light chain

(myosin-light-chain) phosphatase

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

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


  • Pato MD, Adelstein RS "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 7047–54.

External links

The CAS registry number for this enzyme class is .

Gene Ontology (GO) codes

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