Background：

The protein encoded by this gene is one of the three catalytic subunits of protein phosphatase 1. PP1 is a serine/threonine specific protein phosphatase known to be involved in the regulation of a variety of cellular processes， such as cell division， glycogen metabolism， muscle contractility， protein synthesis， and HIV-1 viral transcription. Mouse studies suggest that PP1 functions as a suppressor of learning and memory. Two alternatively spliced transcript variants encoding distinct isoforms have been observed.