Trypsin display on the surface of bacteriophage

David R. Corey, Andrew K. Shiau, Yang Qing, Bethany A. Janowski, Charles S. Craik

Research output: Contribution to journalArticlepeer-review

84 Scopus citations


The gene III and VIII-encoded coat proteins (pIII and pVIII) from bacteriophage M13 have been fused to the C terminus of the serine protease, trypsin (Tsn). The genes encoding the fusions were then inserted directly into M13mp18 to create vectors which expressed both the Tsn-coat protein hybrids and the wild-type (wt) coat proteins. Immunoblot analysis confirmed that the bacteriophage express Tsn on their surface. Isolated fusion phage possess kinetic parameters which approximate those of the wt enzyme. An endogenous Escherichia coli protease inhibitor, ecotin, copurifies with the Tsn phage. Immobilized ecotin can be used to selectively bind bacteriophage which express Tsn::pIII fusion proteins.

Original languageEnglish (US)
Pages (from-to)129-134
Number of pages6
Issue number1
StatePublished - Jun 15 1993


  • Ecotin
  • fusion proteins
  • phage M13
  • phagemid
  • protein engineering
  • serine protease

ASJC Scopus subject areas

  • Genetics


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