1W9C

Proteolytic fragment of CRM1 spanning six C-terminal HEAT repeats


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Architecture of Crm1-Exportin 1 Suggests How Cooperativity is Achieved During Formation of a Nuclear Export Complex

Petosa, C.Schoehn, G.Askjaer, P.Bauer, U.Moulin, M.Steuerwald, U.Soler-Lopez, M.Baudin, F.Mattaj, I.W.Muller, C.W.

(2004) Mol.Cell 16: 761

  • DOI: 10.1016/j.molcel.2004.11.018

  • PubMed Abstract: 
  • CRM1/Exportin1 mediates the nuclear export of proteins bearing a leucine-rich nuclear export signal (NES) by forming a cooperative ternary complex with the NES-bearing substrate and the small GTPase Ran. We present a structural model of human CRM1 ba ...

    CRM1/Exportin1 mediates the nuclear export of proteins bearing a leucine-rich nuclear export signal (NES) by forming a cooperative ternary complex with the NES-bearing substrate and the small GTPase Ran. We present a structural model of human CRM1 based on a combination of X-ray crystallography, homology modeling, and electron microscopy. The architecture of CRM1 resembles that of the import receptor transportin1, with 19 HEAT repeats and a large loop implicated in Ran binding. Residues critical for NES recognition are identified adjacent to the cysteine residue targeted by leptomycin B (LMB), a specific CRM1 inhibitor. We present evidence that a conformational change of the Ran binding loop accounts for the cooperativity of Ran- and substrate binding and for the selective enhancement of CRM1-mediated export by the cofactor RanBP3. Our findings indicate that a single architectural and mechanistic framework can explain the divergent effects of RanGTP on substrate binding by many import and export receptors.


    Organizational Affiliation

    European Molecular Biology Laboratory, Grenoble Outstation, B.P. 181, 38042 Grenoble Cedex 9, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CRM1 PROTEIN
A, B
321Homo sapiensMutation(s): 0 
Gene Names: XPO1 (CRM1)
Find proteins for O14980 (Homo sapiens)
Go to Gene View: XPO1
Go to UniProtKB:  O14980
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.229 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 118.870α = 90.00
b = 62.870β = 90.00
c = 114.660γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
CNSrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-12-03
    Type: Initial release
  • Version 1.1: 2012-11-14
    Type: Derived calculations, Non-polymer description, Other, Refinement description, Version format compliance