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Cas nuclease-CRISPR (cr)RNA ribonucleoprotein (RNP) complex
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 6DTD
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 13.9917 f_angle_d 0.4044 f_chiral_restr 0.0328 f_plane_restr 0.0029 f_bond_d 0.0018
Sample Cas13b (cr)RNA complex
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 356629 Reported Resolution (Å) 3.09 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT
Map-Model Fitting and Refinement Id 1 (6DTD) Refinement Space Refinement Protocol Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type TFS FALCON 4i (4k x 4k) Electron Dose (electrons/Å**2) 40
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS GLACIOS Minimum Defocus (nm) 600 Maximum Defocus (nm) 2000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 2.7 Imaging Mode BRIGHT FIELD Specimen Holder Model Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 200 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC v4.4.0 IMAGE ACQUISITION EPU 3.3.1.5184 CTF CORRECTION cryoSPARC v4.4.0 MODEL FITTING UCSF ChimeraX 1.71 MODEL FITTING Coot 0.9.6 MODEL REFINEMENT PHENIX 1.21_5207 INITIAL EULER ASSIGNMENT cryoSPARC v4.4.0 FINAL EULER ASSIGNMENT cryoSPARC v4.4.0 RECONSTRUCTION cryoSPARC v4.4.0
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION