8C5I

ELECTRON MICROSCOPY

Sample

Active helical nitrilase homo-oligomer of cyanide dihydratase from Bacillus pumilus C1 variant (Q86R/H305K/H308K/H323K)

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details A 2.5 microlitre sample was applied onto a glow-discharged grid, blotted and plunged without incubation.
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 103000
Reported Resolution (Å) 3.15
Resolution Method FSC 0.5 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 ?
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 54
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 600
Maximum Defocus (nm) 3000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 130000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
CTF CORRECTION RELION 2.1
MODEL FITTING UCSF Chimera 1.15
RECONSTRUCTION RELION 2.1
MODEL REFINEMENT PHENIX 1.20.1-4487
MODEL REFINEMENT ISOLDE 1.1
MODEL REFINEMENT Coot 0.9.8.1
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING ONLY ?