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Nat Struct Mol Biol. 2012 Feb 5;19(3):268-75. doi: 10.1038/nsmb.2237.

Structural characterization of full-length NSF and 20S particles.

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  • 1State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsinghua University, Beijing, China.

Abstract

The 20S particle, which is composed of the N-ethylmaleimide-sensitive factor (NSF), soluble NSF attachment proteins (SNAPs) and the SNAP receptor (SNARE) complex, has an essential role in intracellular vesicle fusion events. Using single-particle cryo-EM and negative stain EM, we reconstructed four related three-dimensional structures: Chinese hamster NSF hexamer in the ATPĪ³S, ADP-AlFx and ADP states, and the 20S particle. These structures reveal a parallel arrangement between the D1 and D2 domains of the hexameric NSF and characterize the nucleotide-dependent conformational changes in NSF. The structure of the 20S particle shows that it holds the SNARE complex at two interaction interfaces around the C terminus and N-terminal half of the SNARE complex, respectively. These findings provide insight into the molecular mechanism underlying disassembly of the SNARE complex by NSF.

PMID:
22307055
[PubMed - indexed for MEDLINE]
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