UNIT 19.2 Interaction Trap/Two-Hybrid System to Identify Interacting Proteins

  1. Erica A. Golemis1,
  2. Ilya Serebriiskii1,
  3. Russell L. Finley Jr. (hunt by interaction mating)2,
  4. Mikhail G. Kolonin (hunt by interaction mating)2,
  5. Jeno Gyuris3,
  6. Roger Brent4

Published Online: 1 AUG 2009

DOI: 10.1002/0471140864.ps1902s57

Current Protocols in Protein Science

Current Protocols in Protein Science

How to Cite

Golemis, E. A., Serebriiskii, I., Finley, R. L., Kolonin (hunt by interaction mating), M. G., Gyuris, J. and Brent, R. 2009. Interaction Trap/Two-Hybrid System to Identify Interacting Proteins. Current Protocols in Protein Science. 57:19.2:19.2.1–19.2.35.

Author Information

  1. 1

    Fox Chase Cancer Center, Philadelphia, Pennsylvania

  2. 2

    Wayne State University School of Medicine, Detroit, Michigan

  3. 3

    Mitotix, Inc., Cambridge, Massachusetts

  4. 4

    The Molecular Sciences Institute, Berkeley, California

Publication History

  1. Published Online: 1 AUG 2009
  2. Published Print: AUG 2009


The yeast two-hybrid method (or interaction trap) is a powerful technique for detecting protein interactions. The procedure is performed using transcriptional activation of a dual reporter system in yeast to identify interactions between a protein of interest (the bait protein) and the candidate proteins for interaction. The method can be used to screen a protein library for interactions with a bait protein or to test for association between proteins that are expected to interact based on prior evidence. Interaction mating facilitates the screening of a library with multiple bait proteins. Curr. Protoc. Protein Sci. 57:19.2.1-19.2.35. © 2009 by John Wiley & Sons, Inc.


  • protein interactions;
  • yeast two-hybrid;
  • interaction trap;
  • interaction mating