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Cryo-EM structure of Clostridium perfringens pili CppA in complex with CppB
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 5XCC
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 2.4058 f_angle_d 0.3348 f_chiral_restr 0.0406 f_plane_restr 0.0017 f_bond_d 0.0013
Sample Covalent complex of Clostridium perfringens pili proteins CppB and CppA
Specimen Preparation 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 103291 Reported Resolution (Å) 3.2 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT
Map-Model Fitting and Refinement Id 1 (5XCC) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type FEI FALCON IV (4k x 4k) Electron Dose (electrons/Å**2) 50
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TALOS ARCTICA Minimum Defocus (nm) 800 Maximum Defocus (nm) 2000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS Imaging Mode BRIGHT FIELD Specimen Holder Model Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 200 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION crYOLO PARTICLE SELECTION Topaz IMAGE ACQUISITION EPU INITIAL EULER ASSIGNMENT cryoSPARC FINAL EULER ASSIGNMENT cryoSPARC RECONSTRUCTION cryoSPARC 4.4.1 MODEL REFINEMENT PHENIX 1.21_5207
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION