Ligand-dependent nuclear receptor corepressor LCoR functions by histone deacetylase-dependent and -independent mechanisms

Mol Cell. 2003 Jan;11(1):139-50. doi: 10.1016/s1097-2765(03)00014-5.

Abstract

LCoR (ligand-dependent corepressor) is a transcriptional corepressor widely expressed in fetal and adult tissues that is recruited to agonist-bound nuclear receptors through a single LXXLL motif. LCoR binding to estrogen receptor alpha depends in part on residues in the coactivator binding pocket distinct from those bound by TIF-2. Repression by LCoR is abolished by histone deacetylase inhibitor trichostatin A in a receptor-dependent fashion, indicating HDAC-dependent and -independent modes of action. LCoR binds directly to specific HDACs in vitro and in vivo. Moreover, LCoR functions by recruiting C-terminal binding protein corepressors through two consensus binding motifs and colocalizes with CtBPs in the nucleus. LCoR represents a class of corepressor that attenuates agonist-activated nuclear receptor signaling by multiple mechanisms.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Amino Acid Motifs
  • Amino Acid Sequence
  • Animals
  • Binding Sites
  • COS Cells
  • Enzyme Inhibitors / metabolism
  • Estrogen Receptor alpha
  • Fetus / physiology
  • Genes, Reporter
  • Histone Deacetylase Inhibitors
  • Histone Deacetylases / genetics
  • Histone Deacetylases / metabolism*
  • Humans
  • Hydroxamic Acids / metabolism
  • In Situ Hybridization
  • Ligands
  • Molecular Sequence Data
  • Nuclear Proteins / genetics
  • Nuclear Proteins / metabolism
  • Nuclear Receptor Coactivator 2
  • Placenta / cytology
  • Placenta / physiology
  • Protein Binding
  • Receptors, Estrogen / genetics
  • Receptors, Estrogen / metabolism
  • Recombinant Fusion Proteins / genetics
  • Recombinant Fusion Proteins / metabolism
  • Repressor Proteins / chemistry
  • Repressor Proteins / genetics
  • Repressor Proteins / metabolism*
  • Sequence Alignment
  • Transcription Factors / metabolism
  • Transcriptional Activation
  • Tumor Cells, Cultured
  • Two-Hybrid System Techniques

Substances

  • Enzyme Inhibitors
  • Estrogen Receptor alpha
  • Histone Deacetylase Inhibitors
  • Hydroxamic Acids
  • LCOR protein, human
  • Ligands
  • NCOA2 protein, human
  • Nuclear Proteins
  • Nuclear Receptor Coactivator 2
  • Receptors, Estrogen
  • Recombinant Fusion Proteins
  • Repressor Proteins
  • Transcription Factors
  • trichostatin A
  • Histone Deacetylases