ELECTRON MICROSCOPY

Sample

Reduced recombinant human alphaA-crystallin

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details Diluted equilibrated specimen was added to glow-discharged (30s) grids. Sample was blotted 30s after sample application and immediately plunged.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 19783
Reported Resolution (Å) 9.8
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space ?
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details Structure created by homology modelling using PDB 3N3E and the N-terminal region (1-60) modelled using I-Tasser. The model was refined by flexible fitting into the EM density map EMD-4894. The N-terminus is modelled only as CA atoms.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 30
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 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 37000
Calibrated Magnification 37037
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION EMAN2 2.0
IMAGE ACQUISITION TOM ?
CTF CORRECTION Bsoft ?
MODEL FITTING Amber 16
RECONSTRUCTION IMAGIC 5
MODEL REFINEMENT Amber 16
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING ONLY ?