Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 32.80 kDa 
• Atom Count: 2358 
• Modelled Residue Count: 267 
• Deposited Residue Count: 280 
• Unique protein chains: 1

1EQF

CRYSTAL STRUCTURE OF THE DOUBLE BROMODOMAIN MODULE FROM HUMAN TAFII250

• PDB DOI: 10.2210/pdb1EQF/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2000-04-04 Released: 2000-06-07 
• Deposition Author(s): Jacobson, R.H., Ladurner, A.G., King, D.S., Tjian, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.246 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 

Literature

Structure and function of a human TAFII250 double bromodomain module.

Jacobson, R.H., Ladurner, A.G., King, D.S., Tjian, R.

(2000) Science 288: 1422-1425

• PubMed: 10827952 
• DOI: 10.1126/science.288.5470.1422
• Primary Citation of Related Structures:  
  1EQF


• PubMed Abstract: 
  

TFIID is a large multiprotein complex that initiates assembly of the transcription machinery. It is unclear how TFIID recognizes promoters in vivo when templates are nucleosome-bound. Here, it is shown that TAFII250, the largest subunit of TFIID, contains two tandem bromodomain modules that bind selectively to multiply acetylated histone H4 peptides. The 2.1 angstrom crystal structure of the double bromodomain reveals two side-by-side, four-helix bundles with a highly polarized surface charge distribution. Each bundle contains an Nepsilon-acetyllysine binding pocket at its center, which results in a structure ideally suited for recognition of diacetylated histone H4 tails. Thus, TFIID may be targeted to specific chromatin-bound promoters and may play a role in chromatin recognition.

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Organizational Affiliation: 

Howard Hughes Medical Institute and Department of Molecular and Cell Biology, 401 Barker Hall, University of California, Berkeley, CA 94720-3204, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
RNA POLYMERASE II TRANSCRIPTION INITIATION FACTOR	A	280	Homo sapiens	Mutation(s): 0  Gene Names: TAF1, BA2R, CCG1, CCGS, TAF2A EC: 2.3.1.48 (UniProt), 2.7.11.1 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P21675 (Homo sapiens) Explore P21675  Go to UniProtKB:  P21675
PHAROS:  P21675

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.246 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.1	α = 90
b = 58.1	β = 90
c = 101.5	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
MLPHARE	phasing
CNS	refinement
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-04-04 
• Released Date: 2000-06-07 
Deposition Author(s): Jacobson, R.H., Ladurner, A.G., King, D.S., Tjian, R.

Revision History  

• Version 1.0: 2000-06-07
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance