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Cryo-EM structure of SpCas9-sgRNA-DNA ternary complex
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 4OO8
Sample SpCas9-sgRNA-target DNA complex Sample Components SpCas9 single-guide RNA Target DNA
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details blot for 4 seconds before pluging
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 57484 Reported Resolution (Å) 5.2 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 (4OO8) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Correlation coefficient Overall B Value 80 Fitting Procedure Details
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 10
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1300 Maximum Defocus (nm) Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS Imaging Mode BRIGHT FIELD Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER Nominal Magnification Calibrated Magnification 18000 Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION RELION 1.3 IMAGE ACQUISITION RELION 1.3 CTF CORRECTION CTFFIND3 3.0 MODEL FITTING NAMD 2.10 MODEL REFINEMENT Rosetta 3.5 INITIAL EULER ASSIGNMENT RELION 1.3 FINAL EULER ASSIGNMENT RELION 1.3 CLASSIFICATION RELION 1.3 RECONSTRUCTION RELION 1.3
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING ONLY 66845