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1918 H1N1 Viral influenza polymerase heterotrimer - Endonuclease and priming loop ordered (Class2a)
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 6.7174 f_angle_d 0.5423 f_chiral_restr 0.0378 f_plane_restr 0.0041 f_bond_d 0.0025
Sample 1918 Influenza virus polymerase heterotirmer in complex with vRNA promoters Sample Components 1918 Influenza virus polymerase vRNA promoters
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details 3.5 second blot and 3 microlitres sample.
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 144328 Reported Resolution (Å) 2.91 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 Refinement Protocol Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 61.5
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) Maximum Defocus (nm) 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 165000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 2.15 IMAGE ACQUISITION SerialEM 3.7 CTF CORRECTION cryoSPARC 2.15 INITIAL EULER ASSIGNMENT cryoSPARC 2.15 FINAL EULER ASSIGNMENT cryoSPARC 2.15 CLASSIFICATION cryoSPARC 2.15 RECONSTRUCTION cryoSPARC 2.15
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 2854501 Initial automated blob picking followed by template picking.