Involved in plasma membrane dynamics and cell process formation. Isoform 1 and isoform 2 are necessary for axonal and dendritic filopodia induction, for dendritic spine maturation and synapse formation in a palmitoylation-dependent manner (By similarity). Interacts with dopamine receptor DRD3. Expressed in the lens (at protein level). Highly expressed in forebrain and cerebellum with lower expression in adrenal gland and heart. Expression weak or undetectable in other tissues. Phosphorylated. Belongs to the paralemmin family.