Transcription initiation complex structures elucidate DNA opening (OC)
ELECTRON MICROSCOPY
Sample
YEAST POL II TRANSCRIPTION INITIATION COMPLEX (OPEN DNA)
Specimen Preparation
Sample Aggregation State
PARTICLE
Vitrification Instrument
FEI VITROBOT MARK IV
Cryogen Name
ETHANE
Sample Vitrification Details
CRYOGEN - ETHANE. INSTRUMENT - FEI VITROBOT MARK IV. QUANTIFOIL R 3.5- 1 HOLEY CARBON GRIDS WERE GLOW-DISCHARGED BEFORE DEPOSITION OF 4.5 MICROLITERS ...
CRYOGEN - ETHANE. INSTRUMENT - FEI VITROBOT MARK IV. QUANTIFOIL R 3.5- 1 HOLEY CARBON GRIDS WERE GLOW-DISCHARGED BEFORE DEPOSITION OF 4.5 MICROLITERS OF SAMPLE. GRIDS WERE THEN BLOTTED FOR 8.5 S AND PLUNGE- FROZEN IN LIQUID ETHANE.
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
11231
Reported Resolution (Å)
4.35
Resolution Method
Other Details
RESIDUES INDICATED AS POLY-ALANINE ARE OF UNCERTAIN AMINO ACID REGISTER. THE FOLLOWING REGIONS WERE MODELED INTO THE INDICATED UNSHARPENED MAP DUE TO ...
RESIDUES INDICATED AS POLY-ALANINE ARE OF UNCERTAIN AMINO ACID REGISTER. THE FOLLOWING REGIONS WERE MODELED INTO THE INDICATED UNSHARPENED MAP DUE TO WEAKER DENSITY. RPB2 RESIDUES 919-932 (OC1, EMD-3375). TFIIF SUBUNIT TFG1 RESIDUES 327-330 (POLY-ALANINE) AND 404-415 (POLY-ALANINE) (OC4, EMD-3380). TFIIF SUBUNIT TFG2 RESIDUES 233-244 (POLY- ALANINE) (OC4, EMD-3380). TFIIE SUBUNITS TFA1 (POLY- ALANINE) AND TFA2 (POLY-ALANINE) AND TFIIF SUBUNIT TFG2 WINGED HELIX DOMAIN RESIDUES 294-352 (POLY-ALANINE) (OC3, EMD-3378 AND OC3-FOCUSED, EMD-3379). TFIIF SUBUNIT TFG2 WINGED HELIX DOMAIN RESIDUES 359-370 (UNK) WERE PUTATIVELY ASSIGNED TO TFG2 (OC3-FOCUSED, EMD-3379). TFIIE SUBUNIT TFA2 RESIDUES 256-280 SHOW UNCERTAIN CONNECTIVITY. THE SEQUENCE OF THE TFIIF TFG2 LINKER (RESIDUES 249-280) WAS ASSIGNED BASED ON THE STRONG SIDECHAIN DENSITY OF RESIDUES I252, L255, F277, L278 AND THEIR FIT TO THE LOCAL CHEMICAL ENVIRONMENT. TFIIF SUBUNIT TFG1 RESIDUES 21-35 WERE MODELED BASED ON A SEPARATE X-RAY ANALYSIS (PDB 5IP7) AND FITTED (OC4 ROUND 2 CLASS 2). SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-3378. (DEPOSITION ID: 14360).
