Predicted to enable actin filament binding activity. Involved in several processes, including cytoskeleton organization; establishment of planar polarity of follicular epithelium; and platelet formation. Acts upstream of or within positive regulation of actin filament depolymerization; regulation of ventricular cardiac muscle cell membrane repolarization; and sarcomere organization. Located in myelin sheath. Is expressed in several structures, including genitourinary system; heart; pharynx mesenchyme; telencephalon; and trunk mesenchyme. Orthologous to human WDR1 (WD repeat domain 1). [provided by Alliance of Genome Resources, Apr 2022]