Receptor for arginine vasopressin. The activity of this receptor is mediated by G proteins which activate a phosphatidyl-inositol-calcium second messenger system. (Microbial infection) During SARS coronavirus-2/SARS-CoV-2 infection, may recognize and internalize the complex formed by AVP/Arg-vasopressin, SARS-CoV-2 spike protein and secreted ACE2 through DNM2/dynamin 2-dependent endocytosis. Belongs to the G-protein coupled receptor 1 family. Vasopressin/oxytocin receptor subfamily.