The protein encoded by this gene is an adenosine receptor that belongs to the G-protein coupled receptor 1 family. There are 3 types of adenosine receptors, each with a specific pattern of ligand binding and tissue distribution, and together they regulate a diverse set of physiologic functions. The type A1 receptors inhibit adenylyl cyclase, and play a role in the fertilization process. Animal studies also suggest a role for A1 receptors in kidney function and ethanol intoxication. Transcript variants with alternative splicing in the 5' UTR have been found for this gene. [provided by RefSeq, Jul 2008],RDC7,Apoptosis,Cardiovascular,Cell Biology & Developmental Biology,Cell Intrinsic Innate Immunity Signaling Pathway,G protein signaling,G protein signaling_G-Protein-Coupled Receptors(GPCR),Heart,Heart_Cardiac arrhythmias,Immunology & Inflammation,Neuroscience,Signal Transduction,ADORA1