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Complex between T5 Receptor Binding Protein pb5 and its E. coli receptor FhuA, stabilized with detergent
Sample Components
E. coli receptor FhuA
T5 Receptor Binding Protein pb5
Specimen Preparation
Sample Aggregation State
PARTICLE
Vitrification Instrument
FEI VITROBOT MARK IV
Cryogen Name
ETHANE
Sample Vitrification Details
3.5 microliters of the FhuA-pb5 complex were deposited on a freshly glow discharged (25 mA, 30 sec) Cu/Rh 400 mesh Quantifoil R 2/1 EM grids and flash ...
3.5 microliters of the FhuA-pb5 complex were deposited on a freshly glow discharged (25 mA, 30 sec) Cu/Rh 400 mesh Quantifoil R 2/1 EM grids and flash-frozen in nitrogen-cooled liquid ethane using a ThermoFisher Mark IV Vitrobot device (100% humidity, 293.15K, 2s blotting time, blot force 1).
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
109350
Reported Resolution (Å)
2.6
Resolution Method
FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type
POINT
Point Symmetry
C1
Map-Model Fitting and Refinement
Id
1 (2GRX)
Refinement Space
REAL
Refinement Protocol
AB INITIO MODEL
Refinement Target
Overall B Value
Fitting Procedure
Details
The pb5 protein model was built de novo in the cryo-electron microscopy map. FhuA was adapted from the FhuA structure solved by X-ray crystallography ...
The pb5 protein model was built de novo in the cryo-electron microscopy map. FhuA was adapted from the FhuA structure solved by X-ray crystallography (PDB 2GRX). The two structures were first refined separately using Coot (version 0.9.2) and Phenix (version 1.18.2-3874) softwares, then together. Structure validation was done using MolProbity.