1M5I

Crystal Structure of the coiled coil region 129-250 of the tumor suppressor gene product APC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.262 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The coiled coil region (amino acids 129-250) of the tumor suppressor protein adenomatous polyposis coli (APC). Its structure and its interaction with chromosome maintenance region 1 (Crm-1).

Tickenbrock, L.Cramer, J.Vetter, I.R.Muller, O.

(2002) J Biol Chem 277: 32332-32338

  • DOI: 10.1074/jbc.M203990200
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The APC (adenomatous polyposis coli) tumor suppressor protein has many different intracellular functions including a nuclear export activity. Only little is known about the molecular architecture of the 2843-amino acid APC protein. Guided by secondar ...

    The APC (adenomatous polyposis coli) tumor suppressor protein has many different intracellular functions including a nuclear export activity. Only little is known about the molecular architecture of the 2843-amino acid APC protein. Guided by secondary structure predictions we identified a fragment close to the N-terminal end, termed APC-(129-250), as a soluble and protease-resistant domain. We solved the crystal structure of APC-(129-250), which is monomeric and consists of three alpha-helices forming two separate antiparallel coiled coils. APC-(129-250) includes the nuclear export signal NES-(165-174) at the C-terminal end of the first helix. Surprisingly, the conserved hydrophobic amino acids of NES-(165-174) are buried in one of the coiled coils and are thus not accessible for interaction with other proteins. We demonstrate the direct interaction of APC-(129-250) with the nuclear export factor chromosome maintenance region 1 (Crm-1). This interaction is enhanced by the small GTPase Ran in its activated GTP-bound form and also by a double mutation in APC-(129-250), which deletes two amino acids forming two of the major interhelical interactions within the coiled coil. These observations hint to a regulatory mechanism of the APC nuclear export activity by NES masking.


    Related Citations: 
    • The ABC of APC
      Fearnhead, N.S., Britton, M.P., Bodmer, W.F.
      (2001) Hum Mol Genet 10: 721

    Organizational Affiliation

    Max-Planck-Institut für molekulare Physiologie, Abteilung Strukturelle Biologie, Otto-Hahn-Strasse 11, D-44227 Dortmund, Germany.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
APC proteinA125Homo sapiensMutation(s): 0 
Gene Names: APCDP2.5
Find proteins for P25054 (Homo sapiens)
Explore P25054 
Go to UniProtKB:  P25054
NIH Common Fund Data Resources
PHAROS  P25054
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.262 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.047α = 90
b = 46.047β = 90
c = 113.299γ = 120
Software Package:
Software NamePurpose
XDSdata scaling
XDSdata reduction
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-11-20
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance