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. . This is the function of ENSG00000198049 (AVPR1B, arginine vasopressin receptor 1B).