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Updated: Mar 26, 2026

Reverse Yeast Two-hybrid System to Identify Mammalian Nuclear Receptor Residues that Interact with Ligands and/or Antagonists
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Published on: November 15, 2013

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Allosteric Pathways in the PPARγ-RXRα nuclear receptor complex

Clarisse G Ricci1, Rodrigo L Silveira1, Ivan Rivalta2,3

  • 1Institute of Chemistry, University of Campinas-UNICAMP, Cx. P. 6154, Campinas SP 13084-862, Brazil.

Scientific Reports
|January 30, 2016
PubMed

Insights

Allostery in nuclear receptor (NR) complexes, like the peroxisome proliferator-activated/retinoid X receptor, is key for drug development. Understanding these DNA-binding protein dynamics can lead to new treatments for metabolic diseases.

Area of Science:

  • Molecular biology
  • Biochemistry
  • Structural biology

Background:

  • Nuclear receptors (NRs) regulate gene transcription and are crucial drug targets.
  • Allostery in NR-DNA complexes is vital for understanding drug mechanisms.
  • The peroxisome proliferator-activated/retinoid X receptor (PPARγ/RXR) complex is a target for antidiabetic drugs.

Purpose of the Study:

  • To investigate allosteric mechanisms in the PPARγ/RXR heterodimer.
  • To identify interdependent motions and their role in transcriptional regulation.
  • To understand how DNA sequence dynamics influence NR function.

Main Methods:

  • Molecular dynamics simulations of the PPARγ/RXR-DNA complex.
  • Statistical network analysis of correlated motions.
  • Analysis of conformational changes and mutation effects.

Main Results:

  • Identified interdependent motions between Ω-loops and the PPARγ DNA-binding domain.
  • Discovered allosteric pathways involving polar amino acid residues.
  • Found that DNA sequence-dependent dynamics influence transcriptional regulation.

Conclusions:

  • Allosteric communication within the PPARγ/RXR complex is mediated by specific protein dynamics.
  • These findings provide insights into the design of allosteric modulators for NRs.
  • Understanding allostery is critical for developing targeted therapies for metabolic disorders.

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