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Rarb | Retinoic acid receptor beta; Receptor for retinoic acid. Retinoic acid receptors bind as heterodimers to their target response elements in response to their ligands, all-trans or 9-cis retinoic acid, and regulate gene expression in various biological processes. The RAR/RXR heterodimers bind to the retinoic acid response elements (RARE) composed of tandem 5'-AGGTCA-3' sites known as DR1-DR5. In the absence of ligand, acts mainly as an activator of gene expression due to weak binding to corepressors (By similarity). The RXRA/RARB heterodimer can act as a repressor on the DR1 element and [...] (448 aa) | ||||
Cyp4f18 | Cytochrome P450 4F3; A cytochrome P450 monooxygenase involved in the metabolism of the proinflammatory lipid mediator leukotriene B4 (LTB4). Hydroxylates at the omega-1 and omega-2 positions LTB4. This oxidation step leads to LTB4 inactivation, which is postulated to be a crucial part of the resolution of inflammation. Mechanistically, uses molecular oxygen inserting one oxygen atom into a substrate, and reducing the second into a water molecule, with two electrons provided by NADPH via cytochrome P450 reductase (CPR; NADPH-ferrihemoprotein reductase). (524 aa) |