PACSIN2, a 486aa phosphoprotein is a novel member of the PACSIN family of cytoplasmic adapter proteins. It is an isoform of PACSIN with a CDC15 N-terminal domain, a C-terminal SH3 domain, 3 conserved regions specific to the PACSIN family, and 3 asn-pro-phe (NPF) motifs, which potentially bind to EH domains. This protein is known to display a ubiquitous expression pattern with the highest levels of expression in brain. Reports suggest that PACSIN2 participates in the organization of the actin cytoskeleton, the regulation of vesicular traffic. It also participates in endocytic internalization and endocytic receptor recycling.