Enables phospholipid binding activity. Involved in several processes, including plasma membrane tubulation; positive regulation of dendrite development; and regulation of postsynaptic neurotransmitter receptor internalization. Located in axon terminus; perinuclear region of cytoplasm; and plasma membrane. Is active in glutamatergic synapse and postsynaptic density membrane. Orthologous to human PACSIN1 (protein kinase C and casein kinase substrate in neurons 1). [provided by Alliance of Genome Resources, Apr 2022]