该基因编码G蛋白偶联受体基因家族的一个成员编码蛋白与血管紧张素受体有关，但实际上是一种抑制腺苷酸环化酶活性的apelin受体，通过发挥高血压作用，对血管紧张素ii的压力作用起反调节作用。它在心血管和中枢神经系统、葡萄糖代谢、胚胎和肿瘤血管生成以及作为人类免疫缺陷病毒（HIV-1）受体发挥作用由选择性剪接产生的两个转录变体已经被鉴定。[由RefSeq提供，2009年7月]
This gene encodes a member of the G protein-coupled receptor gene family. The encoded protein is related to the angiotensin receptor, but is actually an apelin receptor that inhibits adenylate cyclase activity and plays a counter-regulatory role against the pressure action of angiotensin II by exerting hypertensive effect. It functions in the cardiovascular and central nervous systems, in glucose metabolism, in embryonic and tumor angiogenesis and as a human immunodeficiency virus (HIV-1) coreceptor. Two transcript variants resulting from alternative splicing have been identified. [provided by RefSeq, Jul 2009]