G-protein coupled estrogen receptor 1 (GPER1) promotes neuritogenesis in developing hippocampal neurons. It plays a role in acute neuroprotection against NMDA-induced excitotoxic neuronal death and increases firing activity and intracellular calcium oscillations in luteinizing hormone-releasing hormone (LHRH) neurons. GPER1 inhibits mature adipocyte differentiation and lipid accumulation, and is involved in the recruitment of beta-arrestin 2 ARRB2 at the plasma membrane in epithelial cells. It also functions as a receptor for aldosterone, mediating rapid regulation of vascular contractibility through the PI3K/ERK signaling pathway. Finally, it is implicated in cancer progression. References: The UniProt Consortium. Nucleic Acids Res. 47: D506-515 (2019); Nucleic Acids Res. 2016 Jan 4;44(D1):D733-45, PMID:26553804