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Cryo-EM structure of activated retron Eco2 (Ec67)
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details in silico model AlphaFold experimental model Other D_1292144007
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 18.759 f_angle_d 0.544 f_chiral_restr 0.037 f_plane_restr 0.005 f_bond_d 0.003
Sample Ternary complex of activated retron Eco2 (Ec67) with RNA and DNA
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 617364 Reported Resolution (Å) 2.9 Resolution Method FSC 0.143 CUT-OFF Other Details Symmetry expanded particles were used 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) 29
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 BRIGHT FIELD Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER Nominal Magnification 92000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 200 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 4.7 MODEL REFINEMENT PHENIX 1.21.2_5419 IMAGE ACQUISITION EPU 3.10 RECONSTRUCTION cryoSPARC 4.7
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 2271864 Template picking