Estrogen receptor alpha, Estrogen receptor beta, G protein-coupled estrogen receptor 1 (ERα, ERβ, GPER1)

Estrogen receptors are intracellular (ERα, ERβ) and membrane-bound (GPER1) protein molecules that bind estrogen hormones and regulate gene transcription and cellular signaling[1][2][3]. ERα and ERβ, encoded by ESR1 and ESR2 respectively, belong to the nuclear receptor family and operate mainly as ligand-activated transcription factors, mediating the genomic effects of estrogen in tissues such as breast, uterus, bone, and CNS. GPER1 is a membrane-associated, seven-transmembrane G protein-coupled receptor mediating rapid non-genomic estrogen signaling. Structural features include DNA-binding domains (which recognize estrogen response elements in gene promoters), ligand-binding domains, and transcriptional activation regions. Estrogen receptor function is essential for sexual development, reproductive tissue maintenance, and has roles in cell proliferation, differentiation, and survival. Aberrant estrogen receptor signaling contributes to diseases such as hormone-responsive cancers, cardiovascular disease, and osteoporosis[1][2][3][4].

Other names

ERαER-betaESR1ESR2GPERGPR30nuclear estrogen receptormembrane estrogen receptor

Agonism (activates receptor); Antagonism (blocks receptor); Selective modulation (SERMs: partial agonist/antagonist depending on tissue)