3JCN

Structures of ribosome-bound initiation factor 2 reveal the mechanism of subunit association: Initiation Complex I


ELECTRON MICROSCOPY Experimental Data



EM Sample
Sample Vitrification Details Blot for 2-4 seconds before plunging into liquid ethane (FEI VITROBOT MARK I).
Sample Aggregation State PARTICLE
Sample Reconstruction Method SINGLE PARTICLE
Name of Sample 70S-fMet-tRNAiMet-IF2-GDPNP complex: Initiation Complex I
EM Data Acquisition
Date of Experiment 2015-06-10
Temperature (Kelvin) --
Microscope Model FEI POLARA 300
Detector Type GATAN K2 (4k x 4k)
Minimum Defocus (nm) 190.0
Maximum Defocus (nm) 7570.0
Minimum Tilt Angle (degrees) --
Maximum Tilt Angle (degrees) --
Nominal CS 2.0
Imaging Mode BRIGHT FIELD
Electron Dose (electrons per Å**-2) 20.0
Illumination Mode FLOOD BEAM
Nominal Magnification 31000
Calibrated Magnification 39000
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details --
3D Reconstruction
Software Package(s) EMAN, SPARX, SPIDER
Reconstruction Method(s) --
EM Image Reconstruction Statistics
Number of Particles 14872
Other Details Final maps were calculated from two combined datasets. To avoid overfitting, the data were refined in a resolution-limited scheme using SPIDER.
Effective Resolution 4.6