Retinoid X receptor alpha

Retinoid X receptor alpha (RXR-alpha), also known as NR2B1 (nuclear receptor subfamily 2, group B, member 1) is a is_associated_with::nuclear receptor that in humans is encoded by the RXRA gene.

Function
is_associated_with::Retinoid X receptors (RXRs) and is_associated_with::retinoic acid receptors (RARs), are nuclear receptors that mediate the biological effects of retinoids by their involvement in is_associated_with::retinoic acid-mediated gene activation. These receptors exert their action by binding, as homodimers or heterodimers, to specific sequences in the promoters of target genes and regulating their transcription. The protein encoded by this gene is a member of the steroid and is_associated_with::thyroid hormone receptor superfamily of is_associated_with::transcription factors. In the absence of ligand, the RXR-RAR heterodimers associate with a multiprotein complex containing transcription corepressors that induce histone deacetylation, chromatin condensation and transcriptional suppression. On ligand binding, the corepressors dissociate from the receptors and associate with the coactivators leading to transcriptional activation. The RXRA/PPARA heterodimer is required for is_associated_with::PPARA transcriptional activity on fatty acid oxidation genes such as is_associated_with::ACOX1 and the is_associated_with::cytochrome P450 system genes.

Interactions
Retinoid X receptor alpha has been shown to interact with:


 * is_associated_with::BCL3,
 * is_associated_with::BRD8,
 * is_associated_with::CLOCK,
 * FXR
 * is_associated_with::IGFBP3,
 * is_associated_with::ITGB3BP,
 * LXR-β,
 * is_associated_with::MyoD,
 * is_associated_with::NCOA6,
 * is_associated_with::NFKBIB,
 * is_associated_with::NPAS2,
 * is_associated_with::NRIP1,
 * NR4A1,
 * NCOA2,
 * NCOA3,
 * is_associated_with::POU2F1,
 * is_associated_with::PPARGC1A,
 * PPAR-γ,
 * is_associated_with::RNF8,
 * RAR-α,
 * SHP,
 * is_associated_with::TADA3L,
 * TBP,
 * is_associated_with::TRIM24,
 * TR-β, and
 * VDR.