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Cryo-EM structure of the Pre3-1 20S proteasome core particle
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 4G4S
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 4.892 f_angle_d 0.501 f_chiral_restr 0.056 f_bond_d 0.004 f_plane_restr 0.004
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 216361 Reported Resolution (Å) 2.74 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C2
Map-Model Fitting and Refinement Id 1 (4G4S) Refinement Space REAL Refinement Protocol AB INITIO MODEL Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 55.94
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) Maximum Defocus (nm) 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 81000 Calibrated Magnification 47169 Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION crYOLO 1.6.1 IMAGE ACQUISITION SerialEM 3.8.0 CTF CORRECTION CTFFIND 4.1.13 MODEL FITTING Coot 0.9.3 MODEL FITTING ISOLDE 1.0b4.dev0 MODEL FITTING UCSF Chimera 1.15 CLASSIFICATION cryoSPARC 2.15.0 RECONSTRUCTION cryoSPARC 2.15.0 MODEL REFINEMENT PHENIX 1.19.1-4122
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 1633892