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PP1C binding domain found in protein phosphatase 1 regulatory subunit 3A (PPP1R3A) and similar proteins PPP1R3A, also called protein phosphatase 1 glycogen-associated regulatory subunit (PP1G), protein phosphatase type-1 glycogen targeting subunit, or RG1, acts as a glycogen-targeting subunit for PP1 that is essential for cell division, and participates in the regulation of glycogen metabolism, muscle contractility, and protein synthesis. PPP1R3A plays an important role in glycogen synthesis but is not essential for insulin activation of glycogen synthase. It interacts with the PPP1CC catalytic subunit of PP1 and associates with glycogen. This model corresponds to the protein phosphatase 1 catalytic subunit (PP1C) binding domain of PPP1R3A, which contains a RVxF PP1C-binding motif that mediates interactions with PP1C.
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