Epitope-captured antibody display
First Claim
1. A replicable genetic package/antibody reagent (package/antibody reagent) comprising:
- (i) a replicable genetic package having a heterologous nucleic acid segment that encodes a polypeptide displayed on the replicable genetic package; and
(ii) a captured antibody bound to the displayed polypeptide, wherein the captured antibody comprises a plurality of binding sites with a first binding site having specific binding affinity for the displayed polypeptide and is bound to the displayed polypeptide and a second binding site having specific affinity for the displayed polypeptide and is unbound.
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Accused Products
Abstract
Reagents and methods for detecting target proteins in a sample are provided. The reagents include a replicable genetic package, a protein displayed on an exterior surface of the package that is expressed from a heterologous nucleic acid borne by the package, and one or more antibodies complexed with the expressed protein and which have an open binding site for a target protein. Thus, a segment of the nucleic acid encodes for an epitope that is shared by the expressed polypeptide and the target protein. The reagents can be utilized individually or as part of a library or an array to bind target proteins within protein samples to form one or more complexes. By determining the sequence of the segment of the heterologous nucleic acid of a package within a complex, one can identify the target protein since the segment encodes for an epitope that is shared by the expressed and target proteins.
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Citations
21 Claims
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1. A replicable genetic package/antibody reagent (package/antibody reagent) comprising:
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(i) a replicable genetic package having a heterologous nucleic acid segment that encodes a polypeptide displayed on the replicable genetic package; and (ii) a captured antibody bound to the displayed polypeptide, wherein the captured antibody comprises a plurality of binding sites with a first binding site having specific binding affinity for the displayed polypeptide and is bound to the displayed polypeptide and a second binding site having specific affinity for the displayed polypeptide and is unbound. - View Dependent Claims (21)
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2. A collection of replicable genetic package/antibody reagents (package/antibody reagent), wherein each package/antibody reagent comprises:
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(i) a replicable genetic package having a heterologous nucleic acid segment that encodes a first polypeptide displayed on the replicable genetic package; and (ii) a captured antibody bound to the first displayed polypeptide, wherein the captured antibody comprises a plurality of binding sites with a first binding site having specific binding affinity for the first displayed polypeptide and is bound to the first displayed polypeptide and a second binding site having specific affinity for the first displayed polypeptide and is unbound; wherein at least some of the package/antibody reagents comprise the same first polypeptide bound to a different captured antibody and/or a different first polypeptide bound to a different captured antibody. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification