Is an ortholog of human PPP1R9A (protein phosphatase 1 regulatory subunit 9A). Is predicted to have actin filament binding activity. Is involved in synapse assembly. Localizes to the cytoskeleton\; presynaptic active zone\; and presynaptic periactive zone. Is expressed in the excretory canal\; the hypodermis\; the nervous system\; and the reproductive system.