5OA1

RNA polymerase I pre-initiation complex

ELECTRON MICROSCOPY

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Sample
RNA polymerase I pre-initiation complex
Sample Components
RNA polymerase I pre-initiation complex
RNA polymerase I pre-initiation complex
RNA polymerase I pre-initiation complex

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK II
Cryogen Name	ETHANE
Sample Vitrification Details

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	38589
Reported Resolution (Å)	4.4
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT

Map-Model Fitting and Refinement
Id	1
Refinement Space
Refinement Protocol	FLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
Details	PLEASE NOTE: This entry represents a model built based on a 4.4 Angstrom cryo-EM map. Due to the limited resolution, the sequence in several regions of Rrn6, Rrn7, and Rrn11 subunits is only tentatively assigned and may contain sequence register shifts. To account for these uncertainties, the coordinates of the Core Factor subunits Rrn6, Rrn7, and Rrn11 subunits in this entry only contain backbone atoms and unassigned helices located in the EM density are built as poly-alanines. For more details regarding the model and its limitations please refer to the publication (Sadian et al., EMBO J, 2017) associated with this entry.

Data Acquisition
Detector Type	GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)	2

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION