Predicted to enable actin filament binding activity. Predicted to be involved in actin filament organization and muscle contraction. Predicted to be active in actin filament. Is expressed in cardiovascular system; cephalic musculature; epiphysis; and otic vesicle. Human ortholog(s) of this gene implicated in blood platelet disease. Orthologous to human TPM4 (tropomyosin 4).