Enables 14-3-3 protein binding activity and muscle alpha-actinin binding activity. Predicted to be involved in several processes, including chaperone-mediated autophagy; positive regulation of actin filament bundle assembly; and regulation of Rho-dependent protein serine/threonine kinase activity. Located in nucleus. Is expressed in genitourinary system. Orthologous to human SYNPO2 (synaptopodin 2).