Nonmuscle myosin appears to be responsible for cellularization. Required for morphogenesis and cytokinesis (PubMed:24786584). Necessary for auditory transduction: plays a role in Johnston's organ organization by acting in scolopidial apical attachment (PubMed:27331610). Interaction with the myosin ck may be important for this function (PubMed:27331610). Interacts with sau (PubMed:24786584). Interacts with ck and Ubr3 (PubMed:27331610). Expression in neurons and scolopale cells is increased at the apical tips of cilia (PubMed:27331610). During embryo cellularization, located in foci at the edges of the furrow canal tips (PubMed:33835025). In Johnston's organ, expressed in neurons and scolopale cells. At germband retraction (stage 12), expression is high in the embryo amnioserosa and relatively low at the apical edge of the leading edge/ dorsalmost epidermal (DME) cells (PubMed:18816840, PubMed:23579691). Whereas at dorsal closure (stage 13), expression is relatively low in the amnioserosa and high in the DME cells (PubMed:18816840, PubMed:23579691). Isoforms containing exon 7 are detected in all stages of development and are expressed in embryos, early and late larvae, and adults (PubMed:8568878). Ubiquitinated. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Myosin family.