Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A2B1C Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 4-mer - A2B 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 59.63 kDa 
• Atom Count: 4034 
• Residue Count: 403 
• Unique protein chains: 3
• Unique nucleic acid chains: 2

1T2K

Structure Of The DNA Binding Domains Of IRF3, ATF-2 and Jun Bound To DNA

• DOI: 10.2210/pdb1T2K/pdb
• NDB: PD0540

• Classification: Transcription/DNA
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2004-04-21 Released: 2004-11-16 
• Deposition Author(s): Panne, D., Maniatis, T., Harrison, S.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.296 
• R-Value Work: 0.257 
• R-Value Observed: 0.257 

Literature

Crystal structure of ATF-2/c-Jun and IRF-3 bound to the interferon-beta enhancer.

Panne, D., Maniatis, T., Harrison, S.C.

(2004) EMBO J 23: 4384-4393

• PubMed: 15510218 
• DOI: 10.1038/sj.emboj.7600453
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Transcriptional activation of the interferon-beta (IFN-beta) gene requires assembly of an enhanceosome containing the transcription factors ATF-2/c-Jun, IRF-3/IRF-7, NF-kappaB and HMGI(Y). These factors cooperatively bind a composite DNA site and activate expression of the IFN-beta gene. The 3.0 A crystal structure of the DNA-binding domains of ATF-2/c-Jun and two IRF-3 molecules in a complex with 31 base pairs (bp) of the PRDIV-PRDIII region of the IFN-beta enhancer shows that association of the four proteins with DNA creates a continuous surface for the recognition of 24 bp. The structure, together with in vitro binding studies and protein mutagenesis, shows that protein-protein interactions are not critical for cooperative binding. Instead, cooperativity arises mainly through nucleotide sequence-dependent structural changes in the DNA that allow formation of complementary DNA conformations. Because the binding sites overlap on the enhancer, the unit of recognition is the entire nucleotide sequence, not the individual subsites.

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Organizational Affiliation: 

Department of Biological Chemistry & Molecular Pharmacology, Howard Hughes Medical Institute, Harvard Medical School, Boston, MA, USA.

Macromolecules

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
Interferon regulatory factor 3	A, B	112	Homo sapiens	Mutation(s): 0  Gene Names: IRF3
Find proteins for Q14653 (Homo sapiens) Explore Q14653  Go to UniProtKB:  Q14653
NIH Common Fund Data Resources
PHAROS  Q14653 GTEx  ENSG00000126456

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details
Transcription factor AP-1	C	62	Homo sapiens	Mutation(s): 1  Gene Names: JUN
Find proteins for P05412 (Homo sapiens) Explore P05412  Go to UniProtKB:  P05412
NIH Common Fund Data Resources
PHAROS  P05412 GTEx  ENSG00000177606

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details
Cyclic-AMP-dependent transcription factor ATF-2	D	61	Homo sapiens	Mutation(s): 1  Gene Names: ATF2, CREB2, CREBP1 EC: 2.3.1.48
Find proteins for P15336 (Homo sapiens) Explore P15336  Go to UniProtKB:  P15336
NIH Common Fund Data Resources
PHAROS  P15336 GTEx  ENSG00000115966

Entity ID: 2
Molecule	Chains	Length	Organism
31-MER	F	31	N/A

Entity ID: 1
Molecule	Chains	Length	Organism
31-MER	E	31	N/A

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.296 
• R-Value Work: 0.257 
• R-Value Observed: 0.257 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 186.38	α = 90
b = 65.21	β = 93.44
c = 83.85	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-04-21 
• Released Date: 2004-11-16 
Deposition Author(s): Panne, D., Maniatis, T., Harrison, S.C.

Revision History 

• Version 1.0: 2004-11-16
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance