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Cas9 bound to cognate DNA, Streptococcus thermophilus DGCC 7710 CRISPR3 system
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details in silico model AlphaFold
Sample Complex of Cas9 bound to crRNA:tracrRNA and to a cognate DNA duplex Sample Components CRISPR-associated endonuclease Cas9 crRNA, chain B and tracrRNA, chain C DNA oligoduplex, target strand, chains D,E and DNA oligoduplex, non-target strand, chain F
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 119790 Reported Resolution (Å) 3.24 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 Refinement Space Refinement Protocol Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type FEI FALCON III (4k x 4k) Electron Dose (electrons/Å**2) 30
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS GLACIOS Minimum Defocus (nm) 1000 Maximum Defocus (nm) 2000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 2.7 Imaging Mode OTHER Specimen Holder Model Nominal Magnification 92000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 200 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 4.0.3 IMAGE ACQUISITION EPU 3.0 CTF CORRECTION cryoSPARC 4.0.3 MODEL FITTING UCSF ChimeraX 1.3 MODEL FITTING Coot 0.9.8.1 RECONSTRUCTION cryoSPARC 4.1.1 MODEL REFINEMENT PHENIX 1.21rc1_4903
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details NONE 894269 Blob picking in cryoSPARC live session