G protein-coupled estrogen receptor 1 and membrane-associated Estrogen receptor alpha (GPER1/mERα)

Estrogen signaling via membrane-associated receptors, specifically the G protein-coupled estrogen receptor 1 (GPER1, formerly GPR30) and membrane-localized estrogen receptor alpha (mERα), mediates the rapid, non-genomic effects of estrogen (Prossnitz & Barton, 2011, Nature Reviews Endocrinology). Unlike classical nuclear estrogen receptors that regulate gene transcription over hours, these membrane-bound proteins trigger immediate signaling cascades, including the MAPK/ERK, PI3K/Akt, and calcium signaling pathways, within seconds or}

Other names

GPR30G-protein coupled estrogen receptormERmembrane-bound estrogen receptorER-XGPERESR1 (membrane-localized)

Activation of membrane-bound GPER1 or mERα initiates rapid intracellular signaling cascades, such as Src-mediated EGFR transactivation, which subsequently activates the MAPK/ERK and PI3K/Akt pathways, leading to rapid cellular responses independent of direct gene transcription (Prossnitz & Barton, 2011, Nature Reviews Endocrinology).