There are 3 isoforms of the nonmuscle myosin heavy chain (NMHC), II-A, II-B and II-C. In addition there are four alternatively spliced isoforms of NMHC II-B and II-C. The function of nonmuscle myosin II-C and its isoforms remains unclear. We are expressing the different full length isoforms of nonmuscle myosin II-C (II-C0, NMHC II-C1, and NMHC-II-C2 and NMHC II-C1,C2) in vitro using the baculovirus expression system in order to characterize the full length molecules. In addition we are expressing a mutant II-C isoform known to occur in humans and to cause deafness. We are also generating II-C-GFP transgenic mice, to localize expression of NM II-C in mice in vivo. These experiments will help us understand the function of II-C in both mice and humans.

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National Heart, Lung, and Blood Institute
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Yang, Fang; Wei, Qize; Adelstein, Robert S et al. (2012) Non-muscle myosin IIB is essential for cytokinesis during male meiotic cell divisions. Dev Biol 369:356-61
Wang, Aibing; Ma, Xuefei; Conti, Mary Anne et al. (2011) Distinct and redundant roles of the non-muscle myosin II isoforms and functional domains. Biochem Soc Trans 39:1131-5
Jana, Siddhartha S; Kim, Kye-Young; Mao, Jian et al. (2009) An alternatively spliced isoform of non-muscle myosin II-C is not regulated by myosin light chain phosphorylation. J Biol Chem 284:11563-71