3J9Y

Cryo-EM structure of tetracycline resistance protein TetM bound to a translating E.coli ribosome


ELECTRON MICROSCOPY Experimental Data



EM Sample
Sample Vitrification Details Plunged into liquid ethane (FEI VITROBOT MARK IV)
Sample Aggregation State PARTICLE
Sample Reconstruction Method SINGLE PARTICLE
Name of Sample TetM bound to ErmC L-RNCs
EM Data Acquisition
Date of Experiment 2014-03-14
Temperature (Kelvin) --
Microscope Model FEI TITAN KRIOS
Detector Type FEI FALCON II (4k x 4k)
Minimum Defocus (nm) 700.0
Maximum Defocus (nm) 3500.0
Minimum Tilt Angle (degrees) --
Maximum Tilt Angle (degrees) --
Nominal CS 0.0
Imaging Mode BRIGHT FIELD
Electron Dose (electrons per Å**-2) 28.0
Illumination Mode SPOT SCAN
Nominal Magnification 125085
Calibrated Magnification --
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details --
3D Reconstruction
Software Package(s) SPIDER
Reconstruction Method(s) --
EM Image Reconstruction Statistics
Number of Particles 78186
Other Details Since images from microscopy were processed in the absence of spatial frequencies higher than 8 A, an FSC cut-off value of 0.143 was used for average resolution determination of 3.9 A (Scheres and Chen, 2012). The final map was sharpened by applying an automatically determined negative B-factor using the program EMBFACTOR (Fernandez et al, 2008). (Single particle--Applied symmetry: C1)
Effective Resolution 3.9
EM Map-Model Fitting and Refinement
Refinement Space Refinement Protocol Refinement Target Overall B Value Fitting Procedure Fitting Software
REAL RIGID BODY FIT -- -- -- --