Follicle Stimulating Hormone Receptor (FSHR)

The follicle stimulating hormone receptor is a transmembrane receptor that interacts with the follicle stimulating hormone (FSH) and represents a G protein-coupled receptor (GPCR). Its activation is necessary for the hormonal functioning of FSH. FSHRs are found in the ovary, testis, and uterus.The FSHR consists of 695 amino acids and has a molecular mass of about 76 kDa. Like other GPCRs, the FSH-receptor possess seven membrane-spanning domains or transmembrane helices.Upon binding FSH externally to the membrane, a transduction of the signal takes place that activates the G protein that is bound to the receptor internally. With FSH attached, the receptor shifts conformation and thus mechanically activates the G protein, which detaches from the receptor and activates the cAMP system.