GRM3（glutamate metabotropic receptor 3），癌症关联基因，基因ID：2913，谷氨酸是中枢神经系统中主要的兴奋性神经递质，激活离子型和代谢型谷氨酸受体。谷氨酸能神经传递参与了正常大脑功能的大部分方面，在许多神经病理学条件下可能受到干扰。代谢型谷氨酸受体是一个g蛋白偶联受体家族，根据序列同源性、推测的信号转导机制和药理特性可分为3类。I组包括GRM1和GRM5，这些受体已被证明激活磷脂酶C。II组包括GRM2和GRM3，而III组包括GRM4、GRM6、GRM7和GRM8。II和III类受体与环AMP级联的抑制有关，但它们的激动剂选择性不同。[由RefSeq提供，2008年7月]L-glutamate is the major excitatory neurotransmitter in the central nervous system and activates both ionotropic and metabotropic glutamate receptors. Glutamatergic neurotransmission is involved in most aspects of normal brain function and can be perturbed in many neuropathologic conditions. The metabotropic glutamate receptors are a family of G protein-coupled receptors， that have been divided into 3 groups on the basis of sequence homology， putative signal transduction mechanisms， and pharmacologic properties. Group I includes GRM1 and GRM5 and these receptors have been shown to activate phospholipase C. Group II includes GRM2 an。