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The retinoid X receptor (RXR) is a type of nuclear receptor that is activated by 9-cis retinoic acid, which has never been convincingly proven to be of physiological relevance and to be present endogenously, as well as 9-cis-13,14-dihydro-retinoic acid. There are three retinoic X receptors (RXR): RXR-alpha, RXR-beta, and RXR-gamma, encoded by the , , genes, respectively. RXR heterodimerizes with subfamily 1 nuclear receptors including CAR, FXR, LXR, PPAR, PXR, RAR, TR, and VDR. As with other type II nuclear receptors, the RXR heterodimer in the absence of ligand is bound to hormone response elements complexed with corepressor protein. Binding of agonist ligands to RXR results in dissociation of corepressor and recruitment of coactivator protein, which, in turn, promotes transcription of the downstream target gene into mRNA and eventually protein. ==See also== * Retinoic acid receptor * Retinoid X receptor alpha * Retinoid X receptor beta * Retinoid X receptor gamma 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Retinoid X receptor」の詳細全文を読む スポンサード リンク
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