In eukaryotes, the phosphorylation and dephosphorylation of proteins on serine and threonine residues is an essential means of regulating a broad range of cellular functions, including division, homeostasis and apoptosis. A group of proteins that are intimately involved in this process are the protein phosphatases. In general, the protein phosphatase (PP) holoenzyme is a trimeric complex composed of a regulatory subunit, a variable subunit and a catalytic subunit. Four major families of protein phosphatase catalytic subunits have been identified, designated PP1, PP2A, PP2B (calcineurin) and PP2C. The PP2A family comprises subfamily members PP2A alpha and PP2A beta. An additional protein phosphatase catalytic subunit, PPX (also known as PP4) is a putative member of a novel PP family.
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Protein Aliases: B55-GAMMA; IMYPNO; Methyl-PPP2CA; MGC33570; PP2A alpha; PP2A C terminal; PP2A L9; PP2A Leucine 9; PP2A-alpha; PR52; PR55G; protein phosphatase 2 (formerly 2A), catalytic subunit, alpha isoform; protein phosphatase 2, catalytic subunit, alpha isoform; protein phosphatase 2, catalytic subunit, alpha isozyme; protein phosphatase 2a, catalytic subunit, alpha isoform; protein phosphatase-2A-alpha; Replication protein C; RP-C; serine/threonine protein phosphatase 2A, catalytic subunit, alpha isoform; Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoform
Gene Aliases: PP2A; Pp2a1; PP2Ac; PP2CA; PP2Calpha; PPP2CA; R75353; RP-C