ELECTRON MICROSCOPY

Sample

YEAST POL II TRANSCRIPTION INITIATION COMPLEX (CLOSED DNA)

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details LIQUID ETHANE
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 5690
Reported Resolution (Å) 8.8
Resolution Method ?
Other Details THE MODEL FOR THE CLOSED COMPLEX WAS DERIVED FROM THE OPEN COMPLEX MODEL (5FYW). THREE RIGID-BODY GROUPS (1. POL II, TFIIA, TFIIB, TBP, TFIIE E-RIBBON AND TFIIF DIMERIZATION DOMAIN, 2. TFIIE DOMAINS TFA1 AND TFA2 WH, 3.TFIIE TFA2 WH1 AND TFIIF TFG2 WH) WERE INDIVIDUALLY FITTED INTO THE CLOSED COMPLEX EM DENSITY BY AN AUTOMATED CORRELATION SEARCH IN SITUS. TO MODEL CLOSED PROMOTER DNA, UPSTREAM DNA WAS EXTENDED WITH CANONICAL DUPLEX B-FORM DNA IN COOT AND RIGID-BODY FITTED IN UCSF CHIMERA TO REFLECT THE DENSITY. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-3383. (DEPOSITION ID: 14367).
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 40
Imaging Experiment
Date of Experiment 2016-06-20
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 800
Maximum Defocus (nm) 5000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model .
Nominal Magnification 37000
Calibrated Magnification 37037
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
? EACH PARTICLE