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CryoEM structure of Lumazine synthase composed of 60 identical subunits
Specimen Preparation
Sample Aggregation State
PARTICLE
Vitrification Instrument
FEI VITROBOT MARK I
Cryogen Name
ETHANE
Sample Vitrification Details
The purified protein was applied to the glow discharged grids inside the chamber, blotted for a duration of 1.5 s, and then plunge-frozen in liquid et ...
The purified protein was applied to the glow discharged grids inside the chamber, blotted for a duration of 1.5 s, and then plunge-frozen in liquid ethane cooled by liquid nitrogen.
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
103328
Reported Resolution (Å)
2.33
Resolution Method
FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type
POINT
Point Symmetry
I
Map-Model Fitting and Refinement
Id
1
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector Type
GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)
70
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
FEI TITAN KRIOS
Minimum Defocus (nm)
200
Maximum Defocus (nm)
1200
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
EM Software
Task
Software Package
Version
MODEL REFINEMENT
PHENIX
RECONSTRUCTION
RELION
Image Processing
CTF Correction Type
CTF Correction Details
Number of Particles Selected
Particle Selection Details
NONE
344110
particles were selected by LoG picking from 1516 micrographs