IUBMB Enzyme Nomenclature

EC 3.1.3.4

Accepted name: phosphatidate phosphatase

Reaction: a 1,2-diacylglycerol 3-phosphate + H2O = a 1,2-diacyl-sn-glycerol + phosphate

Glossary: a 1,2-diacylglycerol 3-phosphate = a 3-sn-phosphatidate a 1,2-diacyl-sn-glycerol = DAG

Other name(s): phosphatic acid phosphatase; acid phosphatidyl phosphatase; phosphatic acid phosphohydrolase; PAP, Lipin

Systematic name: diacylglycerol-3-phosphate phosphohydrolase

Comments: This enzyme catalyses the Mg2+-dependent dephosphorylation of a 1,2-diacylglycerol-3-phosphate, yielding a 1,2-diacyl-sn-glycerol (DAG), the substrate for de novo lipid synthesis via the Kennedy pathway and for the synthesis of triacylglycerol. In lipid signalling, the enzyme generates a pool of DAG to be used for protein kinase C activation. The mammalian enzymes are known as lipins.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 9025-77-8

References:

1. Smith, S.W., Weiss, S.B. and Kennedy, E.P. The enzymatic dephosphorylation of phosphatidic acids. J. Biol. Chem. 228 (1957) 915-922. [PMID: 13475370]

2. Carman, G.M. and Han, G.S. Phosphatidic acid phosphatase, a key enzyme in the regulation of lipid synthesis. J. Biol. Chem. 284 (2009) 2593-2597. [PMID: 18812320]

[EC 3.1.3.4 created 1961, modified 2010]


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