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CryoEM structure of EcKatG S-Trp105 at 2.22 Angstrom resolution revealing an asymmetric sulfur center in O=S-Trp
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 7JZ6
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 6.649 f_angle_d 0.59 f_chiral_restr 0.042 f_plane_restr 0.004 f_bond_d 0.003
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details 3 microliter of the sample was applied to each grid and blotted for 3 s
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 884126 Reported Resolution (Å) 2.22 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry D4
Map-Model Fitting and Refinement Id 1 (7JZ6) Refinement Space REAL Refinement Protocol AB INITIO MODEL Refinement Target Overall B Value 7.92 Fitting Procedure Details
Data Acquisition Detector Type TFS FALCON 4i (4k x 4k) Electron Dose (electrons/Å**2) 50
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) 1000 Maximum Defocus (nm) 2000 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 PARTICLE SELECTION cryoSPARC 4.5.3 CTF CORRECTION cryoSPARC 4.5.3 MODEL FITTING PHENIX 2.0rc1_5599 MODEL REFINEMENT PHENIX 2.0rc1_5599 INITIAL EULER ASSIGNMENT cryoSPARC 4.5.3 FINAL EULER ASSIGNMENT cryoSPARC 4.5.3 CLASSIFICATION cryoSPARC 4.5.3 RECONSTRUCTION cryoSPARC 4.5.3
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 7762366 Particles were selected from blob picking.