7MEI | pdb_00007mei

Composite structure of EC+EC

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	5C4J
experimental model	PDB	3PO2
experimental model	PDB	5FMF

Sample
Head-to-end Colliding RNAPII Elongation

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	LEICA EM CPC
Cryogen Name	ETHANE
Sample Vitrification Details

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	57690
Reported Resolution (Å)	3.54
Resolution Method	FSC 0.143 CUT-OFF
Other Details	this is a composite structure composed of two parts. one part was finally calculated with 66261 parties to 3.54 angstrom , the other one part was finally calculated with 57690 particles to 3.54 angstrom .
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1 (5C4J, 3PO2, 5FMF)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	1.25

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	750
Maximum Defocus (nm)	1750
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2.7
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	81000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
CTF CORRECTION	CTFFIND	4.1.13
MODEL FITTING	UCSF Chimera
INITIAL EULER ASSIGNMENT	RELION
FINAL EULER ASSIGNMENT	RELION
RECONSTRUCTION	RELION
MODEL REFINEMENT	PHENIX
MODEL REFINEMENT	Coot

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
NONE		2565746