1E91

Structure of the complex of the Mad1-Sin3B interaction domains


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: 30 STRUCTURES WITH NO RESTRAINT VIOLATIONS, 20 LOWEST ENERGY STRUCTURES FINALLY SELECTED 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

The MAD1-Sin3B Interaction Involves a Novel Helical Fold

Spronk, C.A.E.M.Tessari, M.Kaan, A.M.Jansen, J.F.A.Vermeulen, M.Stunnenberg, H.G.Vuister, G.W.

(2000) Nat Struct Biol 7: 1100-1104

  • DOI: https://doi.org/10.1038/81944
  • Primary Citation of Related Structures:  
    1E91

  • PubMed Abstract: 

    Sin3A or Sin3B are components of a corepressor complex that mediates repression by transcription factors such as the helix-loop-helix proteins Mad and Mxi. Members of the Mad/Mxi family of repressors play important roles in the transition between proliferation and differentiation by down-regulating the expression of genes that are activated by the proto-oncogene product Myc. Here, we report the solution structure of the second paired amphipathic helix (PAH) domain (PAH2) of Sin3B in complex with a peptide comprising the N-terminal region of Mad1. This complex exhibits a novel interaction fold for which we propose the name 'wedged helical bundle'. Four alpha-helices of PAH2 form a hydrophobic cleft that accommodates an amphipathic Mad1 alpha-helix. Our data further show that, upon binding Mad1, secondary structure elements of PAH2 are stabilized. The PAH2-Mad1 structure provides the basis for determining the principles of protein interaction and selectivity involving PAH domains.


  • Organizational Affiliation

    Department of Biophysical Chemistry, NSR Center, University of Nijmegen, The Netherlands.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PAIRED AMPHIPATHIC HELIX PROTEIN SIN3B85Mus musculusMutation(s): 0 
Gene Names: SIN3B
UniProt
Find proteins for Q62141 (Mus musculus)
Explore Q62141 
Go to UniProtKB:  Q62141
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ62141
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
MAD PROTEIN (MAX DIMERIZER)13Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q05195 (Homo sapiens)
Explore Q05195 
Go to UniProtKB:  Q05195
PHAROS:  Q05195
GTEx:  ENSG00000059728 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ05195
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: 30 STRUCTURES WITH NO RESTRAINT VIOLATIONS, 20 LOWEST ENERGY STRUCTURES FINALLY SELECTED 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-11-20
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-17
    Changes: Database references, Source and taxonomy
  • Version 1.4: 2024-05-15
    Changes: Data collection, Database references, Other