Oxysterols Receptor LXR-Alpha (NR1H3) ELISA Kit for Human

The protein encoded by this gene belongs to the NR1 subfamily of the nuclear receptor superfamily. The NR1 family members are key regulators of macrophage function, controlling transcriptional programs involved in lipid homeostasis and inflammation. This protein is highly expressed in visceral organs, including liver, kidney and intestine. It forms a heterodimer with retinoid X receptor (RXR), and regulates expression of target genes containing retinoid response elements. Studies in mice lacking this gene suggest that it may play an important role in the regulation of cholesterol homeostasis. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2011]

LXR-alpha: Orphan receptor. Interaction with RXR shifts RXR from its role as a silent DNA-binding partner to an active ligand- binding subunit in mediating retinoid responses through target genes defined by LXRES. LXRES are DR4-type response elements characterized by direct repeats of two similar hexanuclotide half- sites spaced by four nucleotides. Plays an important role in the regulation of cholesterol homeostasis, regulating cholesterol uptake through MYLIP-dependent ubiquitination of LDLR, VLDLR and LRP8. Belongs to the nuclear hormone receptor family. NR1 subfamily. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Motility/polarity/chemotaxis; Nuclear receptor; DNA-binding

Chromosomal Location of Human Ortholog: 11p11.2

Cellular Component: nuclear chromatin; nucleoplasm; nucleus; receptor complex

Molecular Function: cholesterol binding; DNA binding; ligand-dependent nuclear receptor activity; protein binding; sequence-specific DNA binding; steroid hormone receptor activity; sterol response element binding; transcription coactivator activity; zinc ion binding

Biological Process: apoptotic cell clearance; cholesterol homeostasis; gene expression; intracellular receptor-mediated signaling pathway; lipid homeostasis; negative regulation of inflammatory response; negative regulation of lipid transport; negative regulation of macrophage activation; negative regulation of pinocytosis; negative regulation of transcription from RNA polymerase II promoter; positive regulation of cellular protein metabolic process; positive regulation of cholesterol transport; positive regulation of fatty acid biosynthetic process; positive regulation of lipoprotein lipase activity; positive regulation of toll-like receptor 4 signaling pathway; positive regulation of transcription from RNA polymerase II promoter; positive regulation of transcription, DNA-dependent; regulation of circadian rhythm; response to progesterone stimulus; steroid hormone mediated signaling; sterol homeostasis; transcription initiation from RNA polymerase II promoter