1AN2 image
Deposition Date 1996-09-06
Release Date 1997-09-17
Last Version Date 2024-02-07
Entry Detail
PDB ID:
1AN2
Keywords:
TRANSCRIPTION/DNA
Title:
RECOGNITION BY MAX OF ITS COGNATE DNA THROUGH A DIMERIC B/HLH/Z DOMAIN
Biological Source:
Source Organism:
Mus musculus (Taxon ID: 10090)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.90 Å
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
P 61 2 2
1AN2 validation report
Macromolecular Entities
Polymer Type:polydeoxyribonucleotide
Molecule: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')
Chain IDs:A (auth: B)
Chain Length:22
Number of Molecules:1
Biological Source:Mus musculus
Ligand Molecules
NA
Primary Citation
Recognition by Max of its cognate DNA through a dimeric b/HLH/Z domain.
Nature 363 38 45 (1993)
PMID: 8479534 DOI: 10.1038/363038a0

Abstact

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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Primary Citation of related structures
1AN2