Enables protein phosphatase binding activity. Predicted to be involved in several processes, including actin cytoskeleton reorganization; excitatory chemical synaptic transmission; and positive regulation of stress fiber assembly. Predicted to be located in several cellular components, including dendritic spine; endosome lumen; and lamellipodium. Predicted to be part of filamentous actin. Predicted to be active in Z disc; adherens junction; and stress fiber. Is expressed in several structures, including alimentary system; central nervous system; embryo mesenchyme; genitourinary system; and sensory organ. Human ortholog(s) of this gene implicated in osteoporosis. Orthologous to human PDLIM4 (PDZ and LIM domain 4). [provided by Alliance of Genome Resources, Apr 2022]