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Cryo-EM structure of human Dicer and its complexes with a pre-miRNA substrate
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 4GL2 experimental model PDB 2KOU experimental model PDB 5B16 experimental model PDB 3C4T
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 8.537 f_angle_d 1.583 f_chiral_restr 0.073 f_plane_restr 0.01 f_bond_d 0.009
Sample Dicer and trbp Sample Components Human Dicer and TRBP 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 337566 Reported Resolution (Å) 4.4 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 (4GL2, 2KOU, 5B16, 3C4T) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target CC Overall B Value 100 Fitting Procedure Details
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 50
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 2500 Maximum Defocus (nm) 3500 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 22500 Calibrated Magnification 38462 Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION RELION 2.1 CTF CORRECTION CTFFIND 4.1.8 MODEL FITTING UCSF Chimera 1.10 MODEL REFINEMENT PHENIX 1.11 INITIAL EULER ASSIGNMENT RELION 2.1 FINAL EULER ASSIGNMENT RELION 2.1 CLASSIFICATION RELION 2.1 RECONSTRUCTION RELION 2.1
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION