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Cryo-EM structure of Bacillus megaterium gas vesicles
Sample Helical assembly of GvpB monomers forming the gas vesicle wall
Specimen Preparation Sample Aggregation State HELICAL ARRAY Vitrification Instrument LEICA PLUNGER Cryogen Name ETHANE Sample Vitrification Details Blot times between 5 and 11 seconds.
3D Reconstruction Reconstruction Method HELICAL Number of Particles 1460 Reported Resolution (Å) 3.2 Resolution Method FSC 0.143 CUT-OFF Other Details Final reconstruction in cryoSPARC 3.3 using local refinement in a small section of the cylinder Refinement Type Symmetry Type HELICAL Axial Symmetry C1 Axial Rise 0.525 Angular Rotation -3.874
Map-Model Fitting and Refinement Id 1 Refinement Space REAL Refinement Protocol AB INITIO MODEL Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 30
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 250 Maximum Defocus (nm) 1250 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 64000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION RELION 3.1 CTF CORRECTION RELION 3.1 FINAL EULER ASSIGNMENT cryoSPARC 3.3 CLASSIFICATION RELION 3.1 RECONSTRUCTION cryoSPARC 3.3 MODEL REFINEMENT PHENIX 1.13 MODEL REFINEMENT ISOLDE
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 36295