GNA15

Member of the G protein alpha subunit family that plays a crucial role in intracellular signaling. Functions as a molecular switch, transducing signals from G protein-coupled receptors (GPCRs) to downstream effectors. In collaboration with the adapter protein TTC1, promotes HRAS activation and ERK1/2 phosphorylation independently of phospholipase Cbeta signaling. Also initiates EMR2-mediated signaling, leading to activation of Akt, MAPK, and NF-kappa-B, which in turn drives macrophage differentiation and inflammatory responses..

Function from UniProtKB (P30679), read 2026-09-23. CC BY 4.0.