Enables DNA-binding transcription factor activity; actin binding activity; and transcription coactivator activity. Acts upstream of or within several processes, including animal organ development; generation of neurons; and smooth muscle cell differentiation. Located in cytoplasm. Is expressed in cardiovascular system; genitourinary system; liver; septum transversum; and yolk sac. Orthologous to human MRTFB (myocardin related transcription factor B). [provided by Alliance of Genome Resources, Apr 2022]