Enables actin filament binding activity. Involved in several processes, including cholesterol homeostasis; intestinal cholesterol absorption; and ruffle organization. Located in actin cytoskeleton; brush border membrane; and ruffle. Is expressed in several structures, including alimentary system; brain; genitourinary system; immune system; and respiratory system. Orthologous to human LIMA1 (LIM domain and actin binding 1). [provided by Alliance of Genome Resources, Apr 2022]