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Related Concept Videos

Transducer Mechanism: Nuclear Receptors01:31

Transducer Mechanism: Nuclear Receptors

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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

Mediator-dependent nuclear receptor function.

Wei Chen1, Robert G Roeder

  • 1Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, 1230 York Ave., New York, NY 10065, USA. chenw@rockefeller.edu

Seminars in Cell & Developmental Biology
|August 23, 2011
PubMed
Summary
This summary is machine-generated.

Nuclear receptors regulate genes via coactivator complexes. Mediator, a key coactivator, interacts with nuclear receptors to control gene transcription, chromatin remodeling, and metabolic pathways.

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Reverse Yeast Two-hybrid System to Identify Mammalian Nuclear Receptor Residues that Interact with Ligands and/or Antagonists
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Area of Science:

  • Molecular Biology
  • Gene Regulation
  • Biochemistry

Background:

  • Nuclear receptors are transcription factors crucial for biological processes.
  • Gene transcription requires coactivator complexes for chromatin remodeling and preinitiation complex (PIC) formation.
  • Mediator is a vital coactivator interacting with nuclear receptors.

Purpose of the Study:

  • To review Mediator's role in nuclear receptor-mediated transcription.
  • To explore Mediator recruitment, interaction mechanisms, and functions.
  • To discuss Mediator's emerging corepressor role and signaling transmission.

Main Methods:

  • Literature review and synthesis of current understanding.
  • Discussion of nuclear receptor-Mediator interactions.
  • Analysis of Mediator's role in various metabolic pathways.

Main Results:

  • Mediator is recruited to nuclear receptor target gene enhancers and promoters.
  • Specific domains (NR AF2, MED1 LXXLL motifs) mediate nuclear receptor-Mediator interactions.
  • Mediator functions in diverse metabolic pathways and can act as a corepressor.

Conclusions:

  • Mediator is a versatile nuclear receptor coregulator with diverse functions.
  • Mediator transmits signals from enhancers to core promoters, influencing PIC formation.
  • Mediator modulates nuclear receptor signaling through multiple mechanisms.