GO:0004962

Combining with endothelin and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex. [GOC:bf, GOC:dph, GOC:signaling, IUPHAR_GPCR:1283, IUPHAR_RECEPTOR:2263, IUPHAR_RECEPTOR:2265]