ELECTRON MICROSCOPY

Sample

Outer membrane complex of OmpC-MlaA with periplasmic MlaC reconstituted in MSP2N2 nanodiscs

Specimen Preperation
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 205487
Reported Resolution (Å) 2.93
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target Cross-correlation coefficient
Overall B Value 88
Fitting Procedure ?
Details Building of the high-resolution structures of OmpC-MlaA was done via approximate fitting using the OmpC-MlaA crystal structure (PDB 5NUP) as rigid bodies into the density in Chimera, followed by refinement in COOT.
Data Acquisition
Detector Type GATAN K3 (6k x 4k)
Electron Dose (electrons/Å2) 90
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 800
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 105000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC 4.0.0
IMAGE ACQUISITION SerialEM ?
CTF CORRECTION cryoSPARC 4.0.0
MODEL FITTING UCSF Chimera 1.15
MODEL FITTING Coot 0.9.4.1 EL
INITIAL EULER ASSIGNMENT cryoSPARC 4.0.0
FINAL EULER ASSIGNMENT cryoSPARC 4.0.0
CLASSIFICATION cryoSPARC 4.0.0
RECONSTRUCTION cryoSPARC 4.0.0
MODEL REFINEMENT PHENIX 1.20.1-4487
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION Patch CTF routine in cryoSPARC