1FOS

TWO HUMAN C-FOS:C-JUN:DNA COMPLEXES

• PDB DOI:  https://doi.org/10.2210/pdb1FOS/pdb
• NAKB: 1FOS

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


• Deposited: 1995-03-07 Released: 1995-07-10 
• Deposition Author(s): Glover, J.N.M., Harrison, S.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.05 Å
• R-Value Free: 0.321 
• R-Value Work: 0.230 
• R-Value Observed: 0.230 

Literature

Crystal structure of the heterodimeric bZIP transcription factor c-Fos-c-Jun bound to DNA.

Glover, J.N., Harrison, S.C.

(1995) Nature 373: 257-261

• PubMed: 7816143 
• DOI: https://doi.org/10.1038/373257a0
• Primary Citation of Related Structures:  
  1FOS


• PubMed Abstract: 
  

The Fos and Jun families of eukaryotic transcription factors heterodimerize to form complexes capable of binding 5'-TGAGTCA-3' DNA elements. We have determined the X-ray crystal structure of a heterodimer of the bZIP regions of c-Fos and c-Jun bound to DNA. Both subunits form continuous alpha-helices. The carboxy-terminal regions form an asymmetric coiled-coil, and the amino-terminal regions make base-specific contacts with DNA in the major groove. Comparison of the two crystallographically distinct protein-DNA complexes show that the coiled-coil is flexibly joined to the basic regions and that the Fos-Jun heterodimer does not recognize the asymmetric 5'-TGAGTCA-3' recognition element in a unique orientation. There is an extensive network of electrostatic interactions between subunits within the coiled-coil, consistent with proposals that these interactions determine preferential formation of the heterodimer over either of the homodimers.

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Organizational Affiliation: 

Howard Hughes Medical Institute, Harvard University, Cambridge, Massachusetts 02138.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 53.93 kDa 
• Atom Count: 3,480 
• Modelled Residue Count: 314 
• Deposited Residue Count: 328 
• Unique protein chains: 2
• Unique nucleic acid chains: 2

Macromolecules

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
P55-C-FOS PROTO-ONCOGENE PROTEIN	E, G	62	Homo sapiens	Mutation(s): 1  Gene Names: FOS, G0S7
UniProt & NIH Common Fund Data Resources
Find proteins for P01100 (Homo sapiens) Explore P01100  Go to UniProtKB:  P01100
PHAROS:  P01100

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
C-JUN PROTO-ONCOGENE PROTEIN	F, H	62	Homo sapiens	Mutation(s): 1  Gene Names: JUN
UniProt & NIH Common Fund Data Resources
Find proteins for P05412 (Homo sapiens) Explore P05412  Go to UniProtKB:  P05412
PHAROS:  P05412

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*AP*AP*TP*GP*GP*AP*TP*GP*AP*GP*TP*CP*AP*TP*AP*GP*GP*AP*GP*A)-3')	A, C	20	N/A

Entity ID: 2
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*TP*TP*CP*TP*CP*CP*TP*AP*TP*GP*AP*CP*TP*CP*AP*TP*CP*CP*AP*T)-3')	B, D	20	N/A

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.05 Å
• R-Value Free: 0.321 
• R-Value Work: 0.230 
• R-Value Observed: 0.230 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 241.1	α = 90
b = 48.69	β = 90
c = 66	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	refinement
XDS	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 1995-07-10 
Deposition Author(s): Glover, J.N.M., Harrison, S.C.

Revision History  

• Version 1.0: 1995-07-10
  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: 2021-11-03
  Changes: Database references