8PEU

ELECTRON MICROSCOPY

Sample

Complex of E. coli transcription termination factor Rho with the ATP analog, ATPgammaS and P4 polarity suppression protein Psu

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name NITROGEN
Sample Vitrification Details ?
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 73056
Reported Resolution (Å) 3.7
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 ?
Refinement Target Cross-correlation coefficient
Overall B Value ?
Fitting Procedure ?
Details Crystal structures of Rho (PDB ID: 1PV4) and Psu (PDB ID: 3RX6) were manually placed in the cryoEM reconstructions and each protomer was adjusted by rigid body fitting and segmental real-space refinement using Coot (version 0.9.6). The models were refined by iterative rounds of real space refinement in PHENIX (version 1.20_4459) and manual adjustment in Coot.
Data Acquisition
Detector Type FEI FALCON III (4k x 4k)
Electron Dose (electrons/Å2) 42
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 900
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
PARTICLE SELECTION cryoSPARC v3.2.0
IMAGE ACQUISITION EPU 2.9
CTF CORRECTION cryoSPARC v3.2.0
MODEL FITTING Coot 0.9.6
INITIAL EULER ASSIGNMENT cryoSPARC v3.2.0
FINAL EULER ASSIGNMENT cryoSPARC v3.3.0
CLASSIFICATION cryoSPARC v3.3.0
RECONSTRUCTION cryoSPARC v3.3.0
MODEL REFINEMENT PHENIX 1.20.4459
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?