Adapter-directed display systems
First Claim
1. An adapter-directed display system for displaying an exogenous polypeptide on the outer surface of a phage particle, comprising:
- (a) an expression vector comprising a coding sequence that encodes the exogenous polypeptide fused in-frame to a first adapter sequence, wherein the vector is devoid of outer-surface sequences encoding functional outer-surface proteins of the phage particle;
(b) a helper vector comprising outer-surface sequences encoding outer-surface proteins necessary for packaging the phage particle, wherein at least one of the outer-surface proteins is fused in-frame to a second adapter,said first and second adapters acting, when the polypeptide is produced in a suitable host cell, to cause the display of the polypeptide via pairwise interaction between the first and second adapters.
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Abstract
The present invention provides adapter-directed display systems for expressing exogenous polypeptide within a host cell and/or displaying the exogenous polypeptide on the outer surface of a genetic package. This subject systems are particularly useful for displaying a genetically diverse repertoire of monomeric and multimeric polypeptides. The invention also provides both expression and helper vectors and kits containing components of the subject display systems. Also provided are genetic packages displaying the exogenous polypeptides of particular interest. Further provided by the invention are methods of using the subject display systems.
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Citations
44 Claims
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1. An adapter-directed display system for displaying an exogenous polypeptide on the outer surface of a phage particle, comprising:
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(a) an expression vector comprising a coding sequence that encodes the exogenous polypeptide fused in-frame to a first adapter sequence, wherein the vector is devoid of outer-surface sequences encoding functional outer-surface proteins of the phage particle; (b) a helper vector comprising outer-surface sequences encoding outer-surface proteins necessary for packaging the phage particle, wherein at least one of the outer-surface proteins is fused in-frame to a second adapter, said first and second adapters acting, when the polypeptide is produced in a suitable host cell, to cause the display of the polypeptide via pairwise interaction between the first and second adapters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 24, 26, 28, 29, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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15. An expression vector for producing an exogenous polypeptide on the outer surface of a phage particle, comprising:
- a coding sequence encoding the exogenous polypeptide fused in-frame to a first adapter, wherein the vector is devoid of outer-surface sequences encoding functional outer-surface proteins of the phage particle, and expression of the exogenous polypeptide on the outer surface of the phage particle is mediated via non-covalent pairwise interaction between the first adapter and a second adapter, wherein the second adapter is fused to an outer-surface protein.
- View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 25, 27)
- 30. A phage particle displaying on its outer surface a fusion polypeptide, said fusion polypeptide comprising an exogenous polypeptide sequence that is displayed, fused in-frame with a first adapter, said first adapter acting, when the fusion polypeptide is produced in a suitable host cell, to cause the display of the fusion polypeptide via non-covalent pairwise interaction between the first adapter and a second adapter that is linked to an outer-surface protein.
Specification