ELECTRON MICROSCOPY

Sample

Tetrameric sample of purified Methylmalonic acid semialdehyde dehydrogenase

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details BuceA.00020.a.B1.PS01775 was diluted from 58 mg/mL to 10 mg/mL into dilution buffer (25 mM HEPES pH 8.0, 150 mM NaCl) and then further diluted to 1 mg/mL in dilution buffer supplemented with 1 mM NAD. 3 uL of mix was transferred onto a Cu 300 QF R1.2/1.3 grid and vitrified in liquid ethane with a Vitrobot using the following parameters: 3 sec wait, 4 sec blot at blot force 7, 95% humidity, 5 C. Data were collected on the University of Washington Glacios equipped with a K3 camera; CEM0001125JA.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 2412495
Reported Resolution (Å) 2.38
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 ?
Refinement Target ‘’
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K3 (6k x 4k)
Electron Dose (electrons/Å2) 47.3
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS GLACIOS
Minimum Defocus (nm) 200
Maximum Defocus (nm) 1000
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 ?
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC ?
MODEL FITTING UCSF ChimeraX ?
MODEL FITTING Coot ?
MODEL REFINEMENT PHENIX 2.0_5761
RECONSTRUCTION cryoSPARC ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?