Helical structures of ESCRT-III are disassembled by VPS4

S Lata, G Schoehn, A Jain, R Pires, J Piehler, H.G Göttlinger, W Weissenhorn

Research output: Contribution to journalArticle (Academic Journal)peer-review

227 Citations (Scopus)

Abstract

During intracellular membrane trafficking and remodeling, protein complexes known as the ESCRTs (endosomal sorting complexes required for transport) interact with membranes and are required for budding processes directed away from the cytosol, including the budding of intralumenal vesicles to form multivesicular bodies; for the budding of some enveloped viruses; and for daughter cell scission in cytokinesis. We found that the ESCRT-III proteins CHMP2A and CHMP3 (charged multivesicular body proteins 2A and 3) could assemble in vitro into helical tubular structures that expose their membrane interaction sites on the outside of the tubule, whereas the AAA-type adenosine triphosphatase VPS4 could bind on the inside of the tubule and disassemble the tubes upon adenosine triphosphate hydrolysis. CHMP2A and CHMP3 copolymerized in solution, and their membrane targeting was cooperatively enhanced on planar lipid bilayers. Such helical CHMP structures could thus assemble within the neck of an inwardly budding vesicle, catalyzing late steps in budding under the control of VPS4.
Translated title of the contributionHelical structures of ESCRT-III are disassembled by VPS4
Original languageEnglish
Pages (from-to)1354 - 1357
Number of pages5
JournalScience
Volume321
Issue number5894
DOIs
Publication statusPublished - Sep 2008

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