Dopamine receptor whose activity is mediated by G proteins which inhibit adenylyl cyclase (PubMed:21645528). Positively regulates postnatal regression of retinal hyaloid vessels via suppression of VEGFR2/KDR activity, downstream of OPN5 (By similarity). Forms homo- and heterooligomers with DRD4 (PubMed:21184734). The interaction with DRD4 may modulate agonist-induced downstream signaling (PubMed:21184734). Interacts with CADPS and CADPS2 (PubMed:15857609). Interacts with GPRASP1, PPP1R9B and CLIC6 (By similarity). Interacts with ARRB2 (By similarity). Interacts with HTR2A (PubMed:21645528). Interacts with GNAI2 isoform sGi2, the interaction allows the creation of an intracellular pool of DRD2 that can be released to cell surface upon agonist stimulation (PubMed:17550964). Interacts with DRD1 (By similarity). Interacts with KCNA2 (By similarity). Expressed in the anterior pituitary gland. Expressed in the anterior pituitary gland. Palmitoylated. Palmitoylation which is required for proper localization to the plasma membrane and stability of the receptor could be carried on by ZDHHC4, ZDHHC3 and ZDHHC8. Genetic variations in DRD2 may determine the genetic susceptibility to alcoholism [MIM:103780]. Genetic variations in DRD2 might be a protective factor against the development of withdrawal symptoms but might also be a risk factor in a highly burdened subgroup of alcoholics with a paternal and grandpaternal history of alcoholism and might contribute to suicide risk in alcoholics. Belongs to the G-protein coupled receptor 1 family.