ADGRF5
Function
Adhesion G protein-coupled receptor (PubMed:28570277). In alveolar type II (ATII or AT2) cells, required for normal lung surfactant homeostasis (PubMed:28570277). Modulation of both surfactant secretion and uptake by ATII cells is mediated by the downstream activation of GNAQ/GNA11 proteins and may be a consequence of increased cortical F-actin assembly induced by ADGRF5 activation (PubMed:28570277). In the kidney, may play a role in the regulation of acid excretion into the primary urine, possibly by regulating the surface expression of V-ATPase proton pump (By similarity). As a receptor for soluble FNDC4 (sFNDC4), required for proper systemic glucose tolerance, specifically sensitizing white adipose tissue to insulin. Plays also a role in sFNDC4-induced decrease of local inflammation in white adipose tissue (PubMed:34016966).
Post-translational modifications
Highly glycosylated.
Proteolytically cleaved at multiple sites: one in the GPS region of the GAIN-B domain (S1 site) and the other in the SEA domain (S2 site). The proteolytic cleavage at S1 site generates an extracellular subunit and a seven-transmembrane subunit. The proteolytic cleavage at S2 site generates a fragment that undergoes proteolytic cleavage by the processing enzyme furin.
Sequence Similarities
Belongs to the G-protein coupled receptor 2 family. Adhesion G-protein coupled receptor (ADGR) subfamily.
Tissue Specificity
Expressed in lung endothelial cells and in alveolar type II (ATII) cells (at protein level) (PubMed:23684610, PubMed:28570277). Expressed high levels in subcutaneous adipose tissue in lean individuals and at lower levels in visceral fat. Expression levels in subcutaneous adipose tissue drastically drop in obese individuals (PubMed:34016966).
Cellular localization
- Cell membrane
- Multi-pass membrane protein
Alternative names
GPR116, KIAA0758, ADGRF5, Adhesion G protein-coupled receptor F5, G-protein coupled receptor 116