Macromolecule Content

• Total Structure Weight: 9.36 kDa 
• Atom Count: 658 
• Modelled Residue Count: 81 
• Deposited Residue Count: 81 
• Unique protein chains: 1

1MUZ

NMR STRUCTURE OF THE TUMOR SUPPRESSOR BIN1: ALTERNATIVE SPLICING IN MELANOMA AND INTERACTION WITH C-MYC

• DOI: 10.2210/pdb1MUZ/pdb

• Classification: ENDOCYTOSIS/EXOCYTOSIS
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2002-09-24 Released: 2003-09-30 
• Deposition Author(s): Pineda-Lucena, A., Arrowsmith, C.H.

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

A structure-based model of the c-Myc/Bin1 protein interaction shows alternative splicing of Bin1 and c-Myc phosphorylation are key binding determinants.

Pineda-Lucena, A., Ho, C.S., Mao, D.Y., Sheng, Y., Laister, R.C., Muhandiram, R., Lu, Y., Seet, B.T., Katz, S., Szyperski, T., Penn, L.Z., Arrowsmith, C.H.

(2005) J Mol Biol 351: 182-194

• PubMed: 15992821 
• DOI: 10.1016/j.jmb.2005.05.046
• Primary Citation of Related Structures:  
  1MV0, 1MV3, 1MUZ


• PubMed Abstract: 
  

The N terminus of the c-Myc oncoprotein interacts with Bin1, a ubiquitously expressed nucleocytoplasmic protein with features of a tumor suppressor. The c-Myc/Bin1 interaction is dependent on the highly conserved Myc Box 1 (MB1) sequence of c-Myc. The c-Myc/Bin1 interaction has potential regulatory significance as c-Myc-mediated transformation and apoptosis can be modulated by the expression of Bin1. Multiple splicing of the Bin1 transcript results in ubiquitous, tissue-specific and tumor-specific populations of Bin1 proteins in vivo. We report on the structural features of the interaction between c-Myc and Bin1, and describe two mechanisms by which the binding of different Bin1 isoforms to c-Myc may be regulated in cells. Our findings identify a consensus class II SH3-binding motif in c-Myc and the C-terminal SH3 domain of Bin1 as the primary structure determinants of their interaction. We present biochemical and structural evidence that tumor-specific isoforms of Bin1 are precluded from interaction with c-Myc through an intramolecular polyproline-SH3 domain interaction that inhibits the Bin1 SH3 domain from binding to c-Myc. Furthermore, c-Myc/Bin1 interaction can be inhibited by phosphorylation of c-Myc at Ser62, a functionally important residue found within the c-Myc SH3-binding motif. Our data provide a structure-based model of the c-Myc/Bin1 interaction and suggest a mode of regulation that may be important for c-Myc function as a regulator of gene transcription.

---

Organizational Affiliation: 

Ontario Cancer Institute and Department of Medical Biophysics, University of Toronto, 610 University Avenue, Toronto, Ont., Canada M5G 2M9.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Myc box dependent interacting protein 1	A	81	Homo sapiens	Mutation(s): 0  Gene Names: BIN1, AMPHL
Find proteins for O00499 (Homo sapiens) Explore O00499  Go to UniProtKB:  O00499
NIH Common Fund Data Resources
PHAROS:  O00499 GTEx:  ENSG00000136717

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1MUZ Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-09-24 
• Released Date: 2003-09-30 
Deposition Author(s): Pineda-Lucena, A., Arrowsmith, C.H.

Revision History  

• Version 1.0: 2003-09-30
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance