该基因编码的蛋白属于肌醇1，4，5-三磷酸受体家族，其成员是细胞内第二信使钙释放通道。这些蛋白质介导细胞质钙的增加，以响应受体激活的肌醇三磷酸生产肌醇三磷酸受体介导的信号转导涉及细胞迁移、细胞分裂、平滑肌收缩和神经元信号转导等多个过程。这种蛋白质是一种2型受体，由一个结合三磷酸肌醇的细胞质氨基末端、六个形成离子孔的跨膜螺旋和一个短的细胞质羧基末端组成该基因突变与无汗症有关，提示由该蛋白介导的细胞内钙释放是分泌汗液所必需的[由RefSeq提供，2015年4月]
The protein encoded by this gene belongs to the inositol 1,4,5-triphosphate receptor family, whose members are second messenger intracellular calcium release channels. These proteins mediate a rise in cytoplasmic calcium in response to receptor activated production of inositol triphosphate. Inositol triphosphate receptor-mediated signaling is involved in many processes including cell migration, cell division, smooth muscle contraction, and neuronal signaling. This protein is a type 2 receptor that consists of a cytoplasmic amino-terminus that binds inositol triphosphate, six membrane-spanning helices that contribute to the ion pore, and a short cytoplasmic carboxy-terminus. A mutation in this gene has been associated with anhidrosis, suggesting that intracellular calcium release mediated by this protein is required for eccrine sweat production. [provided by RefSeq, Apr 2015]