Myosin light chain kinase

From Proteopedia

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Template:STRUCTURE 2x4f

Contents 1 Function 2 Disease 3 3D structures of MLCK 4 References

Function

Myosin light chain kinase (MLCK) phosphorylates the regulatory light chain of myosin at serine residue 19. This phosphorylation enables the myosin crossbridge to bind to the actin filament and allows muscle contraction to begin. Dephosphorylation of the myosin light chain stops muscle contraction^[1].

Disease

A variant of MLCK is associated with severe asthma in Africa Americans^[2].

3D structures of MLCK

2cqv – hMLCK 8th Ig-like domain – human – NMR
2yr3 - hMLCK 4th Ig-like domain – NMR
2x4f – hMLCK residues 40-388

References

1. ↑ Stull JT, Tansey MG, Tang DC, Word RA, Kamm KE. Phosphorylation of myosin light chain kinase: a cellular mechanism for Ca2+ desensitization. Mol Cell Biochem. 1993 Nov;127-128:229-37. PMID:7935354
2. ↑ Flores C, Ma SF, Maresso K, Ober C, Garcia JG. A variant of the myosin light chain kinase gene is associated with severe asthma in African Americans. Genet Epidemiol. 2007 May;31(4):296-305. PMID:17266121 doi:http://dx.doi.org/10.1002/gepi.20210