Enables alpha-tubulin binding activity and ubiquitin protein ligase binding activity. Involved in several processes, including Arp2/3 complex-mediated actin nucleation; endosomal transport; and positive regulation of pseudopodium assembly. Located in several cellular components, including endosome; exocyst; and lamellipodium. Part of WASH complex. [provided by Alliance of Genome Resources, Jul 2025]