Enables several functions, including G protein-coupled adenosine receptor activity; G-protein beta/gamma-subunit complex binding activity; and heterotrimeric G-protein binding activity. Involved in several processes, including lipid homeostasis; modulation of chemical synaptic transmission; and regulation of secretion. Located in several cellular components, including axon; basolateral plasma membrane; and synaptic membrane. Is active in calyx of Held. Is integral component of postsynaptic membrane and integral component of presynaptic membrane. Used to study cerebral infarction; hypertension; lung disease; and obstructive sleep apnea. Human ortholog(s) of this gene implicated in asthma. Orthologous to human ADORA1 (adenosine A1 receptor). [provided by Alliance of Genome Resources, Apr 2022]