The Bin/Amphiphysin/Rvs (BAR) domain of the plant protein SCARFACE (SFC)
BAR domains are dimerization, lipid binding and curvature sensing modules found in many different proteins with diverse functions including organelle biogenesis, membrane trafficking or remodeling, and cell division and migration. The plant protein SCARFACE (SFC), also called VAscular Network 3 (VAN3), is a plant ACAP (ArfGAP with Coiled-coil, ANK repeat and PH domain containing protein), an Arf GTPase Activating Protein (GAP) that plays a role in the trafficking of auxin efflux regulators from the plasma membrane to the endosome. It is required for the normal vein patterning in leaves. SCF contains an N-terminal BAR domain, followed by a Pleckstrin Homology (PH) domain, an Arf GAP domain, and C-terminal ankyrin (ANK) repeats. BAR domains form dimers that bind to membranes, induce membrane bending and curvature, and may also be involved in protein-protein interactions.