Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 11619.98 
• Atom Count: 820 
• Residue Count: 98 
• Unique protein chains: 2

1E91

Structure of the complex of the Mad1-Sin3B interaction domains

• DOI: 10.2210/pdb1E91/pdb
• BMRB: 4841

• Classification: EUKARYOTIC TRANSCRIPTIONAL REGULATION
• Organism(s): Mus musculus, Homo sapiens
• Expression System: Escherichia coli BL21


• Deposited: 2000-10-04 Released: 2000-11-20 
• Deposition Author(s): Spronk, C.A.E.M., Tessari, M., Kaan, A.M., Jansen, J.F.A., Vermeulen, M., Stunnenberg, H.G., Vuister, G.W.

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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 

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.Mol.Biol. 7: 1100-1104

• PubMed: 11101889 
• DOI: 10.1038/81944


• 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PAIRED AMPHIPATHIC HELIX PROTEIN SIN3B	A	85	Mus musculus	Mutation(s): 0  Gene Names: Sin3b (Kiaa0700)
Find proteins for Q62141 (Mus musculus) Go to UniProtKB:  Q62141

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
MAD PROTEIN (MAX DIMERIZER)	B	13	Homo sapiens	Mutation(s): 0  Gene Names: MXD1 (MAD)
Find proteins for Q05195 (Homo sapiens) Go to Gene View: MXD1 Go to UniProtKB:  Q05195

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 
• Olderado: 1E91 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-10-04 
• Released Date: 2000-11-20 
• Deposition Author(s): Spronk, C.A.E.M., Tessari, M., Kaan, A.M., Jansen, J.F.A., Vermeulen, M., Stunnenberg, H.G., Vuister, G.W.

Revision History 

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