8QQR

ELECTRON MICROSCOPY

Sample

Octameric assembly of inosine monophosphate dehydrogenase in complex with ATP+ppGpp

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details ?
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 27632
Reported Resolution (Å) 2.73
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target CC coefficient
Overall B Value 46.71
Fitting Procedure ?
Details Initial fitting was done in UCSF ChimeraX. Model refinement was done by iterative cycles of manual fitting with Coot and ISOLDE and automated fitting with phenix.real_space_refine.
Data Acquisition
Detector Type GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å2) 42
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS KRIOS
Minimum Defocus (nm) 300
Maximum Defocus (nm) 2300
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 165000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION SerialEM ?
MODEL FITTING UCSF ChimeraX 1.6.1
MODEL REFINEMENT PHENIX 1.20.1
MODEL REFINEMENT Coot 0.9.8 EL
MODEL REFINEMENT ISOLDE 1.4
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING ONLY ?