ELECTRON MICROSCOPY

Sample

Escherichia virus T5

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details 3 uL of T5 tails sample (with or without FhuA-ND) were deposited on a freshly glow discharged EM grid and plunge-frozen in nitrogen-cooled liquid ethane using a ThermoFisher Mark IV Vitrobot device (100 percent humidity, 20 Celsius degrees, 5 s blotting time, blot force 0)
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 9290
Reported Resolution (Å) 3.88
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 BACKBONE TRACE
Refinement Target ?
Overall B Value 40
Fitting Procedure ?
Details Atomic protein models were built into the different cryo-EM maps using the Coot software by tracing the protein sequence into the densities and were then iteratively refined alternating Coot manual refinement and PHENIX real space refine tool until convergence. p140, p132, BHPpb3 and TMPpb2 C-ter models were built ab initio. For TTPpb6 and DTPpb9 models, already existing X-ray models (PDB codes 5NGJ / 4JMQ) were used as a starting point and were refined into the EM maps. Molprobity was used for model quality assessment.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 40
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 3000
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 EMAN2 ?
IMAGE ACQUISITION EPU ?
CTF CORRECTION Gctf ?
INITIAL EULER ASSIGNMENT RELION 3.0/3.1
FINAL EULER ASSIGNMENT RELION 3.0/3.1
RECONSTRUCTION RELION 3.0/3.1
MODEL REFINEMENT PHENIX ?
MODEL REFINEMENT Coot ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?
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