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 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.257 

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

  • 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 protein
A
125Homo sapiensGene Names: APC (DP2.5)
Find proteins for P25054 (Homo sapiens)
Go to Gene View: APC
Go to UniProtKB:  P25054
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.257 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 46.047α = 90.00
b = 46.047β = 90.00
c = 113.299γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
XDSdata scaling
CNSphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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