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cryo-EM structure of the Cas9-sgRNA-AcrIIA4 anti-CRISPR complex
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 12.125 f_angle_d 0.927 f_chiral_restr 0.05 f_bond_d 0.006 f_plane_restr 0.006
Sample the complex of Streptococcus progenies Cas9 with sgRNA and AcrIIA4 Sample Components Streptococcus pyogenes M1 GAS unidentified phage
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details blot for 4.5 seconds with force of 12 before plunging
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 185000 Reported Resolution (Å) 3.9 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT
Map-Model Fitting and Refinement Id 1 2 Refinement Space REAL REAL Refinement Protocol AB INITIO MODEL RIGID BODY FIT Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 46
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1000 Maximum Defocus (nm) 3000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 0.01 Imaging Mode BRIGHT FIELD Specimen Holder Model Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version CTF CORRECTION RELION 2.0 FINAL EULER ASSIGNMENT RELION 2.0 MODEL REFINEMENT PHENIX
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION