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Cryo-EM structure of the human CENP-A-H4 octasome.
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 7X57
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 26.416 f_angle_d 0.624 f_chiral_restr 0.037 f_plane_restr 0.005 f_bond_d 0.004
Sample Cryo-EM structure of human subnucleosome Sample Components Histone H3-like centromeric protein A,Histone H4 Widom601 DNA FW (145-MER),Widom601 DNA RW (145-MER)
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 120247 Reported Resolution (Å) 3.66 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT
Map-Model Fitting and Refinement Id 1 (7X57) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 57.3
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) 1250 Maximum Defocus (nm) 2500 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 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version IMAGE ACQUISITION SerialEM MODEL REFINEMENT PHENIX
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION