change into an integration section of 50 msec, it was confirmed experimentally that no wavelength change was observed.
  • the protein-protein interaction analysis value in the above-described step S180 is secured as the first analysis value, and the protein-protein interaction analysis value in another environment described later as the second analysis value. It may be possible to perform a comparative analysis of the two.
  • the tester secures the above-described interaction analysis value in the above-described step S180 as the first analysis value, and then repeats the above-described steps S110 to S160 in the same manner.
  • the tester does not supply the cytoplasmic stock solution of the cell in which the second fluorescent protein is expressed in the second protein therein to the substrate, but instead of the cytoplasmic stock solution of the cell.
  • the mixed cytoplasmic stock solution obtained by mixing the cytoplasmic stock solution of another analysis target such as cancer cells is supplied to the substrate (S190).
  • mixed cell solutions such as mixed cell stock, diluted mixed cytoplasm stock, or diluted mixed cell stock may be used.
  • the first protein is bound to the plurality of first fluorescent protein binding antibodies attached to the surface of the substrate, respectively, and the cytoplasmic solution containing the second protein is mixed with the cytoplasmic stock solution to be analyzed.
  • the mixed cytoplasmic stock solution is supplied to the surface of the substrate, the first protein on the substrate surface expresses not only the second protein expressing the second fluorescent protein contained in the mixed cytoplasm stock solution, but also the second fluorescent protein in the cell to be analyzed.
  • the second protein which is not present, and other proteins (Native proteins in whole cell lysate) will interact with the second protein in a coexisting environment.
  • the second protein in which the second fluorescent protein is expressed is competitive with the first protein on the substrate surface in the state of coexisting with the second protein in which the second fluorescent protein is not expressed in the cell to be analyzed. To interact.
  • the second protein in which the second fluorescent protein is expressed by another protein in the cell to be analyzed is affected by the interaction with the first protein.
  • the degree of influence by the other protein in the cell to be analyzed or the second protein in the cell to be analyzed may be determined by observing the surface of the substrate through an optical device that generates a near field such as a total reflection microscope as in the step S180 described above.
  • the interactions such as the frequency of binding and separation of the first protein and the second protein on which the second fluorescent protein is expressed on the substrate surface can be confirmed by analyzing at a single molecule level (S195).
  • the investigator compares the first analysis value described above with the second analysis value which is the analysis value at step S195 described above, and thereby the second protein in another cell in the interaction of the second protein with the first protein. And the extent of effects such as the promotion or interference of interaction by other proteins in other cells.
  • FIG. 5 is a flowchart illustrating a method for analyzing protein-protein interaction according to another embodiment of the present invention.
  • the first protein is not expressed in the first protein and is not a first fluorescent protein-binding antibody on the substrate.
  • the interaction between the first protein and the second protein in the state in which the first protein is directly bound to the antibody attached to the substrate is analyzed.
  • a first protein binding antibody which is an antibody bound to a first protein, is attached together to a substrate that is a polyethylene slide (Quartz Slide) coated with polyethylene glycol (PEG) (S210).
  • a biomolecular sieve that binds to a first protein such as a liposome having DNA, RNA, a specific component that binds to the protein, or the like may be used as the antibody to bind to the first protein.
  • a first protein such as a liposome having DNA, RNA, a specific component that binds to the protein, or the like
  • the analyst induces the binding of the first protein and the first protein-binding antibody (S230) by supplying the substrate of the cytoplasm of the cell containing the first protein to the substrate (S220).
  • step S220 not only the cellular stock solution, but also a cell solution such as a cell stock solution, diluted cytoplasm stock, or diluted cell stock may be used.
  • the analyst may be pre-processed to express a predetermined fluorescent protein such as m-Cherry in the first protein, in this case the first protein binding antibody and the first protein is bound
  • a predetermined fluorescent protein such as m-Cherry in the first protein
  • the analyst observes the surface of the substrate by using a total reflection microscope
  • the analyst analyzes the surface of the substrate using a total reflection microscope
  • the analyzer analyzes the surface of the substrate and changes the wavelength of the first fluorescent protein expressed in the first protein. You can check whether it is combined.
  • the analyst supplies a buffer solution to the substrate, thereby restoring the remaining substances contained in the cellular stock except for the first protein on the substrate. It will be removed (S240).
  • the analyst manipulates the fluorescent protein to be expressed through genetic engineering to the second protein present in the cell in another cell identical to the cell described above (S250).
  • step S250 may be performed before the above-mentioned step S210 to facilitate the progress of the analysis, in the practice of the present invention, it will be preferable that the fluorescent protein expressed in the second protein also eGFP.
  • the analyst supplies the entire cytoplasmic stock solution of the cell in which the fluorescent protein is expressed in the internal second protein in step S250 (S260).
  • a cell solution such as a cell stock solution, a diluted cellular stock solution, or a diluted cell stock solution may be used.
  • the first protein is bound to the plurality of first protein-binding antibodies attached to the surface of the substrate, and when the whole cellular stock solution containing the second protein is supplied to the surface of the substrate, the first protein on the surface of the substrate is Interacts with the second protein contained in the cellular stock solution in the same state as in the intracellular environment.
  • each first protein bound to each antibody attached on the substrate surface interacts with the second protein repeatedly binding and separation at the single molecule level in the same state as in the intracellular environment.
  • eGFP is a fluorescent protein expressed in the second protein.
  • the wavelength at the substrate surface is changed from 473 nm to 520 nm, and the change in the wavelength enables confirmation of the binding state between the first protein and the second protein.
  • S270 single molecule level
  • the protein-protein interaction analysis value in the above step S270 is ensured as the first analysis value, which will be described later Comparative analysis of the two may be performed by obtaining the protein-protein interaction analysis value in the other environment as the second analysis value.
  • the tester secures the above-described interaction analysis value in the above-described step S270 as the first analysis value, and then repeats the above-described steps S210 to S250 in the same manner.
  • the tester does not supply the cytoplasmic stock of the cell in which the second fluorescent protein is expressed in the second protein therein to the substrate, but not with the cytoplasmic stock of the cell.
  • the mixed cytoplasmic stock solution which is a mixture of separate cytoplasmic stock solutions, such as cancer cells, is supplied to the substrate (S280).
  • mixed cell solutions such as mixed cell stock, diluted mixed cytoplasm, or diluted mixed cell stock may be used.
  • the first protein is bound to the plurality of first protein-binding antibodies attached to the surface of the substrate, and the mixed cytoplasmic solution containing the cytoplasmic solution containing the second protein and the cytoplasmic solution to be analyzed is the surface of the substrate.
  • the first protein on the substrate surface is not only a second protein expressing the second fluorescent protein contained in the mixed cytoplasm stock solution, but also a second protein not expressing the second fluorescent protein in the cell to be analyzed and the like.
  • Other proteins in the cell Native proteins in whole cell lysate will interact with the second protein in the environment.
  • the second protein in which the second fluorescent protein is expressed is competitive with the first protein on the substrate surface in the state of coexisting with the second protein in which the second fluorescent protein is not expressed in the cell to be analyzed. To interact.
  • the second protein in which the second fluorescent protein is expressed by another protein in the cell to be analyzed is affected by the interaction with the first protein.
  • the degree of influence by the other protein in the cell to be analyzed or the second protein in the cell to be analyzed may be determined by observing the surface of the substrate through an optical device that generates a near field such as a total reflection microscope as in the step S270 described above.
  • the interactions such as the frequency of binding and separation of the first protein on the substrate surface and the second protein on which the second fluorescent protein is expressed can be confirmed by analyzing at a single molecule level (S290).
  • the investigator compares the first analysis value described above with the second analysis value which is the analysis value at step S290 described above, and thereby the second protein in another cell in interaction with the first protein of the second protein. And the extent of effects such as the promotion or interference of interaction by other proteins in other cells.
  • FIGS. 1 to 5 the method for analyzing protein-protein interaction according to the present invention in FIGS. 1 to 5 described above is performed in an analysis apparatus having the structure in FIG. 6.
  • the protein-protein interaction analysis device 300 includes an optical excitation unit 320, a sample loading unit 310, an optical measuring unit 330, a signal analyzing unit 340, and a signal.
  • the diagnosis unit 360 and the storage unit 350 are included.
  • the sample loading unit 310 is loaded with the substrate used in the protein-protein interaction analysis method described above in the present invention.
  • the optical excitation portion 320 generates a near field having a first wavelength on the surface of the substrate loaded in the sample loading portion.
  • the optical measuring unit 330 is the first protein on the substrate surface in accordance with the interaction of the first protein attached to the substrate surface and the second protein provided with a fluorescent protein in a state in which the cellular stock solution or mixed cytoplasm stock solution is supplied to the substrate Sensing a change in wavelength from the wavelength to the second wavelength.
  • the first wavelength when the fluorescent protein included in the second protein is eGFP, the first wavelength will be 473 nm and the second wavelength will be 520 nm.
  • the optical measuring unit 330 not only measures the fluorescence signal of the second wavelength for a predetermined time, but also measures the fluorescence signal of the second wavelength in real time in the presence of the cellular stock solution or the mixed cytoplasm stock solution, It would be desirable to have monomolecular sensitivity in the measurement.
  • the signal analyzer 340 analyzes the fluorescence signal of the second wavelength measured by the optical measuring unit 330 through image processing to calculate an analysis value, and stores the calculated analysis value in the storage unit 350. .
  • the signal analyzer 340 is individually based on the fluorescence signal of the second wavelength measured by the optical measuring unit 330 in each situation in which various cytoplasmic solutions such as cytoplasmic stock solution or mixed cytoplasmic stock solution are supplied to the substrate.
  • the calculated analysis value is stored in the storage 350.
  • the signal analyzer 340 may display the signal indicated by the red line in FIG. 7 among the measured fluorescence signals. Find the baseline.
  • the signal low rises between approximately 10 to 20 seconds, which means that the cellular stock solution or the mixed cytoplasmic stock containing the second protein arrives at the imaging area of the optical measuring unit 330.
  • the signal analyzer 340 measures fluctuation, ie, noise, which occurs around an elevated signal baseline, and then defines meaningful protein-protein interactions based on the fluctuation. Set the threshold.
  • the noise generated around the signal low is formed by the behavior of the second proteins that are continuously moving quickly without interaction between the proteins, and the signal analyzer 340 may be exceeded by the noise that is not related to the interaction. Set the reference point to an unknown value.
  • the signal analyzer 340 determines that there is a meaningful interaction between the first protein and the second protein at the corresponding time point, and the duration of the interaction ( ⁇ off ), and The time until the next binding between the first protein and the second protein ⁇ on is measured and stored in the storage 350 as an analysis value.
  • the analysis of the protein-protein interaction through the analysis of the time ( ⁇ off ) and the time until the next binding of the first protein and the second protein ( ⁇ on ) obtained by the signal analyzer 340 is performed.
  • a series of information can be obtained, and the signal diagnosis unit 360 compares and analyzes the analytical values calculated in each situation in which various cytoplasmic solutions are supplied to the substrate.
  • the medical diagnosis is performed according to a predetermined diagnosis algorithm.

Abstract

Disclosed is a device for analyzing protein-protein interactions at levels up to the single molecular level. The device of the present invention is provided with a sample-loading unit, a light-excitation unit which emits near-field radiation having a first wavelength onto the surface of a substrate loaded on the sample-loading unit, and a light-measuring unit, wherein the sample-loading unit loads a substrate onto which a first protein-bound molecule, i.e. a biological molecule to which a first protein is bound, is adhered, and the light-measuring unit detects a conversion of the first wavelength to a second wavelength on the surface of the substrate due to an interaction between the first protein and a second protein when a cell solution is provided to the substrate. According to the present invention, a protein-protein interaction in an actual cell environment can be analyzed at levels up to the single molecular level.

Description

세포 환경 내에서의 단일 분자 수준의 단백질-단백질 상호작용 분석 장치Single-molecule-level protein-protein interaction analysis device in cellular environment
본 발명은 단백질-단백질 상호작용 분석 장치에 관한 것으로, 더욱 상세하게는 실제 세포 환경 내에서의 단백질-단백질 상호작용을 단일 분자 수준까지 분석할 수 있을 뿐만 아니라, 실제 세포 환경 내에서 다른 단백질이 관여된 경우에 특정 단백질-단백질 상호작용에 대한 영향도를 분석할 수 있는 단백질-단백질 상호작용 분석 장치에 관한 것이다. The present invention relates to an apparatus for analyzing protein-protein interactions, and more particularly, to analyze protein-protein interactions in a real cell environment down to a single molecule level, and to involve other proteins in a real cell environment. In this case, the present invention relates to a protein-protein interaction analysis device capable of analyzing the influence on a specific protein-protein interaction.
세포는 다양하고 복잡한 단백질-단백질 상호작용을 통하여 유전자 표현, 세포성장, 세포 주기, 대사, 신호전달 등의 여러 생물학적 기능을 수행함으로써 생명현상을 유지하고 있다. 따라서 세포내에서의 단백질-단백질 상호작용 및 상호작용의 기능을 이해하는 것은 생명현상들을 이해하는 초석이 되며 신약개발 및 질병 치료의 중요한 기반이 된다. Cells maintain life by performing various biological functions such as gene expression, cell growth, cell cycle, metabolism, and signaling through diverse and complex protein-protein interactions. Thus, understanding protein-protein interactions and their functions within cells is the cornerstone of understanding life phenomena and an important foundation for drug development and disease treatment.
시험관 내에서 단백질-단백질 상호작용을 조사하기 위한 방법으로는 대표적인 방법으로는 친화성 크로마토 그래피(affinity chromoatography) 방법이 있다.A typical method for investigating protein-protein interactions in vitro is affinity chromoatography.
단백질 친화성 크로마토그래피(Protein affinity chromatography)의 경우, 정제된 단백질이 준비되어야하는 어려움이 있다. 또한 단백질 간 상호작용 확인이 시험관 내에서 일어나므로, 세포내에서는 상호작용하지 않는 단백질들이 컬럼을 통과하는 동안 정전기적 상호작용에 의하여 결합하는 것처럼 보일 수 있는 false-positive 결과를 도출 할 수 있다. In the case of protein affinity chromatography, there is a difficulty in preparing purified protein. In addition, the confirmation of protein-to-protein interactions occurs in vitro, resulting in false-positive results that may appear to bind by electrostatic interactions during non-interacting proteins in the cell.
즉, 정량적 측정을 위해서 종래 기술에 따른 단백질-단백질 상호작용을 조사하기 위한 방법은 단백질-단백질 상호작용을 분석하기 위해서 세포 내에 존재하는 각각의 단백질을 정제하여 이들을 세포 내의 다른 물질들과 분리한 상태에서 상호작용을 분석하기 때문에, 다른 단백질 등이 혼재되어 있는 실제 세포 환경 내에서의 단백질-단백질 상호작용을 단일 분자 수준에서 분석할 수는 없다는 한계가 있다.In other words, the method for investigating protein-protein interaction according to the prior art for quantitative measurement is to purify each protein present in the cell and to separate them from other substances in the cell in order to analyze the protein-protein interaction. Because of their interaction analysis, the protein-protein interaction in the real cellular environment in which other proteins and the like are mixed cannot be analyzed at the single molecule level.
뿐만 아니라, 종래 기술에 따른 단백질-단백질 상호작용을 조사하기 위한 방법은 실제 세포 환경 내에서 기타의 다른 단백질이 관여된 경우에 특정 단백질-단백질 상호작용에 대한 영향도를 분석할 수 없다는 한계가 있다.In addition, the method for investigating protein-protein interactions according to the prior art has a limitation in that it is not possible to analyze the influence on specific protein-protein interactions when other proteins are involved in the actual cellular environment. .
따라서, 본 발명의 목적은, 실제 세포 환경 내에서의 단백질-단백질 상호작용을 단일 분자 수준까지 분석할 수 있을 뿐만 아니라, 실제 세포 환경 내에서 다른 단백질이 관여된 경우에 특정 단백질-단백질 상호작용에 대한 영향도를 분석할 수 있는 단백질-단백질 상호작용 분석 장치를 제공함에 있다.Thus, the object of the present invention is not only to analyze protein-protein interactions in the real cellular environment down to the single molecule level, but also to specific protein-protein interactions when other proteins are involved in the real cellular environment. It is to provide a protein-protein interaction analysis device that can analyze the impact on.
상기 목적을 달성하기 위한 본 발명에 따른 단백질-단백질 상호작용 분석 장치는, 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준까지 분석하기 위한 장치에 있어서, 상기 제1 단백질에 구비된 제1 표지자와 결합되는 생체 분자체가 부착된 기판이 로딩되는 시료 로딩부 -상기 기판에 상기 제1 단백질을 공급하여 상기 제1 표지자와 상기 생체 분자체의 결합이 유도되며, 상기 제1 표지자와 상기 생체 분자체가 결합된 경우에, 제2 표지자가 구비된 제2 단백질이 포함된 세포의 세포 용액이 상기 기판에 공급됨-; 상기 시료 로딩부에 로딩된 상기 기판의 표면에 제1 파장을 갖는 근접장을 발생시키는 광학 여기부; 및 상기 세포 용액이 상기 기판에 공급된 상태에서, 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하는 광학 측정부를 포함한다.Protein-protein interaction analysis device according to the present invention for achieving the above object, in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, the first protein provided in the first protein Sample loading unit is loaded with a substrate attached to the biomolecule sieve is bonded to the marker-by supplying the first protein to the substrate is coupled to the first marker and the biomolecule sieve, the first marker and the living body When molecular sieves are bound, a cell solution of cells containing a second protein with a second marker is supplied to the substrate; An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion; And an optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate. do.
바람직하게는, 상기 광학 측정부는, 상기 제2 파장의 형광 신호를 소정의 시간 동안 적분 측정하는 것을 특징으로 한다.Preferably, the optical measuring unit, characterized in that for measuring the integral of the fluorescent signal of the second wavelength for a predetermined time.
또한, 상기 광학 측정부는, 상기 기판에 상기 공급된 세포 용액이 존재하는 상황에서, 상기 제2 파장의 형광 신호를 실시간 측정하는 것을 특징으로 한다.The optical measuring unit may measure the fluorescent signal of the second wavelength in real time in the presence of the supplied cell solution on the substrate.
또한, 상기 제1 표지자, 및 상기 제2 표지자는 서로 다른 파장을 갖는 형광 단백질인 것을 특징으로 한다.In addition, the first marker and the second marker is characterized in that the fluorescent protein having a different wavelength.
또한, 상기 광학 측정부가 측정한 상기 제2 파장의 형광 신호를 이미지 프로세싱을 통해 분석하는 신호 분석부를 더 포함한다.The apparatus may further include a signal analyzer configured to analyze the fluorescent signal of the second wavelength measured by the optical measurer through image processing.
한편, 본 발명에 따른 단백질-단백질 상호작용 분석 장치는, 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준까지 분석하기 위한 장치에 있어서, 상기 제1 단백질에 구비된 제1 표지자와 결합되는 생체 분자체가 부착된 기판이 로딩되는 시료 로딩부 -상기 기판에 상기 제1 단백질을 공급하여 상기 제1 표지자와 상기 생체 분자체의 결합을 유도하고, 상기 제1 표지자와 상기 생체 분자체가 결합된 경우에, 제2 표지자가 구비된 제2 단백질이 포함된 세포의 세포 용액이 상기 기판에 공급됨-; 상기 시료 로딩부에 로딩된 상기 기판의 표면에 제1 파장을 갖는 근접장을 발생시키는 광학 여기부; 상기 세포 용액이 상기 기판에 공급된 상태에서, 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하는 광학 측정부; 및 상기 광학 측정부가 측정한 상기 제2 파장의 형광 신호를 이미지 프로세싱을 통해 분석하여 제1 분석값을 획득하는 신호 분석부를 포함하며, 상기 시료 로딩부에는 상기 제1 단백질에 구비된 제1 표지자와 결합되는 생체 분자체가 부착된 새로운 기판이 로딩되고, 상기 새로운 기판에 상기 세포 용액과 분석 대상 세포 용액을 혼합한 혼합 세포 용액이 공급되고, 상기 혼합 세포 용액이 상기 새로운 기판에 공급된 상태에서, 상기 광학 측정부는 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하며, 상기 신호 분석부는 상기 광학 측정부가 측정한 상기 제2 파장의 형광 신호를 이미지 프로세싱을 통해 분석하여 제2 분석값을 획득하는 것을 특징으로 한다.On the other hand, the protein-protein interaction analysis device according to the present invention, in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, is coupled to the first marker provided in the first protein Sample loading unit is loaded with a substrate on which the biomolecule sieve is attached-supplying the first protein to the substrate to induce binding of the first marker and the biomolecule sieve, the first marker and the biomolecule sieve is coupled Where provided, a cell solution of cells containing a second protein with a second marker is supplied to the substrate; An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion; An optical measuring unit configured to sense a change of the first wavelength to a second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate; And a signal analyzer configured to analyze the fluorescence signal of the second wavelength measured by the optical measuring unit through image processing to obtain a first analysis value, wherein the sample loading unit includes a first marker provided in the first protein. With the new substrate attached with the biomolecular sieve attached thereto being loaded, a mixed cell solution obtained by mixing the cell solution and the analyte cell solution supplied to the new substrate, and the mixed cell solution supplied to the new substrate, The optical measuring unit detects the change of the first wavelength to the second wavelength on the surface of the substrate according to the interaction of the first protein and the second protein, and the signal analyzing unit measures the first measured by the optical measuring unit The fluorescence signal of two wavelengths may be analyzed through image processing to obtain a second analysis value.
한편, 본 발명에 따른 단백질-단백질 상호작용 분석 장치는, 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준까지 분석하기 위한 장치에 있어서, 상기 제1 단백질이 결합되는 생체 분자체인 제1 단백질 결합 분자체가 부착된 기판이 로딩되는 시료 로딩부 -상기 기판에 상기 제1 단백질을 공급하여 상기 제1 단백질과 상기 제1 단백질 결합 분자체의 결합을 유도하며, 상기 제1 단백질과 상기 제1 단백질 결합 분자체가 결합된 경우에, 표지자가 구비된 제2 단백질이 포함된 세포의 세포 용액이 상기 기판에 공급됨-; 상기 시료 로딩부에 로딩된 상기 기판의 표면에 제1 파장을 갖는 근접장을 발생시키는 광학 여기부; 상기 세포 용액이 상기 기판에 공급된 상태에서, 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하는 광학 측정부; 및On the other hand, the protein-protein interaction analysis device according to the present invention, in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, the first protein which is a biomolecular sieve to which the first protein is bound A sample loading unit in which a substrate having a binding molecular sieve attached is loaded. The sample loading unit is supplied to the substrate to induce binding of the first protein and the first protein binding molecular sieve. When a protein binding molecular sieve is bound, a cellular solution of cells containing a second protein with a marker is supplied to the substrate; An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion; An optical measuring unit configured to sense a change of the first wavelength to a second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate; And
상기 광학 측정부가 측정한 상기 제2 파장의 형광 신호를 이미지 프로세싱을 통해 분석하여 제1 분석값을 획득하는 신호 분석부를 포함하며, 상기 시료 로딩부에는 상기 제1 단백질이 결합되는 생체 분자체인 제1 단백질 결합 분자체가 부착된 새로운 기판이 로딩되고, 상기 새로운 기판에 상기 세포 용액과 분석 대상 세포 용액을 혼합한 혼합 세포 용액이 공급되고, 상기 혼합 세포 용액이 상기 새로운 기판에 공급된 상태에서, 상기 광학 측정부는 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하며, 상기 신호 분석부는 상기 광학 측정부가 측정한 상기 제2 파장의 형광 신호를 이미지 프로세싱을 통해 분석하여 제2 분석값을 획득하는 것을 특징으로 한다.And a signal analyzer configured to analyze the fluorescence signal of the second wavelength measured by the optical measuring unit through image processing to obtain a first analysis value, wherein the sample loading unit is a biomolecular sieve to which the first protein is bound. With a new substrate to which a protein binding molecular sieve is attached is loaded, a mixed cell solution obtained by mixing the cell solution and the analyte cell solution is supplied to the new substrate, and the mixed cell solution is supplied to the new substrate. The optical measuring unit detects the change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein, and the signal analyzing unit measures the second measured by the optical measuring unit The fluorescent signal having the wavelength may be analyzed through image processing to obtain a second analysis value.
바람직하게는, 상기 제1 분석값과 상기 제2 분석값을 비교분석하는 신호 진단부를 더 포함한다.Preferably, the apparatus further includes a signal diagnosis unit for comparing and analyzing the first analysis value and the second analysis value.
또한, 상기 광학 측정부는, 상기 제2 파장의 형광 신호를 소정의 시간 동안 적분 측정하는 것을 특징으로 한다.The optical measuring unit may integrally measure the fluorescent signal having the second wavelength for a predetermined time.
또한, 상기 광학 측정부는, 상기 기판에 상기 공급된 세포 용액이 존재하는 상황에서, 상기 제2 파장의 형광 신호를 실시간 측정하는 것을 특징으로 한다.The optical measuring unit may measure the fluorescent signal of the second wavelength in real time in the presence of the supplied cell solution on the substrate.
또한, 상기 제1 표지자, 및 상기 제2 표지자는 서로 다른 파장을 갖는 형광 단백질인 것을 특징으로 한다.In addition, the first marker and the second marker is characterized in that the fluorescent protein having a different wavelength.
한편, 본 발명에 따른 단백질-단백질 상호작용 분석 장치는, 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준까지 분석하기 위한 장치에 있어서, 상기 제1 단백질이 결합되는 생체 분자체인 제1 단백질 결합 분자체가 부착된 기판이 로딩되는 시료 로딩부 -상기 기판에 상기 제1 단백질을 공급하여 상기 제1 단백질과 상기 제1 단백질 결합 분자체의 결합을 유도하고, 상기 제1 단백질과 상기 제1 단백질 결합 분자체가 결합된 경우에, 표지자가 구비된 제2 단백질이 포함된 세포의 세포 용액이 상기 기판에 공급됨-; 상기 시료 로딩부에 로딩된 상기 기판의 표면에 제1 파장을 갖는 근접장을 발생시키는 광학 여기부; 및 상기 세포 용액이 상기 기판에 공급된 상태에서, 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하는 광학 측정부를 포함하며, 상기 광학 측정부는, 상기 제2 파장의 형광 신호를 소정의 시간 동안 적분 측정하는 것을 특징으로 한다.On the other hand, the protein-protein interaction analysis device according to the present invention, in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, the first protein which is a biomolecular sieve to which the first protein is bound A sample loading unit in which a substrate having a binding molecular sieve attached is loaded-The first protein is supplied to the substrate to induce binding of the first protein and the first protein binding molecular sieve, and the first protein and the first protein are loaded. When a protein binding molecular sieve is bound, a cellular solution of cells containing a second protein with a marker is supplied to the substrate; An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion; And an optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate. The optical measuring unit may integrally measure the fluorescent signal of the second wavelength for a predetermined time.
한편, 본 발명에 따른 단백질-단백질 상호작용 분석 장치는, 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준까지 분석하기 위한 장치에 있어서, 상기 제1 단백질이 결합되는 생체 분자체인 제1 단백질 결합 분자체가 부착된 기판이 로딩되는 시료 로딩부 -상기 기판에 상기 제1 단백질을 공급하여 상기 제1 단백질과 상기 제1 단백질 결합 분자체의 결합을 유도하고, 상기 제1 단백질과 상기 제1 단백질 결합 분자체가 결합된 경우에, 표지자가 구비된 제2 단백질이 포함된 세포의 세포 용액이 상기 기판에 공급됨-; 상기 시료 로딩부에 로딩된 상기 기판의 표면에 제1 파장을 갖는 근접장을 발생시키는 광학 여기부; 및 상기 세포 용액이 상기 기판에 공급된 상태에서, 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하는 광학 측정부를 포함하며, 상기 광학 측정부는, 상기 기판에 상기 공급된 세포 용액이 존재하는 상황에서, 상기 제2 파장의 형광 신호를 실시간 측정하는 것을 특징으로 한다.On the other hand, the protein-protein interaction analysis device according to the present invention, in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, the first protein which is a biomolecular sieve to which the first protein is bound A sample loading unit in which a substrate having a binding molecular sieve attached is loaded-The first protein is supplied to the substrate to induce binding of the first protein and the first protein binding molecular sieve, and the first protein and the first protein are loaded. When a protein binding molecular sieve is bound, a cellular solution of cells containing a second protein with a marker is supplied to the substrate; An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion; And an optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate. The optical measuring unit may measure the fluorescence signal of the second wavelength in real time in the presence of the supplied cell solution on the substrate.
한편, 본 발명에 따른 단백질-단백질 상호작용 분석 장치는, 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준까지 분석하기 위한 장치에 있어서, 상기 제1 단백질이 결합되는 생체 분자체인 제1 단백질 결합 분자체가 부착된 기판이 로딩되는 시료 로딩부 -상기 기판에 상기 제1 단백질을 공급하여 상기 제1 단백질과 상기 제1 단백질 결합 분자체의 결합을 유도하고, 상기 제1 단백질과 상기 제1 단백질 결합 분자체가 결합된 경우에, 표지자가 구비된 제2 단백질이 포함된 세포의 세포 용액이 상기 기판에 공급됨-; 상기 시료 로딩부에 로딩된 상기 기판의 표면에 제1 파장을 갖는 근접장을 발생시키는 광학 여기부; 및 상기 세포 용액이 상기 기판에 공급된 상태에서, 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하는 광학 측정부를 포함하며, 상기 광학 측정부가 측정한 상기 제2 파장의 형광 신호를 이미지 프로세싱을 통해 분석하는 신호 분석부를 더 포함한다.On the other hand, the protein-protein interaction analysis device according to the present invention, in the device for analyzing the interaction of the first protein and the second protein to a single molecule level, the first protein which is a biomolecular sieve to which the first protein is bound A sample loading unit in which a substrate having a binding molecular sieve attached is loaded-The first protein is supplied to the substrate to induce binding of the first protein and the first protein binding molecular sieve, and the first protein and the first protein are loaded. When a protein binding molecular sieve is bound, a cellular solution of cells containing a second protein with a marker is supplied to the substrate; An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion; And an optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate. The apparatus may further include a signal analyzer configured to analyze the fluorescent signal of the second wavelength measured by the optical measuring unit through image processing.
본 발명에 따르면, 실제 세포 환경 내에서의 단백질-단백질 상호작용을 단일 분자 수준까지 분석할 수 있게 된다.According to the present invention, protein-protein interactions in the actual cellular environment can be analyzed up to the single molecule level.
아울러, 본 발명에 따르면, 실제 세포 환경 내에서 다른 단백질이 관여된 경우에 특정 단백질-단백질 상호작용에 대한 영향도를 분석할 수 있게 된다.In addition, according to the present invention, it is possible to analyze the influence on specific protein-protein interactions when other proteins are involved in the actual cellular environment.
도 1은 본 발명의 일 실시예에 따른 단백질-단백질 상호작용 분석 장치에서의 분석 방법을 설명하는 절차 흐름도,1 is a flowchart illustrating a method of analysis in a protein-protein interaction analysis device according to an embodiment of the present invention;
도 2 내지 도 4는 본 발명의 일 실시예에 따른 단백질-단백질 상호작용 분석 방법의 각 단계를 설명하는 도면, 2 to 4 are diagrams illustrating each step of the protein-protein interaction analysis method according to an embodiment of the present invention,
도 5는 본 발명의 다른 실시예에 따른 단백질-단백질 상호작용 분석 방법을 설명하는 절차 흐름도, 5 is a flowchart illustrating a method for analyzing protein-protein interactions according to another embodiment of the present invention;
도 6은 도 1 내지 도 5에서의 단백질-단백질 상호작용 분석 방법이 실행되는 분석 장치의 구조를 나타내는 기능 블록도, 및FIG. 6 is a functional block diagram showing the structure of an assay apparatus in which the protein-protein interaction analysis method in FIGS. 1 to 5 is executed; and
도 7은 본 발명에 따른 단백질-단백질 상호작용 분석 장치의 광학 측정부가 측정한 신호를 나타낸 도면이다.7 is a view showing a signal measured by the optical measuring unit of the protein-protein interaction analysis device according to the present invention.
이하에서는 도면을 참조하여 본 발명을 보다 상세하게 설명한다. 도면들 중 동일한 구성요소들은 가능한 한 어느 곳에서든지 동일한 부호들로 나타내고 있음에 유의해야 한다. 또한 본 발명의 요지를 불필요하게 흐릴 수 있는 공지 기능 및 구성에 대한 상세한 설명은 생략한다.Hereinafter, with reference to the drawings will be described the present invention in more detail. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.
도 1은 본 발명의 일 실시예에 따른 단백질-단백질 상호작용 분석 장치에서의 분석 방법을 설명하는 절차 흐름도이다. 도 1을 참조하여, 본 발명의 일 실시예에 따른 단백질-단백질 상호작용 분석 장치에서의 분석 방법을 설명하면, 먼저, 분석자는 특정한 두 개의 단백질인 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준까지 분석하기 위해서, 세포 상태에서 유전자 조작 과정을 거쳐 해당 세포 내에 존재하는 제1 단백질에 표지자로서 제1 형광 단백질이 발현되도록 한다(S110). 한편, 본 발명을 실시함에 있어서는, 제1 형광 단백질을 물리 화학적인 방법에 의해서 제1 단백질에 부착 또는 연결시킬 수도 있을 것이다.1 is a flowchart illustrating an analysis method in a protein-protein interaction analysis device according to an embodiment of the present invention. Referring to Figure 1, when explaining the analysis method in the protein-protein interaction analysis device according to an embodiment of the present invention, first, the analyst has a single interaction between the two specific proteins, the first protein and the second protein In order to analyze up to the molecular level, the first fluorescent protein as a marker is expressed on the first protein existing in the cell through genetic engineering in the cellular state (S110). Meanwhile, in practicing the present invention, the first fluorescent protein may be attached or linked to the first protein by a physicochemical method.
본 발명에 따른 실험에 있어서, 제1 단백질은 h-Ras 단백질이고, 제2 단백질은 C-Raf의 Ras-binding domain(RBD) 단백질이며, 제1 형광 단백질은 m-Cherry 단백질로 하였다.In the experiment according to the present invention, the first protein was h-Ras protein, the second protein was Ras-binding domain (RBD) protein of C-Raf, and the first fluorescent protein was m-Cherry protein.
그 다음 분석자는 폴리에틸렌 글리콜(polyethyleneglycol:PEG) 코팅처리된 퀄츠 슬라이드(Quartz Slide)인 기판에, 전술한 S110 단계에서 제1 단백질에 표지자로서 발현된 제1 형광 단백질과 결합되는 항체인 제1 형광 단백질 결합항체를 도 2에서와 같이 부착한다(S120).The analyst then analyzed the first fluorescent protein, which is an antibody that binds to the first fluorescent protein expressed as a marker on the first protein in step S110, on a substrate that is a polyethyleneglycol (PEG) coated Quartz slide. The binding antibody is attached as in FIG. 2 (S120).
한편, 본 발명을 실시함에 있어서는, 제1 형광 단백질과 결합하는 항체에는, 항체 이외에도 DNA, RNA, 단백질과 결합하는 특정 성분을 갖는 리포좀(liposome) 등의 제1 형광 단백질과 결합하는 생체 분자체가 사용될 수 있을 것이다.On the other hand, in the practice of the present invention, the antibody which binds to the first fluorescent protein includes, in addition to the antibody, a biomolecular sieve that binds to a first fluorescent protein such as a liposome having a specific component that binds to DNA, RNA, and protein. Could be used.
그 다음, 분석자는 전술한 S110 단계에서 준비해 놓은, 내부의 제1 단백질에 제1 형광 단백질이 발현되어 있는 세포의 세포질 원액을 기판에 공급함으로써(S130), 제1 단백질에 발현된 제1 형광 단백질과 제1 형광 단백질 결합항체의 결합을 유도한다(S140).Next, the analyst supplies the cytoplasmic stock solution of cells in which the first fluorescent protein is expressed in the internal first protein prepared in step S110 to the substrate (S130), thereby expressing the first fluorescent protein expressed in the first protein. Induces the binding of the first fluorescent protein binding antibody (S140).
한편, 전술한 S130 단계를 실시함에 있어서 세포질 원액뿐만 아니라, 세포 원액, 희석된 세포질 원액, 또는 희석된 세포 원액 등의 세포 용액이 사용될 수 있을 것이다.On the other hand, in performing the above-described step S130, not only the cellular stock solution, but also a cell solution such as a cell stock solution, diluted cytoplasm stock solution, or diluted cell stock solution may be used.
도 3에서와 같이, 기판상에 부착된 제1 형광 단백질 결합항체와 제1 형광 단백질이 결합된 경우에 분석자가 전반사 현미경을 이용한 기판의 표면 관찰을 수행하면, 분석자는 제1 형광 단백질에 의한 파장 변화로부터(즉, 제1 형광 단백질로부터 발생하는 개개의 단분자 신호를 측정하여) 기판상에 부착된 복수개의 제1 형광 단백질 결합항체에 제1 형광 단백질이 결합되었는지 여부를 확인할 수 있게 된다.As shown in FIG. 3, when the first fluorescent protein-binding antibody attached to the substrate and the first fluorescent protein are bound, when the analyst performs surface observation of the substrate using a total reflection microscope, the analyzer determines the wavelength of the first fluorescent protein. From the change (ie, by measuring the individual monomolecular signals generated from the first fluorescent protein), it is possible to determine whether the first fluorescent protein is bound to the plurality of first fluorescent protein binding antibodies attached to the substrate.
한편, 본 발명을 실시함에 있어서는, 기판에 부착된 항체와의 결합을 위해 제1 단백질에 발현된 소정의 단백질은 반드시 형광 단백질일 필요는 없을 것이나, 형광 단백질이 아닌 경우에는 항체와의 결합여부를 전반사 현미경을 통해 파악할 수 없는 관계로 제1 단백질에 발현된 단백질은 형광 단백질이 되도록 함이 바람직할 것이다. On the other hand, in the practice of the present invention, the predetermined protein expressed in the first protein for binding with the antibody attached to the substrate does not necessarily need to be a fluorescent protein. Since it is not possible to grasp through the total reflection microscope, the protein expressed in the first protein may be a fluorescent protein.
즉, 본 발명에서의 제1 단백질에 발현된 소정의 단백질은 기판에 부착된 항체와의 결합을 하는 항원의 기능을 수행하는 것으로서, 이와 같이 제1 단백질에 부착된 소정의 항원은 반드시 단백질일 필요는 없으며, 항체와의 결합이 가능한 화합물이 될 수도 있을 것이다.That is, the predetermined protein expressed in the first protein in the present invention performs the function of an antigen that binds to the antibody attached to the substrate. Thus, the predetermined antigen attached to the first protein must be a protein. It may be a compound capable of binding to the antibody.
즉, 제1 단백질에 발현된 단백질이 형광 단백질이 형광 단백질인 경우에는 항체와의 결합여부를 전반사 현미경을 통해 파악할 수 있으므로, 기판에 부착된 항체와 결합된 형광 단백질의 개수 및 그에 따른 결합 밀도를 정확하게 측정할 수 있게 되는 것이다.That is, when the protein expressed in the first protein is a fluorescent protein, it is possible to determine whether the antibody is bound by the total reflection microscope, so that the number of fluorescent proteins bound to the antibody attached to the substrate and the binding density thereof are determined. It can be measured accurately.
기판상에 부착된 복수개의 제1 형광 단백질 결합항체에 각각 제1 형광 단백질이 결합된 것으로 확인되면, 분석자는 기판에 버퍼 용액을 공급함으로써, 제1 형광 단백질이 발현된 제1 단백질을 제외한 세포질 원액에 포함되어 있는 나머지 물질들을 기판상에서 제거하게 된다(S150).When it is confirmed that the first fluorescent protein is bound to each of the plurality of first fluorescent protein binding antibodies attached to the substrate, the analyst supplies a buffer solution to the substrate, thereby preparing the cytoplasmic stock except for the first protein expressing the first fluorescent protein. The remaining substances contained in the are removed on the substrate (S150).
그 다음, 분석자는 전술한 S110 단계에서의 세포와 동일한 다른 세포에서 해당 세포에 존재하는 제2 단백질에 유전자 조작을 통해 표지자로서 제2 형광 단백질이 발현되도록 한다(S160). 한편, 본 발명을 실시함에 있어서는, 제2 형광 단백질을 물리 화학적인 방법에 의해서 제2 단백질에 부착 또는 연결시킬 수도 있을 것이다.Next, the analyst causes the second fluorescent protein to be expressed as a marker through genetic engineering to a second protein present in the cell in another cell identical to the cell in step S110 (S160). Meanwhile, in carrying out the present invention, the second fluorescent protein may be attached or linked to the second protein by a physicochemical method.
한편, 전술한 S160 단계는 원활한 분석의 진행을 위해 전술한 S110 단계와 함께 미리 실행할 수도 있을 것이며, 본 발명을 실시함에 있어서, 제2 형광 단백질은 제1 형광 단백질과 다른 파장역역을 갖는 것이 바람직하므로, 제1 형광 단백질이 m-Cherry 단백질인 경우에 제2 형광 단백질은 녹색형광 단백질인 eGFP(enhanced Green Fluorescent Protein)가 될 수 있을 것이다.On the other hand, the above-described step S160 may be performed in advance with the above-described step S110 for the smooth progress of the analysis, in the practice of the present invention, since the second fluorescent protein preferably has a different wavelength range than the first fluorescent protein In the case where the first fluorescent protein is an m-Cherry protein, the second fluorescent protein may be an eGFP (enhanced Green Fluorescent Protein).
그 다음, 분석자는 전술한 S160 단계에서의 내부의 제2 단백질에 제2 형광 단백질이 발현되어 있는 세포의 세포질 원액 전체를 기판에 공급한다(S170).Next, the analyst supplies the entire cytoplasmic stock solution of the cell in which the second fluorescent protein is expressed in the second protein inside in step S160 (S170).
한편, 전술한 S170 단계를 실시함에 있어서 세포질 원액뿐만 아니라, 세포 원액, 희석된 세포질 원액, 또는 희석된 세포 원액 등의 세포 용액이 사용될 수 있을 것이다.On the other hand, in performing the above-described step S170, not only the cellular stock solution, but also a cell solution such as a cell stock solution, diluted cellular stock solution, or diluted cell stock solution may be used.
기판의 표면에 부착되어 있는 복수개의 제1 형광 단백질 결합항체에는 각각 제1 형광 단백질을 통해 제1 단백질이 결합되어 있으며, 이와 같은 기판의 표면에 제2 단백질이 포함되어 있는 세포질 원액 전체가 공급되면, 기판 표면의 제1 단백질은 세포질 원액에 포함되어 있는 제2 단백질 및 세포 내의 다른 단백질들(Native proteins in whole cell lysate)이 공존하는 세포내 환경에서와 동일한 상태에서 제2 단백질과 상호 작용을 하게 된다. The first protein is bound to the plurality of first fluorescent protein binding antibodies attached to the surface of the substrate, and when the entire cytoplasmic stock solution containing the second protein is supplied to the surface of the substrate, The first protein on the substrate surface interacts with the second protein in the same state as in the intracellular environment where the second protein in the cytoplasm and other proteins in whole cell lysate coexist. do.
보다 구체적으로, 도 4에서와 같이 기판 표면상에 부착된 각각의 항체에 제1 형광 단백질을 통해 결합되어 있는 각각의 제1 단백질은 제2 단백질과 세포내 환경에서와 동일한 상태에서 단일 분자 수준에서 결합과 분리를 반복하는 상호 작용을 하게 된다.More specifically, each first protein coupled via a first fluorescent protein to each antibody attached on the substrate surface as shown in FIG. 4 is at the single molecule level in the same state as in the second protein and the intracellular environment. There is an interaction of repeating joining and separating.
도 4에서와 같이 제1 단백질과 제2 단백질 간의 단일 분자 수준에서의 결합이 있는 경우에 분석자가 473nm의 파장을 갖는 전반사 현미경 등의 근접장을 발생시키는 광학 장치를 통해 기판의 표면을 관찰하면, 제2 단백질에 발현되어 있는 제2 형광 단백질인 eGFP에 의해, 기판 표면에서의 파장이 473nm에서 520nm로 변화한 것을 확인할 수 있다.When there is a binding at the single molecule level between the first protein and the second protein as shown in FIG. 4, when the analyst observes the surface of the substrate through an optical device that generates a near field such as a total reflection microscope having a wavelength of 473 nm, By the eGFP which is a 2nd fluorescent protein expressed by 2 proteins, it can be confirmed that the wavelength on the surface of a board | substrate changed from 473 nm to 520 nm.
즉, 제1 단백질과 제2 단백질 간의 결합을 통해 기판 표면에 위치하게 된 제2 형광 단백질(eGFP)로부터 발생되는 특정 파장대역(520nm)의 형광 신호의 검출을 통해 제1 단백질과 제 2단백질의 결합상태를 확인할 수 있게 되고, 분석자는 기판 표면상에 부착된 각각의 항체에서의 파장의 변화를 지속적으로 관찰함으로써, 제1 단백질과 제2 단백질의 결합과 분리의 빈도 등의 상호작용을 단분자 수준에서 분석할 수 있게 된다(S180).That is, the first protein and the second protein are detected by detecting a fluorescence signal of a specific wavelength band (520 nm) generated from the second fluorescent protein (eGFP) located on the surface of the substrate through the binding between the first protein and the second protein. The binding state can be confirmed, and the analyst continuously observes the change in wavelength of each antibody attached on the surface of the substrate so that the interaction between the first protein and the second protein, such as the frequency of binding and separation of the first protein Can be analyzed at the level (S180).
아울러, 본 발명에서는 전술한 S170 단계에서 기판에 공급된 세포질 원액이 존재하는 상황에서, 특정 파장의 형광 신호를 실시간 측정함으로써 제1 단백질과 제2 단백질의 결합과 분리의 빈도 등의 상호작용을 세포 환경과 동일한 환경에서 분석할 수 있게 되는 것이다.In addition, in the present invention, in the presence of the cellular stock solution supplied to the substrate in step S170 described above, by measuring the fluorescence signal of a specific wavelength in real time, the interaction between the first protein and the second protein, such as the frequency of binding and separation of the cell It can be analyzed in the same environment as the environment.
한편, 제1 단백질과 결합되지 않은 제2 단백질도 기판에 공급된 세포질 원액 내에서 부유이동하는 과정에서, 기판 표면 근처로 이동할 수 있으며, 이러한 경우에도 전반사 현미경을 통한 표면 관찰시 제2 단백질에 발현되어 있는 제2 형광 단백질인 eGFP에 의해, 기판 표면에서의 파장이 473nm에서 520nm로 변화하게 됨으로써, 상호작용 분석의 오류를 초래할 수 있다는 문제점이 제기될 수 있을 것이다.On the other hand, the second protein that is not bound to the first protein can also move near the surface of the substrate during the floating movement in the cellular stock solution supplied to the substrate, and even in this case, it is expressed in the second protein when the surface is observed through a total reflection microscope With the second fluorescent protein, eGFP, the wavelength at the substrate surface is changed from 473 nm to 520 nm, which may lead to the problem of an error in interaction analysis.
따라서, 본 발명을 실시함에 있어서는, 전반사 현미경을 통해 기판 표면에서의 파장 변화를 측정하는 경우에 파장 변화를 소정의 시간 동안 적분 측정하는 것이 바람직할 것이다.Therefore, in the practice of the present invention, when measuring the change in the wavelength on the surface of the substrate through a total reflection microscope, it is preferable to measure the change in the wavelength for a predetermined time.
제1 단백질과 결합되지 않고 세포질 원액 내를 부유하는 제2 단백질은 세포질 원액내에서의 이동속도가 대단히 빠르므로, 제2 단백질이 부유 이동 중에 일시적으로 기판 표면에 접근하였더라도 적분 측정의 시간 구간 내에서 다시 기판 표면으로부터 이탈하게 되기 때문이다.The second protein, which is not bound to the first protein and floats in the cytoplasmic stock solution, has a very high rate of movement in the cytoplasmic stock solution, so that even if the second protein temporarily approaches the surface of the substrate during the suspension movement, within the time interval of the integration measurement. This is because the substrate deviates from the substrate surface again.
이를 검증하기 위해, 제2 단백질을 제1 단백질과 결합되지 않도록 처리함으로써, 제1 단백질과 결합되는 제2 단백질이 없이 모든 제2 단백질이 세포질 원액내를 부유 이동하게 되는 상태에서 기판 표면에서의 파장 변화를 50msec의 적분 구간으로 적분 측정한 결과, 파장 변화가 전혀 관측되지 않음을 실험적으로 확인하였다.To verify this, the second protein is treated so as not to bind with the first protein, so that all the second proteins are suspended in the cytosolic solution without the second protein bound to the first protein. As a result of integrating the change into an integration section of 50 msec, it was confirmed experimentally that no wavelength change was observed.
한편, 본 발명을 실시함에 있어서는, 전술한 S180 단계에서의 단백질-단백질 상호 작용 분석값을 제1 분석값으로 확보하고, 후술하는 다른 환경에서의 단백질-단백질 상호 작용 분석값을 제2 분석값으로 확보하여 양자의 비교 분석을 수행할 수도 있을 것이다.Meanwhile, in carrying out the present invention, the protein-protein interaction analysis value in the above-described step S180 is secured as the first analysis value, and the protein-protein interaction analysis value in another environment described later as the second analysis value. It may be possible to perform a comparative analysis of the two.
즉, 시험자는 전술한 S180 단계에서의 상호 작용 분석값을 제1 분석값으로 확보한 후에, 전술한 S110 단계 내지 S160 단계까지를 동일하게 반복하여 실시한다.That is, the tester secures the above-described interaction analysis value in the above-described step S180 as the first analysis value, and then repeats the above-described steps S110 to S160 in the same manner.
한편, 시험자는 전술한 S170 단계를 실행함에 있어서, 전술한 S160 단계에서 내부의 제2 단백질에 제2 형광 단백질이 발현되어 있는 세포의 세포질 원액을 기판에 공급하는 것이 아니라, 해당 세포의 세포질 원액과 암세포 등의 별도의 분석 대상 세포질 원액을 혼합한 혼합 세포질 원액을 기판에 공급하게 된다(S190).On the other hand, in performing the above-described step S170, the tester does not supply the cytoplasmic stock solution of the cell in which the second fluorescent protein is expressed in the second protein therein to the substrate, but instead of the cytoplasmic stock solution of the cell. The mixed cytoplasmic stock solution obtained by mixing the cytoplasmic stock solution of another analysis target such as cancer cells is supplied to the substrate (S190).
한편, 전술한 S190 단계를 실시함에 있어서 혼합 세포질 원액뿐만 아니라, 혼합 세포 원액, 희석된 혼합 세포질 원액, 또는 희석된 혼합 세포 원액 등의 혼합 세포 용액이 사용될 수 있을 것이다.On the other hand, in performing the above-described step S190 as well as mixed cellular stock solution, mixed cell solutions such as mixed cell stock, diluted mixed cytoplasm stock, or diluted mixed cell stock may be used.
즉, 기판의 표면에 부착되어 있는 복수개의 제1 형광 단백질 결합항체에는 각각 제1 형광 단백질을 통해 제1 단백질이 결합되어 있으며, 제2 단백질이 포함되어 있는 세포질 원액과 분석 대상 세포질 원액을 혼합한 혼합 세포질 원액이 기판의 표면에 공급되면, 기판 표면의 제1 단백질은 혼합 세포질 원액에 포함되어 있는 제2 형광 단백질이 발현되어 있는 제2 단백질 뿐만 아니라, 분석 대상 세포 내의 제2 형광 단백질이 발현되어 있지 않은 제2 단백질 및 기타의 다른 단백질들(Native proteins in whole cell lysate)이 공존하는 환경에서 제2 단백질과 상호 작용을 하게 된다.That is, the first protein is bound to the plurality of first fluorescent protein binding antibodies attached to the surface of the substrate, respectively, and the cytoplasmic solution containing the second protein is mixed with the cytoplasmic stock solution to be analyzed. When the mixed cytoplasmic stock solution is supplied to the surface of the substrate, the first protein on the substrate surface expresses not only the second protein expressing the second fluorescent protein contained in the mixed cytoplasm stock solution, but also the second fluorescent protein in the cell to be analyzed. The second protein, which is not present, and other proteins (Native proteins in whole cell lysate) will interact with the second protein in a coexisting environment.
즉, 전술한 S180 단계에서와는 달리, 제2 형광 단백질이 발현되어 있는 제2 단백질은 분석 대상 세포 내의 제2 형광 단백질이 발현되어 있지 않은 제2 단백질과 공존하는 상태에서 기판 표면의 제1 단백질과 경쟁적으로 상호 작용을 하게 된다. 뿐만 아니라, 분석 대상 세포 내의 다른 단백질에 의해 제2 형광 단백질이 발현되어 있는 제2 단백질은 제1 단백질과의 상호 작용에 있어 영향을 받게 된다.That is, unlike step S180 described above, the second protein in which the second fluorescent protein is expressed is competitive with the first protein on the substrate surface in the state of coexisting with the second protein in which the second fluorescent protein is not expressed in the cell to be analyzed. To interact. In addition, the second protein in which the second fluorescent protein is expressed by another protein in the cell to be analyzed is affected by the interaction with the first protein.
이와 같은 분석 대상 세포 내의 다른 단백질 또는 분석 대상 세포 내의 제2 단백질에 의한 영향의 정도는, 시험자가 전술한 S180 단계에서와 같이 전반사 현미경 등의 근접장을 발생시키는 광학 장치를 통해 기판의 표면을 관찰하여, 기판 표면의 제1 단백질과 제2 형광 단백질이 발현되어 있는 제2 단백질의 결합과 분리의 빈도 등의 상호작용을 단분자 수준에서 분석함으로써 확인할 수 있게 된다(S195).The degree of influence by the other protein in the cell to be analyzed or the second protein in the cell to be analyzed may be determined by observing the surface of the substrate through an optical device that generates a near field such as a total reflection microscope as in the step S180 described above. In addition, the interactions such as the frequency of binding and separation of the first protein and the second protein on which the second fluorescent protein is expressed on the substrate surface can be confirmed by analyzing at a single molecule level (S195).
보다 구체적으로, 시험자는 상술한 제1 분석값과 전술한 S195 단계에서의 분석값인 제2 분석값을 비교분석함으로써 제2 단백질의 제1 단백질과의 상호 작용에 있어서의 다른 세포 내의 제2 단백질 및 다른 세포 내의 기타의 단백질에 의한 상호 작용의 촉진 또는 방해 등의 영향 정도를 분석할 수 있게 될 것이다.More specifically, the investigator compares the first analysis value described above with the second analysis value which is the analysis value at step S195 described above, and thereby the second protein in another cell in the interaction of the second protein with the first protein. And the extent of effects such as the promotion or interference of interaction by other proteins in other cells.
한편, 도 5는 본 발명의 다른 실시예에 따른 단백질-단백질 상호작용 분석 방법을 설명하는 절차 흐름도이다. 도 5에서의 본 발명의 다른 실시예에 있어서는 도 1에서의 본 발명의 일 실시예에서와는 달리, 제1 단백질에 제1 형광 단백질을 발현시키지 않고, 기판에 제1 형광 단백질 결합항체가 아니라, 제1 단백질 결합항체를 부착함으로써 제1 단백질이 기판에 부착된 항체에 직접 결합된 상태에서의 제1 단백질과 제2 단백질과의 상호작용을 분석하게 된다.5 is a flowchart illustrating a method for analyzing protein-protein interaction according to another embodiment of the present invention. In another embodiment of the present invention in FIG. 5, unlike in the embodiment of the present invention in FIG. 1, the first protein is not expressed in the first protein and is not a first fluorescent protein-binding antibody on the substrate. By attaching the first protein-binding antibody, the interaction between the first protein and the second protein in the state in which the first protein is directly bound to the antibody attached to the substrate is analyzed.
도 5를 참조하여, 본 발명의 다른 실시예에 따른 단백질-단백질 상호작용 분석 방법을 설명하면, 먼저, 분석자는 특정한 두 개의 단백질인 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준에서 분석하기 위해서, 폴리에틸렌 글리콜(polyethyleneglycol:PEG) 코팅처리된 퀄츠 슬라이드(Quartz Slide)인 기판에, 제1 단백질과 결합되는 항체인 제1 단백질 결합항체를 같이 부착한다(S210). Referring to Figure 5, when explaining a protein-protein interaction analysis method according to another embodiment of the present invention, first, the analyst analyzes the interaction of two specific proteins, the first protein and the second protein at a single molecule level To this end, a first protein binding antibody, which is an antibody bound to a first protein, is attached together to a substrate that is a polyethylene slide (Quartz Slide) coated with polyethylene glycol (PEG) (S210).
한편, 본 발명을 실시함에 있어서는, 제1 단백질과 결합하는 항체에는, 항체 이외에도 DNA, RNA, 단백질과 결합하는 특정 성분을 갖는 리포좀(liposome) 등의 제1 단백질과 결합하는 생체 분자체가 사용될 수 있을 것이다.On the other hand, in the practice of the present invention, in addition to the antibody, a biomolecular sieve that binds to a first protein such as a liposome having DNA, RNA, a specific component that binds to the protein, or the like may be used as the antibody to bind to the first protein. There will be.
그 다음, 분석자는 제1 단백질이 포함되어 있는 세포의 세포질 원액을 기판에 공급함으로써(S220), 제1 단백질과 제1 단백질 결합항체의 결합을 유도한다(S230).Next, the analyst induces the binding of the first protein and the first protein-binding antibody (S230) by supplying the substrate of the cytoplasm of the cell containing the first protein to the substrate (S220).
한편, 전술한 S220 단계를 실시함에 있어서 세포질 원액뿐만 아니라, 세포 원액, 희석된 세포질 원액, 또는 희석된 세포 원액 등의 세포 용액이 사용될 수 있을 것이다.On the other hand, in performing the above-described step S220, not only the cellular stock solution, but also a cell solution such as a cell stock solution, diluted cytoplasm stock, or diluted cell stock may be used.
한편, 본 발명의 다른 실시예에서도 분석자는 제1 단백질에 m-Cherry 등의 소정의 형광 단백질이 발현되도록 사전 처리할 수 있을 것이며, 이 경우에 제1 단백질 결합항체와 제1 단백질이 결합된 경우에 분석자가 전반사 현미경을 이용한 기판의 표면 관찰을 수행하면, 분석자는 제1 단백질에 발현되어 있는 제1 형광 단백질에 의한 파장 변화로부터 기판상에 부착된 복수개의 제1 단백질 결합항체에 제1 단백질이 결합되었는지 여부를 확인할 수 있을 것이다.On the other hand, in another embodiment of the present invention, the analyst may be pre-processed to express a predetermined fluorescent protein such as m-Cherry in the first protein, in this case the first protein binding antibody and the first protein is bound When the analyst observes the surface of the substrate by using a total reflection microscope, the analyst analyzes the surface of the substrate using a total reflection microscope, and the analyzer analyzes the surface of the substrate and changes the wavelength of the first fluorescent protein expressed in the first protein. You can check whether it is combined.
기판상에 부착된 복수개의 제1 단백질 결합항체에 각각 제1 단백질이 결합된 것으로 확인되면, 분석자는 기판에 버퍼 용액을 공급함으로써, 제1 단백질을 제외한 세포질 원액에 포함되어 있는 나머지 물질들을 기판상에서 제거하게 된다(S240).When it is confirmed that the first protein is bound to each of the plurality of first protein binding antibodies attached to the substrate, the analyst supplies a buffer solution to the substrate, thereby restoring the remaining substances contained in the cellular stock except for the first protein on the substrate. It will be removed (S240).
그 다음, 분석자는 전술한 세포와 동일한 다른 세포에서 해당 세포에 존재하는 제2 단백질에 유전자 조작을 통해 형광 단백질이 발현되도록 조작한다(S250).Next, the analyst manipulates the fluorescent protein to be expressed through genetic engineering to the second protein present in the cell in another cell identical to the cell described above (S250).
한편, 전술한 S250 단계는 원활한 분석의 진행을 위해 전술한 S210 단계 이전에 미리 실행할 수도 있을 것이며, 본 발명을 실시함에 있어서, 제2 단백질에 발현되는 형광 단백질 또한 eGFP로 함이 바람직할 것이다.On the other hand, the above-described step S250 may be performed before the above-mentioned step S210 to facilitate the progress of the analysis, in the practice of the present invention, it will be preferable that the fluorescent protein expressed in the second protein also eGFP.
그 다음, 분석자는 전술한 S250 단계에서의, 내부의 제2 단백질에 형광 단백질이 발현되어 있는 세포의 세포질 원액 전체를 기판에 공급한다(S260).Next, the analyst supplies the entire cytoplasmic stock solution of the cell in which the fluorescent protein is expressed in the internal second protein in step S250 (S260).
한편, 전술한 S260 단계를 실시함에 있어서 세포질 원액뿐만 아니라, 세포 원액, 희석된 세포질 원액, 또는 희석된 세포 원액 등의 세포 용액이 사용될 수 있을 것이다.Meanwhile, in carrying out the above-described step S260, not only the cellular stock solution, but also a cell solution such as a cell stock solution, a diluted cellular stock solution, or a diluted cell stock solution may be used.
기판의 표면에 부착되어 있는 복수개의 제1 단백질 결합항체에는 각각 제1 단백질이 결합되어 있으며, 이와 같은 기판의 표면에 제2 단백질이 포함되어 있는 세포질 원액 전체가 공급되면, 기판 표면의 제1 단백질은 세포질 원액에 포함되어 있는 제2 단백질과 세포내 환경에서와 동일한 상태에서 상호 작용을 하게 된다. The first protein is bound to the plurality of first protein-binding antibodies attached to the surface of the substrate, and when the whole cellular stock solution containing the second protein is supplied to the surface of the substrate, the first protein on the surface of the substrate is Interacts with the second protein contained in the cellular stock solution in the same state as in the intracellular environment.
즉, 기판 표면상에 부착된 각각의 항체에 결합되어 있는 각각의 제1 단백질은 제2 단백질과 세포내 환경에서와 동일한 상태에서 단일 분자 수준에서 결합과 분리를 반복하는 상호 작용을 하게 된다.In other words, each first protein bound to each antibody attached on the substrate surface interacts with the second protein repeatedly binding and separation at the single molecule level in the same state as in the intracellular environment.
제1 단백질과 제2 단백질 간의 단일 분자 수준에서의 결합이 있는 경우에 분석자가 473nm의 파장을 갖는 전반사 현미경을 통해 기판의 표면을 관찰하면, 제2 단백질에 발현되어 있는 형광 단백질인 eGFP에 의해, 기판 표면에서의 파장이 473nm에서 520nm로 변화하게 되며, 이와 같은 파장의 변화를 통해 제1 단백질과 제 2단백질의 결합상태를 확인할 수 있게 되고, 분석자는 기판 표면상에 부착된 각각의 항체에서의 파장의 변화를 지속적으로 관찰함으로써, 제1 단백질과 제2 단백질의 결합과 분리의 빈도 등의 상호작용을 단분자 수준에서 분석할 수 있게 된다(S270).When there is a binding at the single molecule level between the first protein and the second protein, when the analyst observes the surface of the substrate through a total reflection microscope having a wavelength of 473 nm, eGFP is a fluorescent protein expressed in the second protein. The wavelength at the substrate surface is changed from 473 nm to 520 nm, and the change in the wavelength enables confirmation of the binding state between the first protein and the second protein. By continuously observing the change in wavelength, it is possible to analyze the interaction, such as the frequency of binding and separation of the first protein and the second protein at a single molecule level (S270).
아울러, 도 5에서의 본 발명의 다른 실시예에 따른 단백질-단백질 상호작용 분석 방법을 실시함에 있어서도, 전술한 S270 단계에서의 단백질-단백질 상호 작용 분석값을 제1 분석값으로 확보하고, 후술하는 다른 환경에서의 단백질-단백질 상호 작용 분석값을 제2 분석값으로 확보하여 양자의 비교 분석을 수행할 수도 있을 것이다.In addition, also in the protein-protein interaction analysis method according to another embodiment of the present invention in Figure 5, the protein-protein interaction analysis value in the above step S270 is ensured as the first analysis value, which will be described later Comparative analysis of the two may be performed by obtaining the protein-protein interaction analysis value in the other environment as the second analysis value.
즉, 시험자는 전술한 S270 단계에서의 상호 작용 분석값을 제1 분석값으로 확보한 후에, 전술한 S210 단계 내지 S250 단계까지를 동일하게 반복하여 실시한다.That is, the tester secures the above-described interaction analysis value in the above-described step S270 as the first analysis value, and then repeats the above-described steps S210 to S250 in the same manner.
한편, 시험자는 전술한 S260 단계를 실햄함에 있어서, 전술한 S250 단계에서 내부의 제2 단백질에 제2 형광 단백질이 발현되어 있는 세포의 세포질 원액을 기판에 공급하는 것이 아니라, 해당 세포의 세포질 원액과 암세포 등의 별도의 분석 대상 세포질 원액을 혼합한 혼합 세포질 원액을 기판에 공급하게 된다(S280).On the other hand, in the step S260 described above, the tester does not supply the cytoplasmic stock of the cell in which the second fluorescent protein is expressed in the second protein therein to the substrate, but not with the cytoplasmic stock of the cell. The mixed cytoplasmic stock solution, which is a mixture of separate cytoplasmic stock solutions, such as cancer cells, is supplied to the substrate (S280).
한편, 전술한 S280 단계를 실시함에 있어서 혼합 세포질 원액뿐만 아니라, 혼합 세포 원액, 희석된 혼합 세포질 원액, 또는 희석된 혼합 세포 원액 등의 혼합 세포 용액이 사용될 수 있을 것이다.On the other hand, in performing the above-described step S280, mixed cell solutions such as mixed cell stock, diluted mixed cytoplasm, or diluted mixed cell stock may be used.
즉, 기판의 표면에 부착되어 있는 복수개의 제1 단백질 결합항체에는 각각 제1 단백질이 결합되어 있으며, 제2 단백질이 포함되어 있는 세포질 원액과 분석 대상 세포질 원액을 혼합한 혼합 세포질 원액이 기판의 표면에 공급되면, 기판 표면의 제1 단백질은 혼합 세포질 원액에 포함되어 있는 제2 형광 단백질이 발현되어 있는 제2 단백질뿐만 아니라, 분석 대상 세포 내의 제2 형광 단백질이 발현되어 있지 않은 제2 단백질 및 기타의 다른 단백질들(Native proteins in whole cell lysate)이 공존하는 환경에서 제2 단백질과 상호 작용을 하게 된다.That is, the first protein is bound to the plurality of first protein-binding antibodies attached to the surface of the substrate, and the mixed cytoplasmic solution containing the cytoplasmic solution containing the second protein and the cytoplasmic solution to be analyzed is the surface of the substrate. When supplied to the first protein, the first protein on the substrate surface is not only a second protein expressing the second fluorescent protein contained in the mixed cytoplasm stock solution, but also a second protein not expressing the second fluorescent protein in the cell to be analyzed and the like. Other proteins in the cell (Native proteins in whole cell lysate) will interact with the second protein in the environment.
즉, 전술한 S270 단계에서와는 달리, 제2 형광 단백질이 발현되어 있는 제2 단백질은 분석 대상 세포 내의 제2 형광 단백질이 발현되어 있지 않은 제2 단백질과 공존하는 상태에서 기판 표면의 제1 단백질과 경쟁적으로 상호 작용을 하게 된다. 뿐만 아니라, 분석 대상 세포 내의 다른 단백질에 의해 제2 형광 단백질이 발현되어 있는 제2 단백질은 제1 단백질과의 상호 작용에 있어 영향을 받게 된다.That is, unlike step S270 described above, the second protein in which the second fluorescent protein is expressed is competitive with the first protein on the substrate surface in the state of coexisting with the second protein in which the second fluorescent protein is not expressed in the cell to be analyzed. To interact. In addition, the second protein in which the second fluorescent protein is expressed by another protein in the cell to be analyzed is affected by the interaction with the first protein.
이와 같은 분석 대상 세포 내의 다른 단백질 또는 분석 대상 세포 내의 제2 단백질에 의한 영향의 정도는, 시험자가 전술한 S270 단계에서와 같이 전반사 현미경 등의 근접장을 발생시키는 광학 장치를 통해 기판의 표면을 관찰하여, 기판 표면의 제1 단백질과 제2 형광 단백질이 발현되어 있는 제2 단백질의 결합과 분리의 빈도 등의 상호작용을 단분자 수준에서 분석함으로써 확인할 수 있게 된다(S290).The degree of influence by the other protein in the cell to be analyzed or the second protein in the cell to be analyzed may be determined by observing the surface of the substrate through an optical device that generates a near field such as a total reflection microscope as in the step S270 described above. In addition, the interactions such as the frequency of binding and separation of the first protein on the substrate surface and the second protein on which the second fluorescent protein is expressed can be confirmed by analyzing at a single molecule level (S290).
보다 구체적으로, 시험자는 상술한 제1 분석값과 전술한 S290 단계에서의 분석값인 제2 분석값을 비교분석함으로써 제2 단백질의 제1 단백질과의 상호 작용에 있어서의 다른 세포 내의 제2 단백질 및 다른 세포 내의 기타의 단백질에 의한 상호 작용의 촉진 또는 방해 등의 영향 정도를 분석할 수 있게 될 것이다.More specifically, the investigator compares the first analysis value described above with the second analysis value which is the analysis value at step S290 described above, and thereby the second protein in another cell in interaction with the first protein of the second protein. And the extent of effects such as the promotion or interference of interaction by other proteins in other cells.
한편, 전술한 도 1 내지 도 5에서의 본 발명에 따른 단백질-단백질 상호작용 분석 방법은 도 6에서의 구조를 갖는 분석 장치에서 실행된다.Meanwhile, the method for analyzing protein-protein interaction according to the present invention in FIGS. 1 to 5 described above is performed in an analysis apparatus having the structure in FIG. 6.
도 6을 참조하면, 본 발명에 따른 단백질-단백질 상호작용 분석 장치(300)는 광학 여기부(320), 시료 로딩부(310), 광학 측정부(330), 신호 분석부(340), 신호 진단부(360), 및 저장부(350)를 포함한다.Referring to FIG. 6, the protein-protein interaction analysis device 300 according to the present invention includes an optical excitation unit 320, a sample loading unit 310, an optical measuring unit 330, a signal analyzing unit 340, and a signal. The diagnosis unit 360 and the storage unit 350 are included.
먼저, 시료 로딩부(310)에서는 전술한 본 발명에서의 단백질-단백질 상호작용 분석 방법에 사용되는 기판이 로딩된다. 광학 여기부(320)는 시료 로딩부에 로딩된 기판의 표면에 제1 파장을 갖는 근접장을 발생시킨다.First, the sample loading unit 310 is loaded with the substrate used in the protein-protein interaction analysis method described above in the present invention. The optical excitation portion 320 generates a near field having a first wavelength on the surface of the substrate loaded in the sample loading portion.
광학 측정부(330)는 세포질 원액 또는 혼합 세포질 원액이 기판에 공급된 상태에, 기판 표면에 부착된 제1 단백질과 형광 단백질이 구비된 제2 단백질의 상호 작용에 따른 기판 표면에서의 상기 제1 파장의 제2 파장으로의 파장 변화를 감지한다. The optical measuring unit 330 is the first protein on the substrate surface in accordance with the interaction of the first protein attached to the substrate surface and the second protein provided with a fluorescent protein in a state in which the cellular stock solution or mixed cytoplasm stock solution is supplied to the substrate Sensing a change in wavelength from the wavelength to the second wavelength.
본 발명을 실시함에 있어서, 제2 단백질에 구비된 형광 단백질이 eGFP인 경우에, 제1 파장은 473nm이고, 제2 파장은 520nm가 될 것이다.In practicing the present invention, when the fluorescent protein included in the second protein is eGFP, the first wavelength will be 473 nm and the second wavelength will be 520 nm.
아울러, 광학 측정부(330)는 제2 파장의 형광 신호를 소정의 시간 동안 적분 측정할 뿐만 아니라 기판에 세포질 원액 또는 혼합 세포질 원액이 존재하는 상황에서 제2 파장의 형광 신호를 실시간으로 측정하며, 그 측정에 있어서 단분자 민감도를 갖는 것이 바람직할 것이다.In addition, the optical measuring unit 330 not only measures the fluorescence signal of the second wavelength for a predetermined time, but also measures the fluorescence signal of the second wavelength in real time in the presence of the cellular stock solution or the mixed cytoplasm stock solution, It would be desirable to have monomolecular sensitivity in the measurement.
한편, 신호 분석부(340)는 광학 측정부(330)가 측정한 제2 파장의 형광 신호를 이미지 프로세싱을 통해 분석하여 분석값을 산출하고, 산출된 분석값을 저장부(350)에 저장한다.Meanwhile, the signal analyzer 340 analyzes the fluorescence signal of the second wavelength measured by the optical measuring unit 330 through image processing to calculate an analysis value, and stores the calculated analysis value in the storage unit 350. .
또한, 신호 분석부(340)는 세포질 원액 또는 혼합 세포질 원액 등의 다양한 세포질 원액이 기판에 공급된 각각의 상황에서 광학 측정부(330)가 각각 측정한 제2 파장의 형광 신호에 기초하여 개별적으로 산출한 분석값을 저장부(350)에 저장한다.In addition, the signal analyzer 340 is individually based on the fluorescence signal of the second wavelength measured by the optical measuring unit 330 in each situation in which various cytoplasmic solutions such as cytoplasmic stock solution or mixed cytoplasmic stock solution are supplied to the substrate. The calculated analysis value is stored in the storage 350.
구체적으로, 신호 분석부(340)는 광학 측정부(330)가 도 7에서와 같은 형광 신호를 측정한 경우에 신호 분석부(340)는 측정된 형광 신호 중에서 도 7에서의 붉은 선으로 표시된 신호 저점(baseline)을 찾아낸다. Specifically, when the optical analyzer 330 measures the fluorescence signal as shown in FIG. 7, the signal analyzer 340 may display the signal indicated by the red line in FIG. 7 among the measured fluorescence signals. Find the baseline.
신호 저점은 대략 10초 내지 20초 사이에 상승하게 되는데 이는 제2 단백질을 포함하고 있는 세포질 원액 또는 혼합 세포질 원액이 광학 측정부(330)의 이미징 영역에 도착하게 된 것을 의미한다.The signal low rises between approximately 10 to 20 seconds, which means that the cellular stock solution or the mixed cytoplasmic stock containing the second protein arrives at the imaging area of the optical measuring unit 330.
한편, 신호 분석부(340)는 상승된 신호 저점(baseline)을 중심으로 발생하는 변동(fluctuation, 즉, 노이즈(Noise))를 측정한 후, 이를 기준으로 의미있는 단백질-단백질 상호 작용을 정의하는 기준점(Threshold)을 설정한다.Meanwhile, the signal analyzer 340 measures fluctuation, ie, noise, which occurs around an elevated signal baseline, and then defines meaningful protein-protein interactions based on the fluctuation. Set the threshold.
신호 저점을 중심으로 발생하는 노이즈는 단백질 간의 상호 작용없이 단순히 빠르게 계속 이동하고 있는 제2 단백질들의 거동에 의해 형성되는 것이며, 신호 분석부(340)는 이와 같이 상호 작용과 무관한 노이즈에 의해 초과할 수 없는 값으로 기준점을 설정한다.The noise generated around the signal low is formed by the behavior of the second proteins that are continuously moving quickly without interaction between the proteins, and the signal analyzer 340 may be exceeded by the noise that is not related to the interaction. Set the reference point to an unknown value.
기준점을 초과하는 신호가 있는 경우에는 신호 분석부(340)는 해당 시점에 제1 단백질과 제2 단백질의 의미있는 상호 작용이 있는 것으로 판단하고, 상호 작용이 지속되는 시간(τoff)과, 제1 단백질과 제2 단백질의 다음 결합까지의 시간(τon)을 측정하고, 이를 분석값으로서 저장부(350)에 저장한다.When there is a signal exceeding the reference point, the signal analyzer 340 determines that there is a meaningful interaction between the first protein and the second protein at the corresponding time point, and the duration of the interaction (τ off ), and The time until the next binding between the first protein and the second protein τ on is measured and stored in the storage 350 as an analysis value.
신호 분석부(340)가 획득한, 상호 작용이 지속되는 시간(τoff), 및 제1 단백질과 제2 단백질의 다음 결합까지의 시간(τon)의 분석을 통해 단백질-단백질 상호 작용에 대한 일련의 정보를 얻을 수 있게 되며, 신호 진단부(360)는 다양한 세포질 원액이 기판에 공급된 각각의 상황에서 산출된 분석값들을 상호 비교 분석하며, 비교 분석 결과에 따라 각각의 세포질 상태에 대한 생물학적, 의학적 진단을 소정의 진단 알고리즘에 따라 도출하는 기능을 수행한다.The analysis of the protein-protein interaction through the analysis of the time (τ off ) and the time until the next binding of the first protein and the second protein (τ on ) obtained by the signal analyzer 340 is performed. A series of information can be obtained, and the signal diagnosis unit 360 compares and analyzes the analytical values calculated in each situation in which various cytoplasmic solutions are supplied to the substrate. In this case, the medical diagnosis is performed according to a predetermined diagnosis algorithm.
이상에서는 본 발명의 바람직한 실시예 및 응용예에 대하여 도시하고 설명하였지만, 본 발명은 상술한 특정의 실시예 및 응용예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진자에 의해 다양한 변형실시가 가능한 것은 물론이고, 이러한 변형실시들은 본 발명의 기술적 사상이나 전망으로부터 개별적으로 이해되어져서는 안될 것이다.While the above has been shown and described with respect to preferred embodiments and applications of the present invention, the present invention is not limited to the specific embodiments and applications described above, the invention without departing from the gist of the invention claimed in the claims Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.
본 발명은 의료 산업 분야에서의 산업상 이용가능성이 인정된다.Industrial Applicability The present invention is recognized in the medical industry.

Claims (3)

  1. 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준까지 분석하기 위한 장치에 있어서,A device for analyzing the interaction of a first protein with a second protein up to a single molecule level,
    상기 제1 단백질이 결합되는 생체 분자체인 제1 단백질 결합 분자체가 부착된 기판이 로딩되는 시료 로딩부 -상기 기판에 상기 제1 단백질을 공급하여 상기 제1 단백질과 상기 제1 단백질 결합 분자체의 결합을 유도하고, 상기 제1 단백질과 상기 제1 단백질 결합 분자체가 결합된 경우에, 표지자가 구비된 제2 단백질이 포함된 세포의 세포 용액이 상기 기판에 공급됨-; A sample loading unit in which a substrate on which a first protein binding molecular sieve is attached, which is a biomolecular sieve to which the first protein is bound, is loaded. A sample loading unit is provided to supply the first protein to the substrate. Inducing binding and, when the first protein and the first protein binding molecular sieve are bound, a cell solution of cells containing a second protein with a marker is supplied to the substrate;
    상기 시료 로딩부에 로딩된 상기 기판의 표면에 제1 파장을 갖는 근접장을 발생시키는 광학 여기부; 및An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion; And
    상기 세포 용액이 상기 기판에 공급된 상태에서, 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하는 광학 측정부An optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate
    를 포함하며,Including;
    상기 광학 측정부는, 상기 제2 파장의 형광 신호를 소정의 시간 동안 적분 측정하는 것인 단백질-단백질 상호작용 분석 장치.The optical measuring unit, the protein-protein interaction analysis device for measuring the integration of the fluorescent signal of the second wavelength for a predetermined time.
  2. 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준까지 분석하기 위한 장치에 있어서,A device for analyzing the interaction of a first protein with a second protein up to a single molecule level,
    상기 제1 단백질이 결합되는 생체 분자체인 제1 단백질 결합 분자체가 부착된 기판이 로딩되는 시료 로딩부 -상기 기판에 상기 제1 단백질을 공급하여 상기 제1 단백질과 상기 제1 단백질 결합 분자체의 결합을 유도하고, 상기 제1 단백질과 상기 제1 단백질 결합 분자체가 결합된 경우에, 표지자가 구비된 제2 단백질이 포함된 세포의 세포 용액이 상기 기판에 공급됨-; A sample loading unit in which a substrate on which a first protein binding molecular sieve is attached, which is a biomolecular sieve to which the first protein is bound, is loaded. A sample loading unit is provided to supply the first protein to the substrate. Inducing binding and, when the first protein and the first protein binding molecular sieve are bound, a cell solution of cells containing a second protein with a marker is supplied to the substrate;
    상기 시료 로딩부에 로딩된 상기 기판의 표면에 제1 파장을 갖는 근접장을 발생시키는 광학 여기부; 및An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion; And
    상기 세포 용액이 상기 기판에 공급된 상태에서, 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하는 광학 측정부An optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate
    를 포함하며,Including;
    상기 광학 측정부는, 상기 기판에 상기 공급된 세포 용액이 존재하는 상황에서, 상기 제2 파장의 형광 신호를 실시간 측정하는 것인 단백질-단백질 상호작용 분석 장치.The optical measuring unit is a protein-protein interaction analysis device for measuring the fluorescence signal of the second wavelength in real time in the presence of the supplied cell solution on the substrate.
  3. 제1 단백질과 제2 단백질의 상호작용을 단일 분자 수준까지 분석하기 위한 장치에 있어서,A device for analyzing the interaction of a first protein with a second protein up to a single molecule level,
    상기 제1 단백질이 결합되는 생체 분자체인 제1 단백질 결합 분자체가 부착된 기판이 로딩되는 시료 로딩부 -상기 기판에 상기 제1 단백질을 공급하여 상기 제1 단백질과 상기 제1 단백질 결합 분자체의 결합을 유도하고, 상기 제1 단백질과 상기 제1 단백질 결합 분자체가 결합된 경우에, 표지자가 구비된 제2 단백질이 포함된 세포의 세포 용액이 상기 기판에 공급됨-; A sample loading unit in which a substrate on which a first protein binding molecular sieve is attached, which is a biomolecular sieve to which the first protein is bound, is loaded. A sample loading unit is provided to supply the first protein to the substrate. Inducing binding and, when the first protein and the first protein binding molecular sieve are bound, a cell solution of cells containing a second protein with a marker is supplied to the substrate;
    상기 시료 로딩부에 로딩된 상기 기판의 표면에 제1 파장을 갖는 근접장을 발생시키는 광학 여기부; 및An optical excitation portion generating a near field having a first wavelength on a surface of the substrate loaded in the sample loading portion; And
    상기 세포 용액이 상기 기판에 공급된 상태에서, 상기 제1 단백질과 상기 제2 단백질의 상호작용에 따른 상기 기판 표면에서의 상기 제1 파장의 제2 파장으로의 변화를 감지하는 광학 측정부An optical measuring unit configured to detect a change of the first wavelength to the second wavelength at the surface of the substrate according to the interaction of the first protein and the second protein while the cell solution is supplied to the substrate
    를 포함하며,Including;
    상기 광학 측정부가 측정한 상기 제2 파장의 형광 신호를 이미지 프로세싱을 통해 분석하는 신호 분석부를 더 포함하는 단백질-단백질 상호작용 분석 장치.And a signal analyzer configured to analyze the fluorescence signal of the second wavelength measured by the optical measuring unit through image processing.
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