ELECTRON MICROSCOPY

Sample

Active helical nitrilase complex

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument FEI VITROBOT MARK I
Cryogen Name ETHANE
Sample Vitrification Details The sample (2.5 ul) was applied to the grid and incubated for 30 seconds at 50% humidity before blotting and plunging.
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 33812
Reported Resolution (Å) 3.9
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol AB INITIO MODEL
Refinement Target Cross-correlation coefficient
Overall B Value ?
Fitting Procedure ?
Details Ab initio fitting was performed using Buccaneer, cleaned up with Coot and Phenix Real-Space Refine.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 45.5
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 750
Maximum Defocus (nm) 2000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification ?
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION EPU 1.9.1
CTF CORRECTION Gctf 1.06
MODEL REFINEMENT PHENIX 1.14
INITIAL EULER ASSIGNMENT RELION 2.0
FINAL EULER ASSIGNMENT RELION 2.0
CLASSIFICATION RELION 2.0
RECONSTRUCTION RELION 2.0
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?