ELECTRON MICROSCOPY

Sample

Complex of STAR-0215 Fab with active plasma kallikrein

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Grids were prepared using a ThermoFisher Vitrobot MkIV with the chamber held at 18C and 100% relative humidity. 3.5 uL of the sample was applied to an UltrAuFoil 1.2/1.3 300 mesh grid that had been freshly glow discharged, blotted for 4 seconds, and plunge frozen in liquid ethane.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 299175
Reported Resolution (Å) 2.62
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
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å2) 70
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 700
Maximum Defocus (nm) 2100
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 Topaz 0.2.5
IMAGE ACQUISITION EPU 3.0
CTF CORRECTION CTFFIND 4.1.14
CTF CORRECTION RELION 4.0
MODEL FITTING PHENIX 1.20.1
MODEL FITTING UCSF Chimera 1.15
INITIAL EULER ASSIGNMENT RELION 4.0
FINAL EULER ASSIGNMENT RELION 4.0
CLASSIFICATION RELION 4.0
RECONSTRUCTION RELION 4.0
MODEL REFINEMENT PHENIX 1.20.1
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?
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