Exhaustive analysis of viral protein interactions by two-hybrid screens and selection of correctly folded viral interacting polypeptides
First Claim
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1. A method for detecting viral protein:
- protein interactions, said method comprising the steps of;
a) constructing a library of randomly-generated genomic viral DNA fragments in a DNA-binding domain vector;
b) constructing a library of randomly-generated genomic viral DNA fragments in an activation domain vector; and
c) assaying the library in the DNA-binding domain vector with the library in the activation domain vector by two-hybrid screening.
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Abstract
This invention relates to the detection and analysis of viral protein-protein interactions using a two-hybrid system. This invention allows the definition and use of minimal peptides involved in these protein-protein interactions. In particular, this invention relates to the use of a two-hybrid assay to screen for molecules that interact with hepatitis C virus proteins.
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Citations
21 Claims
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1. A method for detecting viral protein:
- protein interactions, said method comprising the steps of;
a) constructing a library of randomly-generated genomic viral DNA fragments in a DNA-binding domain vector;
b) constructing a library of randomly-generated genomic viral DNA fragments in an activation domain vector; and
c) assaying the library in the DNA-binding domain vector with the library in the activation domain vector by two-hybrid screening. - View Dependent Claims (2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 20)
- protein interactions, said method comprising the steps of;
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6. A method for detecting viral protein:
- protein interactions, said method comprising the steps of;
a) constructing a library of DNA fragments in a DNA binding domain vector, wherein at least one DNA fragment encodes at least one molecule that interacts with viral proteins, and wherein said at least one molecule is selected from the group consisting of protein, polypeptide, and peptide;
b) constructing a library of DNA fragments in an activation domain vector, wherein at least one DNA fragment encodes at least one molecule that interacts with viral proteins, and wherein said at least one molecule is selected from the group consisting of protein, polypeptide, and peptide; and
c) assaying the library in the DNA-binding vector with the library in the activation domain vector by two-hybrid screening. - View Dependent Claims (7)
- protein interactions, said method comprising the steps of;
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14. A method for detecting specific viral protein epitopes in a biological sample, said method comprising the steps of:
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a) contacting expression products from at least one of said libraries of claim I with an hyperimmune serum;
b) visualizing immunocomplexes formed between specific antibodies present in said serum and epitopes present on said expression products; and
, optionally,c) determining the sequence of the expressed epitopes selected.
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19. A method of diagnosing a viral infection in a biological sample, said method comprising the steps of:
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a) contacting the biological sample with a library of randomly-generated genomic viral DNA fragments in a DNA-binding domain vector, or in an activation domain vector, under conditions where said viral DNA fragments are expressed; and
b) detecting interaction between expression products from said viral DNA fragments and at least one molecule present in said biological sample;
wherein interaction indicates a viral infection.
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21. A diagnostic kit for the detection of a viral infection in a biological sample, said kit comprising at least:
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a) a library or a collection;
b) a medium or a support suitable for detecting viral protein;
protein interaction and;
c) a medium suitable for revealing the presence of the type of viral protein.
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Specification