Enables G protein-coupled receptor activity. Involved in regulation of synaptic vesicle exocytosis. Acts upstream of or within several processes, including positive regulation of cGMP-mediated signaling; positive regulation of chronic inflammatory response to non-antigenic stimulus; and positive regulation of cytokine production. Located in Schaffer collateral - CA1 synapse; glutamatergic synapse; and plasma membrane. Is active in synapse. Is expressed in several structures, including cardiovascular system; central nervous system; eye; genitourinary system; and gut. Orthologous to human ADORA2B (adenosine A2b receptor). [provided by Alliance of Genome Resources, Apr 2022]