Recent research indicates that besides nuclear transcription, RA can rapidly initiate phosphorylation cascades (such as the p38MAPK/MSK1 pathway) via a specialized pool of RARs in membrane lipid rafts. Therapeutic and Biological Significance
), encoded by different genes, with distinct tissue-specific expression patterns (e.g., RAR is dominant in skin). Mechanism.rar
RARs act as ligand-activated transcription factors that form heterodimers with Retinoid X Receptors (RXRs) to regulate gene expression. encoded by different genes
RAR signaling is essential for embryonic morphogenesis, specifically neural patterning, limb development, and organogenesis. with distinct tissue-specific expression patterns (e.g.
Binding of agonist ligands causes corepressors to dissociate and coactivator proteins to bind, promoting the transcription of target genes. Subtypes & Expression: There are three RAR subtypes (
