encodes a class II non-muscle myosin heavy chain related to Drosophila zipper, which plays a role in several aspects of embryonic morphogenesis; in C. elegans, NMY-1 is required for embryonic elongation and establishment of normal body morphology; however, nmy-1
functions redundantly with another non-muscle myosin heavy chain gene, nmy-2
, during elongation and establishment of normal body morphology; mutations in nmy-1
suppress the hypercontraction phenotype produced by mutations in mel-11
, a myosin phosphatase that regulates actomyosin filament contraction; in addition, NMY-1 may partner with MLC-4, myosin light chain 4, during elongation; NMY-1 expression is detected during embryogenesis, particularly at the onset of elongation.