ELECTRON MICROSCOPY

Sample

ATP-bound N-ethylmaleimide sensitive factor

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK I
Cryogen Name ETHANE
Sample Vitrification Details Blot for 3.5 seconds before plunging into liquid ethane (FEI VITROBOT MARK I).
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 50781
Reported Resolution (Å) 4.2
Resolution Method FSC 0.143 CUT-OFF
Other Details Every image is the sum of 30 frames recorded using the K2 Summit. The final reconstruction was calculated from images summed from frames #2-#18. (Single particle details: 3D classification, refinement, and reconstruction were performed using RELION) (Single particle--Applied symmetry: C1)
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space RECIPROCAL
Refinement Protocol FLEXIBLE FIT
Refinement Target R-factor
Overall B Value ?
Fitting Procedure ?
Details REFINEMENT PROTOCOL--flexible DETAILS--D2 domain was from crystal structure 1NSF. D1 domain was built de novo.
Data Acquisition
Detector Type GATAN K2 (4k x 4k)
Electron Dose (electrons/Å2) 26.4
Imaging Experiment
Date of Experiment 2014-02-28
Temprature (Kelvin)
Microscope Model FEI POLARA 300
Minimum Defocus (nm) -1800
Maximum Defocus (nm) -2800
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.3
Imaging Mode BRIGHT FIELD
Specimen Holder Model OTHER
Nominal Magnification 31000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL FITTING PHENIX ?
MODEL FITTING UCSF Chimera ?
RECONSTRUCTION RELION ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. Each particle