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Updated: Jun 27, 2026

Reverse Yeast Two-hybrid System to Identify Mammalian Nuclear Receptor Residues that Interact with Ligands and/or Antagonists
Published on: November 15, 2013
Peroxisome proliferator-activated receptor gamma is constitutively activated in yeast
Monika Mueller1, Alois Jungbauer
1Christian Doppler Laboratory for Receptor Biotechnology, Department of Biotechnology, University of Natural Resources and Applied Life Sciences, Vienna, Austria.
Abstract:
A rapid, simple in vitro test system for high-throughput screening of peroxisome proliferator-activated receptor (PPAR) gamma agonists would be of interest for testing new antidiabetic drugs, alternative medicine, or environmental samples. A yeast two-hybrid assay based on the ligand-dependent recruitment of the coactivator CBP (CREB-binding protein) was constructed. In this system PPARgamma was constitutively activated and the signal was not further increased significantly by adding agonists. In yeast we identified oleic acid as a putative endogenous ligand. Furthermore yeasts seem to lack regulatory mechanisms present in mammalian cells. Mammalian systems are an alternative for screening PPARgamma agonists.
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