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Cryo-EM structure of the undecorated actin filament in the ADP-Pi state.
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 8OI8
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 11.9949 f_angle_d 0.5594 f_chiral_restr 0.0461 f_bond_d 0.0042 f_plane_restr 0.0039
Sample Beta-actin filament.
Specimen Preparation Sample Aggregation State FILAMENT Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE-PROPANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 4674353 Reported Resolution (Å) 2.18 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 (8OI8) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value Fitting Procedure Details Phenix real space refinement.
Data Acquisition Detector Type GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 68.4
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) 1200 Maximum Defocus (nm) 2700 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 0.01 Imaging Mode BRIGHT FIELD Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER Nominal Magnification 105000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 4.4 IMAGE ACQUISITION EPU CTF CORRECTION cryoSPARC 4.4 MODEL FITTING Coot 0.9.8.1 MODEL FITTING UCSF ChimeraX 1.8 INITIAL EULER ASSIGNMENT cryoSPARC 4.4 FINAL EULER ASSIGNMENT cryoSPARC 4.4 CLASSIFICATION cryoSPARC 4.4 RECONSTRUCTION cryoSPARC 4.4 MODEL REFINEMENT PHENIX 1.21rc1_5015
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION Patch CTF 9946495