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Cryo-EM structure of the protomers of the C ring in the CCW state
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details in silico model AlphaFold
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 8.154 f_angle_d 0.436 f_chiral_restr 0.038 f_plane_restr 0.003 f_bond_d 0.002
Sample C ring-containing flagellar motor-hook complex in the CCW state
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details Blot time: 2
Blot force: -5
Wait time: 5
Blot total: 1
Drain time: 2
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 667318 Reported Resolution (Å) 4 Resolution Method FSC 0.143 CUT-OFF Other Details C34 symmetry-expanded particles Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 Refinement Space REAL Refinement Protocol RIGID BODY FIT Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 (6k x 4k) Electron Dose (electrons/Å**2) 41
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1500 Maximum Defocus (nm) 1800 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 2.7 Imaging Mode BRIGHT FIELD Specimen Holder Model Nominal Magnification 81000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 4.1.1 CTF CORRECTION cryoSPARC 4.1.1 MODEL FITTING UCSF Chimera 1.17 MODEL FITTING UCSF ChimeraX 1.5 MODEL FITTING Coot 0.9.8.7 MODEL REFINEMENT PHENIX 1.20.1_4487: INITIAL EULER ASSIGNMENT cryoSPARC 4.1.1 FINAL EULER ASSIGNMENT cryoSPARC 4.1.1 RECONSTRUCTION cryoSPARC 4.1.1 IMAGE ACQUISITION EPU
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 19627 Particles were manually picked using cryoSPARC