Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 13.09 kDa 
• Atom Count: 700 
• Modelled Residue Count: 85 
• Deposited Residue Count: 110 
• Unique protein chains: 1

1Q1H

An extended winged helix domain in general transcription factor E/IIE alpha

• DOI: 10.2210/pdb1Q1H/pdb

• Classification: TRANSCRIPTION
• Organism(s): Saccharolobus solfataricus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-07-21 Released: 2003-12-09 
• Deposition Author(s): Meinhart, A., Blobel, J., Cramer, P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.321 
• R-Value Work: 0.315 
• R-Value Observed: 0.315 

Literature

An Extended Winged Helix Domain in General Transcription Factor E/IIE alpha

Meinhart, A., Blobel, J., Cramer, P.

(2003) J Biol Chem 278: 48267-48274

• PubMed: 13679366 
• DOI: 10.1074/jbc.M307874200
• Primary Citation of Related Structures:  
  1Q1H


• PubMed Abstract: 
  

Initiation of eukaryotic mRNA transcription requires melting of promoter DNA with the help of the general transcription factors TFIIE and TFIIH. Here we define a conserved and functionally essential N-terminal domain in TFE, the archaeal homolog of the large TFIIE subunit alpha. X-ray crystallography shows that this TFE domain adopts a winged helix-turn-helix (winged helix) fold, extended by specific alpha-helices at the N and C termini. Although the winged helix fold is often found in DNA-binding proteins, we show that TFE is not a typical DNA-binding winged helix protein, because its putative DNA-binding face shows a negatively charged groove and an unusually long wing, and because the domain lacks DNA-binding activity in vitro. The groove and a conserved hydrophobic surface patch on the additional N-terminal alpha-helix may, however, allow for interactions with other general transcription factors and RNA polymerase. Homology modeling shows that the TFE domain is conserved in TFIIE alpha, including the potential functional surfaces.

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Organizational Affiliation: 

Institute of Biochemistry, Gene Center, University of Munich, Feodor-Lynen-Strasse 25, 81377 Munich, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transcription Factor E	A	110	Saccharolobus solfataricus	Mutation(s): 0  Gene Names: tfe
Find proteins for Q980M5 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)) Explore Q980M5  Go to UniProtKB:  Q980M5

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.321 
• R-Value Work: 0.315 
• R-Value Observed: 0.315 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 66.1	α = 90
b = 66.1	β = 90
c = 92.7	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SOLVE	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-07-21 
• Released Date: 2003-12-09 
Deposition Author(s): Meinhart, A., Blobel, J., Cramer, P.

Revision History  

• Version 1.0: 2003-12-09
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance