1BF5

TYROSINE PHOSPHORYLATED STAT-1/DNA COMPLEX

• PDB DOI: https://doi.org/10.2210/pdb1BF5/pdb
• NAKB: 1BF5

• Classification: GENE REGULATION/DNA
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21, Escherichia coli
• Mutation(s): Yes 


• Deposited: 1998-05-27 Released: 1998-08-12 
• Deposition Author(s): Kuriyan, J., Zhao, Y., Chen, X., Vinkemeier, U., Jeruzalmi, D., Darnell Jr., J.E.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.293 
• R-Value Work: 0.227 
• R-Value Observed: 0.227 

Literature

Crystal structure of a tyrosine phosphorylated STAT-1 dimer bound to DNA.

Chen, X., Vinkemeier, U., Zhao, Y., Jeruzalmi, D., Darnell Jr., J.E., Kuriyan, J.

(1998) Cell 93: 827-839

• PubMed: 9630226 
• DOI: https://doi.org/10.1016/s0092-8674(00)81443-9
• Primary Citation of Related Structures:  
  1BF5


• PubMed Abstract: 
  

  The crystal structure of the DNA complex of a STAT-1 homodimer has been determined at 2.9 A resolution. STAT-1 utilizes a DNA-binding domain with an immunoglobulin fold, similar to that of NFkappaB and the p53 tumor suppressor protein. The STAT-1 dimer forms a contiguous C-shaped clamp around DNA that is stabilized by reciprocal and highly specific interactions between the SH2 domain of one monomer and the C-terminal segment, phosphorylated on tyrosine, of the other. The phosphotyrosine-binding site of the SH2 domain in each monomer is coupled structurally to the DNA-binding domain, suggesting a potential role for the SH2-phosphotyrosine interaction in the stabilization of DNA interacting elements.

---

Organizational Affiliation: 

The Rockefeller University, New York, New York 10021, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 77.69 kDa 
• Atom Count: 5,117 
• Modelled Residue Count: 581 
• Deposited Residue Count: 611 
• Unique protein chains: 1
• Unique nucleic acid chains: 2

Macromolecules

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
SIGNAL TRANSDUCER AND ACTIVATOR OF TRANSCRIPTION 1-ALPHA/BETA	C [auth A]	575	Homo sapiens	Mutation(s): 1
UniProt & NIH Common Fund Data Resources
Find proteins for P42224 (Homo sapiens) Explore P42224  Go to UniProtKB:  P42224
PHAROS:  P42224 GTEx:  ENSG00000115415

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*AP*CP*AP*GP*TP*TP*TP*CP*CP*CP*GP*TP*AP*AP*AP*TP*G P*C)-3')	A [auth B]	18	Homo sapiens

Entity ID: 2
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*TP*GP*CP*AP*TP*TP*TP*AP*CP*GP*GP*GP*AP*AP*AP*CP*T P*G)-3')	B [auth C]	18	N/A

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PTR	C [auth A]	L-PEPTIDE LINKING	C9 H12 N O6 P		TYR

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.293 
• R-Value Work: 0.227 
• R-Value Observed: 0.227 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 76.6	α = 90
b = 148.2	β = 90
c = 181.1	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-08-12 
Deposition Author(s): Kuriyan, J., Zhao, Y., Chen, X., Vinkemeier, U., Jeruzalmi, D., Darnell Jr., J.E.

Revision History  

• Version 1.0: 1998-08-12
  Type: Initial release
  
• Version 1.1: 2008-05-22
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-07-19
  Changes: Advisory, Derived calculations
• Version 1.4: 2018-03-07
  Changes: Derived calculations
• Version 1.5: 2022-12-21
  Changes: Database references, Derived calculations