1W9C

Proteolytic fragment of CRM1 spanning six C-terminal HEAT repeats

• PDB DOI:  https://doi.org/10.2210/pdb1W9C/pdb

• Classification: NUCLEAR PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-10-08 Released: 2004-12-03 
• Deposition Author(s): Petosa, C., Schoehn, G., Askjaer, P., Bauer, U., Moulin, M., Steuerwald, U., Soler-Lopez, M., Baudin, F., Mattaj, I.W., Muller, C.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.277 
• R-Value Work: 0.229 
• R-Value Observed: 0.229 

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

• PubMed: 15574331 
• DOI: https://doi.org/10.1016/j.molcel.2004.11.018
• Primary Citation of Related Structures:  
  1W9C


• 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 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.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 72.54 kDa 
• Atom Count: 5,300 
• Modelled Residue Count: 642 
• Deposited Residue Count: 642 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CRM1 PROTEIN	A, B	321	Homo sapiens	Mutation(s): 0  Gene Names: XPO1, CRM1
UniProt & NIH Common Fund Data Resources
Find proteins for O14980 (Homo sapiens) Explore O14980  Go to UniProtKB:  O14980
PHAROS:  O14980

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.277 
• R-Value Work: 0.229 
• R-Value Observed: 0.229 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 118.87	α = 90
b = 62.87	β = 90
c = 114.66	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-12-03 
Deposition Author(s): Petosa, C., Schoehn, G., Askjaer, P., Bauer, U., Moulin, M., Steuerwald, U., Soler-Lopez, M., Baudin, F., Mattaj, I.W., Muller, C.W.

Revision History  

• Version 1.0: 2004-12-03
  Type: Initial release
  
• Version 1.1: 2012-11-14
  Changes: Derived calculations, Non-polymer description, Other, Refinement description, Version format compliance
• Version 1.2: 2019-11-13
  Changes: Data collection, Database references, Other