Abstract
N-Ethylmaleimide sensitive factor (NSF) and p97/valosin-containing protein (VCP) are distantly related members of the ATPases associated with a variety of cellular activities (AAA) family of proteins. While both proteins have been implied in cellular morphology changes involving membrane compartments or vesicles, more recent evidence seems to imply that NSF is primarily involved in the soluble NSF attachment receptor (SNARE)-mediated vesicle fusion by disassembling the SNARE complex whereas p97/VCP is primarily involved in the extraction of membrane proteins. These functional differences are now corroborated by major structural differences based on recent crystallographic and cryo-electron microscopy studies. This review discusses these recent findings.
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