2X19

Crystal structure of Importin13 - RanGTP complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.236 

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This is version 1.4 of the entry. See complete history


Literature

Nuclear Import Mechanism of the Ejc Component Mago- Y14 Revealed by Structural Studies of Importin 13.

Bono, F.Cook, A.G.Grunwald, M.Ebert, J.Conti, E.

(2010) Mol Cell 37: 211

  • DOI: https://doi.org/10.1016/j.molcel.2010.01.007
  • Primary Citation of Related Structures:  
    2X19, 2X1G

  • PubMed Abstract: 

    Mago and Y14 are core components of the exon junction complex (EJC), an assembly central to nonsense-mediated mRNA decay in humans and mRNA localization in flies. The Mago-Y14 heterodimer shuttles between the nucleus, where it is loaded onto specific mRNAs, and the cytoplasm, where it functions in translational regulation. The heterodimer is imported back into the nucleus by Importin 13 (Imp13), a member of the karyopherin-beta family of transport factors. We have elucidated the structural basis of the Mago-Y14 nuclear import cycle. The 3.35 A structure of the Drosophila Imp13-Mago-Y14 complex shows that Imp13 forms a ring-like molecule, reminiscent of Crm1, and encircles the Mago-Y14 cargo with a conserved interaction surface. The 2.8 A structure of human Imp13 bound to RanGTP reveals how Mago-Y14 is released in the nucleus by a steric hindrance mechanism. Comparison of the two structures suggests how this unusual karyopherin might function in bidirectional nucleocytoplasmic transport.


  • Organizational Affiliation

    Max-Planck-Institute of Biochemistry, Department of Structural Cell Biology, Am Klopferspitz 18, 82152 Martinsried, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GTP-BINDING NUCLEAR PROTEIN GSP1/CNR1172Saccharomyces cerevisiaeMutation(s): 1 
UniProt
Find proteins for P32835 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32835 
Go to UniProtKB:  P32835
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP32835
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
IMPORTIN-13963Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O94829 (Homo sapiens)
Explore O94829 
Go to UniProtKB:  O94829
PHAROS:  O94829
GTEx:  ENSG00000117408 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO94829
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.236 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.93α = 90
b = 99.93β = 90
c = 276.84γ = 120
Software Package:
Software NamePurpose
CNSrefinement
XDSdata reduction
XSCALEdata scaling
SHELXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-16
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-06-28
    Changes: Refinement description
  • Version 1.4: 2024-10-16
    Changes: Data collection, Database references, Derived calculations, Other, Structure summary