1AN2

RECOGNITION BY MAX OF ITS COGNATE DNA THROUGH A DIMERIC B/HLH/Z DOMAIN

• PDB DOI: https://doi.org/10.2210/pdb1AN2/pdb
• NAKB: 1AN2

• Classification: TRANSCRIPTION/DNA
• Organism(s): Mus musculus, Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1996-09-06 Released: 1997-09-17 
• Deposition Author(s): Ferre-D'Amare, A.R., Prendergast, G.C., Ziff, E.B., Burley, S.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Work: 0.232 
• R-Value Observed: 0.232 

Literature

Recognition by Max of its cognate DNA through a dimeric b/HLH/Z domain.

Ferre-D'Amare, A.R., Prendergast, G.C., Ziff, E.B., Burley, S.K.

(1993) Nature 363: 38-45

• PubMed: 8479534 
• DOI: https://doi.org/10.1038/363038a0
• Primary Citation of Related Structures:  
  1AN2


• PubMed Abstract: 
  

  The three-dimensional structure of the basic/helix-loop-helix/leucine zipper domain of the transcription factor Max complexed with DNA has been determined by X-ray crystallography at 2.9 A resolution. Max binds as a dimer to its recognition sequence CACGTG by direct contacts between the alpha-helical basic region and the major groove. This symmetric homodimer, a new protein fold, is a parallel, left-handed, four-helix bundle, with each monomer containing two alpha-helical segments separated by a loop. The two alpha-helical segments are composed of the basic region plus helix 1 and helix 2 plus the leucine repeat, respectively. As in GCN4, the leucine repeat forms a parallel coiled coil.

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Organizational Affiliation: 

Laboratories of Molecular Biophysics, Rockefeller University, New York, New York 10021.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 16.97 kDa 
• Atom Count: 1,165 
• Modelled Residue Count: 108 
• Deposited Residue Count: 108 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

Macromolecules

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (TRANSCRIPTION FACTOR MAX (TF MAX))	B [auth A]	86	Homo sapiens	Mutation(s): 0  Gene Names: MAX
UniProt & NIH Common Fund Data Resources
Find proteins for P61244 (Homo sapiens) Explore P61244  Go to UniProtKB:  P61244
PHAROS:  P61244 GTEx:  ENSG00000125952

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*GP*TP*GP*TP*AP*GP*GP*TP*CP*AP*CP*GP*TP*GP*AP*CP*C P*TP*AP*CP*AP*C)- 3')	A [auth B]	22	Mus musculus

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Work: 0.232 
• R-Value Observed: 0.232 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 72.2	α = 90
b = 72.2	β = 90
c = 146.4	γ = 120

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-09-17 
Deposition Author(s): Ferre-D'Amare, A.R., Prendergast, G.C., Ziff, E.B., Burley, S.K.

Revision History  

• Version 1.0: 1997-09-17
  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: 2013-04-03
  Changes: Version format compliance
• Version 1.4: 2021-02-03
  Changes: Database references, Structure summary
• Version 1.5: 2024-02-07
  Changes: Data collection, Database references