(myosin-light-chain) phosphatase

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In enzymology, a [myosin-light-chain] phosphatase (EC is an enzyme that catalyzes the chemical reaction

[myosin light-chain] phosphate + H2O [myosin light-chain] + phosphate

Thus, the two substrates of this enzyme are myosin light-chain phosphate and H2O, whereas its two products are [[[myosin light-chain]]] and phosphate.

This enzyme belongs to the family of hydrolases, specifically those acting on phosphoric monoester bonds. The systematic name of this enzyme class is [myosin-light-chain]-phosphate phosphohydrolase. Other names in common use include myosin light chain kinase phosphatase, myosin phosphatase, myosin phosphatase, protein phosphatase 2A, and myosin-light-chain-phosphatase.

Structural studies

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 1S70.


  • IUBMB entry for
  • BRENDA references for (Recommended.)
  • PubMed references for
  • PubMed Central references for
  • Google Scholar references for
  • Pato MD, Adelstein RS (1983). "Purification and characterization of a multisubunit phosphatase from turkey gizzard smooth muscle. The effect of calmodulin binding to myosin light chain kinase on dephosphorylation". J. Biol. Chem. 258: 7047&ndash, 54. PMID 6304072.

External links

The CAS registry number for this enzyme class is 86417-96-1.

Gene Ontology (GO) codes