Polypeptide display libraries and methods of making and using thereof
First Claim
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1. A method for identifying a target in a sample, the method comprising:
- (a) contacting the sample with a fusion protein, wherein the fusion protein comprises an outer membrane protein and a passenger polypeptide, wherein the outer membrane protein is a bacterial outer membrane protein OmpA, OmpX, or OmpT;
(i) wherein a native N-terminus and a native C-terminus of the outer membrane protein are joined by a linker,(ii) wherein the outer membrane protein comprises a non-native N-terminus and a non-native C-terminus derived from an extracellular loop of the outer membrane protein, and(iii) wherein the passenger polypeptide is fused to the non-native N-terminus or the non-native C-terminus of the outer membrane protein; and
(b) detecting a specific interaction between the passenger polypeptide and the target, wherein the presence of the specific interaction is indicative of the presence of the target in the sample.
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Abstract
Disclosed herein are expression vectors which display a passenger polypeptide on the outer surface of a biological entity. As disclosed herein the displayed passenger polypeptide is capable of interacting or binding with a given ligand. Also disclosed are methods of making and using the expression vectors. N/C terminal fusion expression vectors and methods of making and using are also disclosed.
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Citations
17 Claims
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1. A method for identifying a target in a sample, the method comprising:
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(a) contacting the sample with a fusion protein, wherein the fusion protein comprises an outer membrane protein and a passenger polypeptide, wherein the outer membrane protein is a bacterial outer membrane protein OmpA, OmpX, or OmpT; (i) wherein a native N-terminus and a native C-terminus of the outer membrane protein are joined by a linker, (ii) wherein the outer membrane protein comprises a non-native N-terminus and a non-native C-terminus derived from an extracellular loop of the outer membrane protein, and (iii) wherein the passenger polypeptide is fused to the non-native N-terminus or the non-native C-terminus of the outer membrane protein; and (b) detecting a specific interaction between the passenger polypeptide and the target, wherein the presence of the specific interaction is indicative of the presence of the target in the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification