Bridging integrator 3 is a protein that in humans is encoded by the BIN3 gene.The product of this gene is a member of the BAR domain protein family. The encoded protein is comprised solely of a BAR domain which is predicted to form coiled-coil structures and proposed to mediate dimerization, sense and induce membrane curvature, and bind small GTPases. BAR domain proteins have been implicated in endocytosis, intracellular transport, and a diverse set of other processes. [provided by RefSeq].
Involved in cytokinesis and septation where it has a role in the localization of F-actin