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Polypeptide display libraries and methods of making and using thereof

  • US 10,041,063 B2
  • Filed: 08/07/2015
  • Issued: 08/07/2018
  • Est. Priority Date: 08/18/2003
  • Status: Active Grant
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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