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- EMDB-6205: Structure of ADP-bound N-ethylmaleimide sensitive factor determin... -

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Basic information

Entry
Database: EMDB / ID: EMD-6205
TitleStructure of ADP-bound N-ethylmaleimide sensitive factor determined by single particle cryoelectron microscopy
Map data
SampleADP-bound N-ethylmaleimide sensitive factor:
N-ethylmaleimide sensitive factor
KeywordsATPases associated with diverse cellular activities
Function / homology
Function and homology information


SNARE complex disassembly / vesicle-fusing ATPase / positive regulation of receptor recycling / syntaxin-1 binding / ionotropic glutamate receptor binding / SNARE binding / potassium ion transport / PDZ domain binding / positive regulation of protein catabolic process / intracellular protein transport ...SNARE complex disassembly / vesicle-fusing ATPase / positive regulation of receptor recycling / syntaxin-1 binding / ionotropic glutamate receptor binding / SNARE binding / potassium ion transport / PDZ domain binding / positive regulation of protein catabolic process / intracellular protein transport / midbody / ATPase activity / protein-containing complex binding / protein kinase binding / ATP binding / identical protein binding / plasma membrane / metal ion binding / cytosol
Aspartate decarboxylase-like domain superfamily / P-loop containing nucleoside triphosphate hydrolase / CDC48, domain 2 / ATPase, AAA-type, conserved site / AAA ATPase, AAA+ lid domain / Vesicle-fusing ATPase / ATPase, AAA-type, core / AAA+ ATPase domain / CDC48, N-terminal subdomain / CDC48 domain 2-like superfamily
Vesicle-fusing ATPase
Biological speciesCricetulus griseus (Chinese hamster)
Methodsingle particle reconstruction / cryo EM / Resolution: 7.6 Å
AuthorsZhao M / Wu S / Zhou Q / Vivona S / Cipriano DJ / Cheng Y / Brunger AT
CitationJournal: Nature / Year: 2015
Title: Mechanistic insights into the recycling machine of the SNARE complex.
Authors: Minglei Zhao / Shenping Wu / Qiangjun Zhou / Sandro Vivona / Daniel J Cipriano / Yifan Cheng / Axel T Brunger /
Abstract: Evolutionarily conserved SNARE (soluble N-ethylmaleimide sensitive factor attachment protein receptors) proteins form a complex that drives membrane fusion in eukaryotes. The ATPase NSF (N- ...Evolutionarily conserved SNARE (soluble N-ethylmaleimide sensitive factor attachment protein receptors) proteins form a complex that drives membrane fusion in eukaryotes. The ATPase NSF (N-ethylmaleimide sensitive factor), together with SNAPs (soluble NSF attachment protein), disassembles the SNARE complex into its protein components, making individual SNAREs available for subsequent rounds of fusion. Here we report structures of ATP- and ADP-bound NSF, and the NSF/SNAP/SNARE (20S) supercomplex determined by single-particle electron cryomicroscopy at near-atomic to sub-nanometre resolution without imposing symmetry. Large, potentially force-generating, conformational differences exist between ATP- and ADP-bound NSF. The 20S supercomplex exhibits broken symmetry, transitioning from six-fold symmetry of the NSF ATPase domains to pseudo four-fold symmetry of the SNARE complex. SNAPs interact with the SNARE complex with an opposite structural twist, suggesting an unwinding mechanism. The interfaces between NSF, SNAPs, and SNAREs exhibit characteristic electrostatic patterns, suggesting how one NSF/SNAP species can act on many different SNARE complexes.
Validation ReportPDB-ID: 3j95

SummaryFull reportAbout validation report
History
DepositionDec 5, 2014-
Header (metadata) releaseJan 28, 2015-
Map releaseJan 28, 2015-
UpdateFeb 11, 2015-
Current statusFeb 11, 2015Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 6
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 6
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-3j95
  • Surface level: 6
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

Downloads & links

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Map

FileDownload / File: emd_6205.map.gz / Format: CCP4 / Size: 7.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
2.43 Å/pix.
x 128 pix.
= 311.194 Å
2.43 Å/pix.
x 128 pix.
= 311.194 Å
2.43 Å/pix.
x 128 pix.
= 311.194 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 2.4312 Å
Density
Contour LevelBy AUTHOR: 6.0 / Movie #1: 6
Minimum - Maximum-5.15959406 - 13.842989920000001
Average (Standard dev.)0.0 (±1.0)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-64-64-64
Dimensions128128128
Spacing128128128
CellA=B=C: 311.1936 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z2.4312031252.4312031252.431203125
M x/y/z128128128
origin x/y/z0.0000.0000.000
length x/y/z311.194311.194311.194
α/β/γ90.00090.00090.000
start NX/NY/NZ-72-72-72
NX/NY/NZ145145145
MAP C/R/S123
start NC/NR/NS-64-64-64
NC/NR/NS128128128
D min/max/mean-5.16013.843-0.000

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Supplemental data

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Supplemental map: EMD-6205 ADP NSF sharpened -479.map

FileEMD-6205_ADP_NSF_sharpened_-479.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Sample components

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Entire ADP-bound N-ethylmaleimide sensitive factor

EntireName: ADP-bound N-ethylmaleimide sensitive factor / Number of components: 1 / Oligomeric State: hexamer
MassTheoretical: 500 kDa

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Component #1: protein, N-ethylmaleimide sensitive factor

ProteinName: N-ethylmaleimide sensitive factor / a.k.a: NSF / Oligomeric Details: hexamer / Recombinant expression: Yes / Number of Copies: 6
MassTheoretical: 83 kDa
SourceSpecies: Cricetulus griseus (Chinese hamster)
Source (engineered)Expression System: Escherichia coli (E. coli) / Vector: pPROEX-1 / Strain: BL21(DE3)-RIL
External referencesUniProt: Vesicle-fusing ATPase

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Experimental details

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Sample preparation

SpecimenSpecimen state: Particle / Method: cryo EM
Sample solutionSpecimen conc.: 15 mg/mL
Buffer solution: 50 mM Tris-Cl, 150 mM NaCl, 1 mM EDTA, 1 mM ATP, 1 mM DTT, 0.05% v/v Nonident P-40
pH: 8
Support filmHoley carbon on top of 400 mesh copper grid
VitrificationInstrument: FEI VITROBOT MARK I / Cryogen name: ETHANE / Temperature: 90 K / Humidity: 100 % / Method: Blot for 3.5 seconds before plunging.

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Electron microscopy imaging

Experimental equipment
Model: Tecnai Polara / Image courtesy: FEI Company
ImagingMicroscope: FEI POLARA 300 / Date: Jan 14, 2014
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Electron dose: 44 e/Å2 / Illumination mode: FLOOD BEAM
LensMagnification: 31000 X (nominal) / Cs: 2.3 mm / Imaging mode: BRIGHT FIELD / Defocus: -1800 - -2800 nm
Specimen HolderModel: OTHER
CameraDetector: GATAN K2 (4k x 4k)

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Image acquisition

Image acquisitionDetails: Gatan K2 Summit in super-resolution counting mode. Motion correction as described in Li et al. (2013) Nature Methods.

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Image processing

ProcessingMethod: single particle reconstruction / Applied symmetry: C1 (asymmetric) / Number of projections: 12830
Details: 3D classification, refinement, and reconstruction were performed using RELION.
3D reconstructionSoftware: RELION / CTF correction: Each particle / Resolution: 7.6 Å / Resolution method: FSC 0.143, gold-standard

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Atomic model buiding

Modeling #1Software: Chimera, PHENIX / Refinement protocol: flexible / Target criteria: R-factor / Refinement space: RECIPROCAL
Details: D2 domain of NSF was from crystal structure 1NSF. D1 domain of NSF was from related entry EMD-6204.
Input PDB model: 1NSF
Chain ID: A
Output model

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