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Cryo-EM structure of the Type III-B Cmr-beta bound to cognate target RNA and AMPPnP, state 1, in the presence of ssDNA
Sample Type III-B Cmr-beta ternary complex, cognate target RNA and AMPPnP bound, in the presence of ssDNA Sample Components CRISPR-associated RAMP protein, Cmr4 family CRISPR-associated RAMP protein, Cmr6 family crRNA (49-MER) CRISPR-associated protein, Cmr5 family Cmr1,CRISPR-associated RAMP protein, Cmr1 family Cognate target RNA (43-MER) CRISPR-associated protein Cmrx CRISPR-associated protein, Cmr2 family CRISPR-associated protein, Cmr3 family
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details 3-4 s blotting before plunging
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 65610 Reported Resolution (Å) 3.07 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 Cross-correlation coefficient Overall B Value Fitting Procedure Details
Data Acquisition Detector Type FEI FALCON III (4k x 4k) Electron Dose (electrons/Å**2) 41
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1700 Maximum Defocus (nm) 2600 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 2.1 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 RELION 3.0 IMAGE ACQUISITION EPU CTF CORRECTION Gctf 1.06 MODEL FITTING UCSF Chimera MODEL FITTING Coot MODEL FITTING PHENIX MODEL REFINEMENT PHENIX INITIAL EULER ASSIGNMENT RELION 3.0 FINAL EULER ASSIGNMENT cisTEM 1.0 CLASSIFICATION cisTEM 1.0 RECONSTRUCTION cisTEM 1.0
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 429000