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Cryo-EM structure of Cas12k-sgRNA binary complex (type V-K CRISPR-associated transposon)
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 15.855 f_angle_d 0.61 f_chiral_restr 0.034 f_plane_restr 0.005 f_bond_d 0.004
Sample Binary complex of ShCas12k bound to sgRNA.
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details 3 s blotting, 4 degrees celcius
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 180258 Reported Resolution (Å) 2.87 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 REAL Refinement Protocol AB INITIO MODEL Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type FEI FALCON III (4k x 4k) Electron Dose (electrons/Å**2) 40
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) 700 Maximum Defocus (nm) 2300 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 96000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 3.2.0 IMAGE ACQUISITION EPU CTF CORRECTION cryoSPARC 3.2.0 MODEL FITTING UCSF ChimeraX MODEL FITTING Coot 0.9.6 MODEL REFINEMENT PHENIX INITIAL EULER ASSIGNMENT cryoSPARC 3.2.0 FINAL EULER ASSIGNMENT cryoSPARC 3.3.1 CLASSIFICATION cryoSPARC 3.3.1 RECONSTRUCTION cryoSPARC 3.3.1
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 2228644