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Y122F mutant of Ribonucleotide reductase R2 from E. coli in its reduced (red) form
Specimen Preparation
Sample Aggregation State
3D ARRAY
Vitrification Instrument
Cryogen Name
ETHANE
Sample Vitrification Details
Excess liquid was manually blotted from the backside for approximately 10 seconds, followed by plunge freezing in liquid ethane. Sample was prepared i ...
Excess liquid was manually blotted from the backside for approximately 10 seconds, followed by plunge freezing in liquid ethane. Sample was prepared in an inert environment within a glove box.
3D Reconstruction
Reconstruction Method
CRYSTALLOGRAPHY
Number of Particles
Reported Resolution (Å)
1.8
Resolution Method
DIFFRACTION PATTERN/LAYERLINES
Other Details
Refinement Type
Symmetry Type
3D CRYSTAL
Space Group Name
Length a
73.95
Length b
76.54
Length c
76.54
Angle Alpha
90
Angle Beta
90
Angle Gamma
90
Map-Model Fitting and Refinement
Id
1 (1xik)
Refinement Space
RECIPROCAL
Refinement Protocol
OTHER
Refinement Target
Maximum-likelihood
Overall B Value
26.54
Fitting Procedure
Details
Data Acquisition
Detector Type
OTHER
Electron Dose (electrons/Å**2)
1.38
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
TFS KRIOS
Minimum Defocus (nm)
Maximum Defocus (nm)
1
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode
DIFFRACTION
Specimen Holder Model
FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification
Calibrated Magnification
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
300
Imaging Details
To address the preferred orientation of ribbon-shaped crystals on the grid, SerialED data was collected at tilt angles of 0, 10, 25, 45, and 60 degrees. Lower tilts minimized absorption for improved resolution, while higher tilts expanded reciprocal space coverage.