ELECTRON MICROSCOPY


Sample

Dimer complex of Human Plexin-A1 27-710 with aPlexinA1-19-43 Fab binding

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details To prepare cryo-grids, 3 ul samples were applied to glow discharged Quantifoil Au grids (R2/2, 300 mesh), which were subsequently blotted with filter paper (Ted Pella) for 3 seconds at 18oC and 100% humidity. The grids were immediately plunge frozen in liquid ethane using a FEI Vitrobot IV (ThermoFisher)
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 253734
Reported Resolution (Å) 3.33
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 AB INITIO MODEL
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details Initial local fitting was done using Chimera X, followed by manual fitting using Coot. Finally it was refined using Phenix real space refinement
Data Acquisition
Detector Type FEI FALCON III (4k x 4k)
Electron Dose (electrons/Å2) 50.0
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1200
Maximum Defocus (nm) 2500
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode OTHER
Specimen Holder Model ?
Nominal Magnification ?
Calibrated Magnification ?
Source OTHER
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC 4.1.2
CTF CORRECTION cryoSPARC 4.1.2
MODEL FITTING UCSF ChimeraX ?
MODEL FITTING Coot 0.9.8.7
INITIAL EULER ASSIGNMENT cryoSPARC 4.1.2
FINAL EULER ASSIGNMENT cryoSPARC 4.1.2
CLASSIFICATION cryoSPARC 4.1.2
RECONSTRUCTION cryoSPARC 4.1.2
MODEL REFINEMENT PHENIX 1.21
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?
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