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Cryo-EM structure of the closed-closed dextran utilisome (BT3087-BT3090), with GHdex D297A E360A catalytic inactivation, with bound IMO4, IMO6 and IMO8
ELECTRON MICROSCOPY
Sample
Dextran utilisome of Bacteroides thetaiotaomicron, with a catalytic-inactive GHdex, in complex with dextran.
Specimen Preparation
Sample Aggregation State
PARTICLE
Vitrification Instrument
FEI VITROBOT MARK IV
Cryogen Name
ETHANE
Sample Vitrification Details
Added dextran 1.5 & 5 (0.5 mM) and Fluorinated Octyl Maltoside at 0.05% (CMC)
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
116104
Reported Resolution (Å)
2.5
Resolution Method
FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type
POINT
Point Symmetry
C1
Map-Model Fitting and Refinement
Id
1
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector Type
GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)
23.1
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
TFS KRIOS
Minimum Defocus (nm)
1000
Maximum Defocus (nm)
2000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode
BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
300
Imaging Details
Krios recollection of a grid previously collected Glacios grid. Grid squares previously collected were excluded.