1Z3H

The exportin Cse1 in its cargo-free, cytoplasmic state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.241 
  • R-Value Observed: 0.287 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The structure of the nuclear export receptor cse1 in its cytosolic state reveals a closed conformation incompatible with cargo binding

Cook, A.Fernandez, E.Lindner, D.Ebert, J.Schlenstedt, G.Conti, E.

(2005) Mol Cell 18: 355-367

  • DOI: 10.1016/j.molcel.2005.03.021
  • Primary Citation of Related Structures:  
    1Z3H

  • PubMed Abstract: 
  • Cse1 mediates nuclear export of importin alpha, the nuclear localization signal (NLS) import adaptor. We report the 3.1 A resolution structure of cargo-free Cse1, representing this HEAT repeat protein in its cytosolic state. Cse1 is compact, consisting of N- and C-terminal arches that interact to form a ring ...

    Cse1 mediates nuclear export of importin alpha, the nuclear localization signal (NLS) import adaptor. We report the 3.1 A resolution structure of cargo-free Cse1, representing this HEAT repeat protein in its cytosolic state. Cse1 is compact, consisting of N- and C-terminal arches that interact to form a ring. Comparison with the structure of cargo-bound Cse1 shows a major conformational change leading to opening of the structure upon cargo binding. The largest structural changes occur within a hinge region centered at HEAT repeat 8. This repeat contains a conserved insertion that connects the RanGTP and importin alpha contact sites and that is essential for binding. In the cargo-free state, the RanGTP binding sites are occluded and the importin alpha sites are distorted. Mutations that destabilize the N- to C-terminal interaction uncouple importin alpha and Ran binding, suggesting that the closed conformation prevents association with importin alpha.


    Organizational Affiliation

    European Molecular Biology Laboratory, Meyerhofstrasse 1, D-69117 Heidelberg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Importin alpha re-exporterA, B968Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: CSE1
Find proteins for P33307 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P33307 
Go to UniProtKB:  P33307
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.241 
  • R-Value Observed: 0.287 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 162.52α = 90
b = 113.04β = 90
c = 122.97γ = 90
Software Package:
Software NamePurpose
SHARPphasing
SOLOMONphasing
CNSrefinement
PDB_EXTRACTdata extraction
MOSFLMdata reduction
CCP4data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-05-10
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance