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Lon Protease from Yersinia pestis with Y2853 substrate
ELECTRON MICROSCOPY
Refinement
RMS Deviations
Key
Refinement Restraint Deviation
f_dihedral_angle_d
6.144
f_angle_d
0.92
f_chiral_restr
0.059
f_plane_restr
0.008
f_bond_d
0.007
Sample
Lon protease bound to Y2853 substrate
Specimen Preparation
Sample Aggregation State
PARTICLE
Vitrification Instrument
HOMEMADE PLUNGER
Cryogen Name
ETHANE
Sample Vitrification Details
4 uL of sample was applied per grid and manually blotted for 4 seconds followed by immediately plunge-freezing in liquid ethane cooled by liquid nitro ...
4 uL of sample was applied per grid and manually blotted for 4 seconds followed by immediately plunge-freezing in liquid ethane cooled by liquid nitrogen.
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
118143
Reported Resolution (Å)
3
Resolution Method
FSC 0.143 CUT-OFF
Other Details
Focused classification of final reconstruction was performed on E and F "step" subunits, resulting in a reconstruction with an overall resolution of 3 ...
Focused classification of final reconstruction was performed on E and F "step" subunits, resulting in a reconstruction with an overall resolution of 3.5 A by FSC 0.143. The two maps were stitched together using vop max in UCSF Chimera. All three maps (two original and final composite) are deposited in this entry.
Refinement Type
Symmetry Type
POINT
Point Symmetry
C1
Map-Model Fitting and Refinement
Id
1
Refinement Space
REAL
Refinement Protocol
AB INITIO MODEL
Refinement Target
Correlation coefficient
Overall B Value
52
Fitting Procedure
Details
Initial homology model was built using SWISS-MODEL and initial rigid body docking was done using UCSF Chimera
Data Acquisition
Detector Type
GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)
52
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
FEI TALOS ARCTICA
Minimum Defocus (nm)
800
Maximum Defocus (nm)
1200
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
36000
Calibrated Magnification
43478
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
200
Imaging Details
Coma-free alignment procedure from Herzik & Wu, Nature Methods (2017). Preliminary grid screening was performed manually prior to data collection.