Unit

UNIT 20.7 Two-Hybrid Dual Bait System

  1. Elena Kotova,
  2. Thomas Coleman,
  3. Ilya Serebriiskii

Published Online: 1 APR 2009

DOI: 10.1002/0471142727.mb2007s86

Current Protocols in Molecular Biology

Current Protocols in Molecular Biology

How to Cite

Kotova, E., Coleman, T. and Serebriiskii, I. 2009. Two-Hybrid Dual Bait System. Current Protocols in Molecular Biology. 86:20.7:20.7.1–20.7.32.

Author Information

  1. Fox Chase Cancer Center, Philadelphia, Pennsylvania

Publication History

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

Abstract

The yeast two-hybrid system, or interaction trap, is one of the most versatile methods available with which to identify and establish protein-protein interactions. The dual bait system is one adaptation of the classic approach. This system facilitates the simultaneous comparison of two distinct baits with one prey. One protein of interest is expressed as a fusion to the DNA-binding protein LexA (bait 1), while a second protein of interest is expressed as a fusion to the DNA-binding protein cI (bait 2). Strains of yeast engineered for screening of these dual baits possess four separate reporter genes. A plasmid expressing an activation domain-fused protein (prey), which can be either a defined protein interactor or a cDNA library, is also expressed to allow dual hybrid-mediated transcriptional activation. Curr. Protoc. Mol. Biol. 86:20.7.1-20.7.32. © 2009 by John Wiley & Sons, Inc.

Keywords:

  • interactions;
  • yeast two-hybrid;
  • interaction trap;
  • interaction mating;
  • increased specificity