1BG1

TRANSCRIPTION FACTOR STAT3B/DNA COMPLEX

• PDB DOI:  https://doi.org/10.2210/pdb1BG1/pdb
• NAKB: 1BG1

• Classification: TRANSCRIPTION/DNA
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21
• Mutation(s): Yes 


• Deposited: 1998-06-03 Released: 1999-01-13 
• Deposition Author(s): Becker, S., Groner, B., Muller, C.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.301 
• R-Value Work: 0.246 

Literature

Three-dimensional structure of the Stat3beta homodimer bound to DNA.

Becker, S., Groner, B., Muller, C.W.

(1998) Nature 394: 145-151

• PubMed: 9671298 
• DOI: https://doi.org/10.1038/28101
• Primary Citation of Related Structures:  
  1BG1


• PubMed Abstract: 
  

STAT proteins are a family of eukaryotic transcription factors that mediate the response to a large number of cytokines and growth factors. Upon activation by cell-surface receptors or their associated kinases, STAT proteins dimerize, translocate to the nucleus and bind to specific promoter sequences on their target genes. Here we report the first crystal structure of a STAT protein bound to its DNA recognition site at 2.25 A resolution. The structure provides insight into the various steps by which STAT proteins deliver a response signal directly from the cell membrane to their target genes in the nucleus.

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Organizational Affiliation: 

European Molecular Biology Laboratory, Grenoble Outstation, France.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 73.66 kDa 
• Atom Count: 5,018 
• Modelled Residue Count: 577 
• Deposited Residue Count: 614 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

Macromolecules

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (TRANSCRIPTION FACTOR STAT3B)	B [auth A]	596	Mus musculus	Mutation(s): 1  Gene Names: Stat3, Aprf
UniProt
Find proteins for P42227 (Mus musculus) Explore P42227  Go to UniProtKB:  P42227

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*TP*GP*CP*AP*TP*TP*TP*CP*CP*CP*GP*TP*AP*AP*AP*TP*CP*T)-3')	A [auth B]	18	N/A

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.301 
• R-Value Work: 0.246 
• Space Group: I 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 174	α = 90
b = 174	β = 90
c = 79.4	γ = 90

Software Package:

Software Name	Purpose
MLPHARE	phasing
SHARP	phasing
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-01-13 
Deposition Author(s): Becker, S., Groner, B., Muller, C.W.

Revision History  

• Version 1.0: 1999-01-13
  Type: Initial release
  
• Version 1.1: 2008-05-22
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance