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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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ZIP kinase identified as a novel myosin regulatory light chain kinase in HeLa cells.

A novel myosin light chain kinase (MLCK) cDNA was isolated from a HeLa cell cDNA library. The deduced amino acid sequence was identical to that of a zipper-interacting protein kinase (ZIPK) which mediates apoptosis [Kawai et al. (1998) Mol. Cell. Biol. 18, 1642-1651]. Here we found that HeLa ZIPK phosphorylated the regulatory light chain of myosin II (MRLC) at both serine 19 and threonine 18 in a Ca2+/calmodulin independent manner. Phosphorylation of myosin II by HeLa ZIPK resulted in activation of actin- activated MgATPase activity of myosin II. HeLa ZIPK is the first non-muscle MLCK that phosphorylates MRLC at two sites.[1]

References

  1. ZIP kinase identified as a novel myosin regulatory light chain kinase in HeLa cells. Murata-Hori, M., Suizu, F., Iwasaki, T., Kikuchi, A., Hosoya, H. FEBS Lett. (1999) [Pubmed]
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