part of endosome membrane ESCRT complex membrane protein complex ATPase complex ESCRT IV complex Vta1-Vps4 complex pr VPS4A/B complex Vps4-Vta1 complex 2015-01-29T10:02:30Z Vps4 complex cellular_component VPS4A-VPS4B ESCRT-IV An ESCRT complex that has AAA-ATPase activity and is involved in ESCRT-mediated intralumenal vesicle formation and the final stages of cytokinesis. The complex catalyzes disassembly of the ESCRT III filament around the neck of the budding vesicle in an ATP-driven reaction, resulting in membrane scission and recycling of the ESCRT III components back to the cytosol. In yeast, it is formed by the AAA ATPase Vps4 and its cofactor Vta1. GO:1990621 vacuolar protein sorting-associated complex