☰ Navigation Tabs
Cryo-EM informed directed evolution of Nitrilase 4 leads to a change in quaternary structure.
Sample Active helical nitrilase complex
Specimen Preparation Sample Aggregation State FILAMENT Vitrification Instrument FEI VITROBOT MARK I Cryogen Name ETHANE Sample Vitrification Details The sample (2.5 ul) was applied to the grid and incubated for 30 seconds at 50% humidity before blotting and plunging.
3D Reconstruction Reconstruction Method HELICAL Number of Particles 133106 Reported Resolution (Å) 3.4 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type HELICAL Axial Symmetry C1 Axial Rise 17.48 Angular Rotation -72.98
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 Ab initio fitting was performed using Buccaneer, cleaned up with Coot and Phenix Real-Space Refine.
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 45.5
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 750 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 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version IMAGE ACQUISITION EPU 1.9.1 CTF CORRECTION Gctf 1.06 INITIAL EULER ASSIGNMENT RELION 2.0 FINAL EULER ASSIGNMENT RELION 2.0 CLASSIFICATION RELION 2.0 RECONSTRUCTION RELION 2.0 MODEL REFINEMENT PHENIX 1.14
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 392263