8HSI

ELECTRON MICROSCOPY

Sample

Transmembrane protein 87A with GFP tag and Twin-strep tag

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 445198
Reported Resolution (Å) 3.1
Resolution Method FSC 0.143 CUT-OFF
Other Details Non-uniform refinement and CTF refinement were used to improve the particle alignment and map quality.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target ?
Overall B Value 40
Fitting Procedure ?
Details Chimera Fit in map tool was used for initial local fitting. Then, Real-space refinement with the rigid body option in PHENIX was used for flexible fitting.
Data Acquisition
Detector Type GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å2) 67.72
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 800
Maximum Defocus (nm) 1900
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 58900
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Using Zemlin tableau in sherpa
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC 3.3.2
IMAGE ACQUISITION EPU 2.13
CTF CORRECTION cryoSPARC 3.3.2
MODEL FITTING UCSF Chimera 1.16
INITIAL EULER ASSIGNMENT cryoSPARC 3.3.2
FINAL EULER ASSIGNMENT cryoSPARC 3.3.2
CLASSIFICATION cryoSPARC 3.3.2
RECONSTRUCTION cryoSPARC 3.3.2
MODEL REFINEMENT PHENIX 1.19.2
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION PatchCTF in Cryosparc was used