1NKP

Crystal structure of Myc-Max recognizing DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.219 

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This is version 1.3 of the entry. See complete history


Literature

X-ray structures of Myc-Max and Mad-Max recognizing DNA: Molecular bases of regulation by proto-oncogenic transcription factors

Nair, S.K.Burley, S.K.

(2003) Cell 112: 193-205

  • DOI: 10.1016/s0092-8674(02)01284-9
  • Primary Citation of Related Structures:  
    1NKP, 1NLW

  • PubMed Abstract: 
  • X-ray structures of the basic/helix-loop-helix/leucine zipper (bHLHZ) domains of Myc-Max and Mad-Max heterodimers bound to their common DNA target (Enhancer or E box hexanucleotide, 5'-CACGTG-3') have been determined at 1.9 A and 2.0 A resolution, respectively ...

    X-ray structures of the basic/helix-loop-helix/leucine zipper (bHLHZ) domains of Myc-Max and Mad-Max heterodimers bound to their common DNA target (Enhancer or E box hexanucleotide, 5'-CACGTG-3') have been determined at 1.9 A and 2.0 A resolution, respectively. E box recognition by these two structurally similar transcription factor pairs determines whether a cell will divide and proliferate (Myc-Max) or differentiate and become quiescent (Mad-Max). Deregulation of Myc has been implicated in the development of many human cancers, including Burkitt's lymphoma, neuroblastomas, and small cell lung cancers. Both quasisymmetric heterodimers resemble the symmetric Max homodimer, albeit with marked structural differences in the coiled-coil leucine zipper regions that explain preferential homo- and heteromeric dimerization of these three evolutionarily related DNA-binding proteins. The Myc-Max heterodimer, but not its Mad-Max counterpart, dimerizes to form a bivalent heterotetramer, which explains how Myc can upregulate expression of genes with promoters bearing widely separated E boxes.


    Organizational Affiliation

    Laboratories of Molecular Biophysics, Howard Hughes Medical Institute, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Myc proto-oncogene proteinE [auth A],
G [auth D]
88Homo sapiensMutation(s): 0 
Gene Names: MYCBHLHE39
UniProt & NIH Common Fund Data Resources
Find proteins for P01106 (Homo sapiens)
Explore P01106 
Go to UniProtKB:  P01106
PHAROS:  P01106
GTEx:  ENSG00000136997 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01106
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Max proteinF [auth B],
H [auth E]
83Homo sapiensMutation(s): 0 
Gene Names: MAXBHLHD4
UniProt & NIH Common Fund Data Resources
Find proteins for P61244 (Homo sapiens)
Explore P61244 
Go to UniProtKB:  P61244
PHAROS:  P61244
GTEx:  ENSG00000125952 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61244
Protein Feature View
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  • Reference Sequence

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Entity ID: 1
MoleculeChainsLengthOrganismImage
5'-D(*CP*GP*AP*GP*TP*AP*GP*CP*AP*CP*GP*TP*GP*CP*TP*AP*CP*TP*C)-3'A [auth F],
B [auth G],
C [auth H],
D [auth J]
19N/A
Protein Feature View
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
DNA PDBBind:  1NKP Kd: 90 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.219 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.244α = 87.91
b = 45.128β = 84.61
c = 86.484γ = 71.5
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
X-PLORmodel building
CNSrefinement
HKL-2000data reduction
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-02-04
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-02-03
    Changes: Database references, Structure summary