3ZJY

Crystal Structure of Importin 13 - RanGTP - eIF1A complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.256 
  • R-Value Observed: 0.258 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural Basis for the Nuclear Export Activity of Importin13.

Grunwald, M.Lazzaretti, D.Bono, F.

(2013) EMBO J 32: 899

  • DOI: 10.1038/emboj.2013.29
  • Primary Citation of Related Structures:  
    3ZKV, 3ZJY

  • PubMed Abstract: 
  • Importin13 (Imp13) is a bidirectional karyopherin that can mediate both import and export of cargoes. Imp13 recognizes several import cargoes, which include the exon junction complex components Mago-Y14 and the E2 SUMO-conjugating enzyme Ubc9, and one known export cargo, the translation initiation factor 1A (eIF1A) ...

    Importin13 (Imp13) is a bidirectional karyopherin that can mediate both import and export of cargoes. Imp13 recognizes several import cargoes, which include the exon junction complex components Mago-Y14 and the E2 SUMO-conjugating enzyme Ubc9, and one known export cargo, the translation initiation factor 1A (eIF1A). To understand how Imp13 can perform double duty, we determined the 3.6-Å crystal structure of Imp13 in complex with RanGTP and with eIF1A. eIF1A binds at the inner surface of the Imp13 C-terminal arch adjacent and concomitantly to RanGTP illustrating how eIF1A can be exported by Imp13. Moreover, the 3.0-Å structure of Imp13 in its unbound state reveals the existence of an open conformation in the cytoplasm that explains export cargo release and completes the export branch of the Imp13 pathway. Finally, we demonstrate that Imp13 is able to bind and export eIF1A in vivo and that its function is essential.


    Organizational Affiliation

    Max Planck Institute for Developmental Biology, Tübingen, Germany.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GTP-BINDING NUCLEAR PROTEIN RANA, D, F180Homo sapiensMutation(s): 1 
Gene Names: RANARA24OK/SW-cl.81
Find proteins for P62826 (Homo sapiens)
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Go to UniProtKB:  P62826
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PHAROS:  P62826
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
IMPORTIN-13B, E, G963Homo sapiensMutation(s): 0 
Gene Names: IPO13KIAA0724RANBP13
Find proteins for O94829 (Homo sapiens)
Explore O94829 
Go to UniProtKB:  O94829
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PHAROS:  O94829
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
EUKARYOTIC TRANSLATION INITIATION FACTOR 1A, X-CHROMOSOMALC112Homo sapiensMutation(s): 0 
Gene Names: EIF1AXEIF1AEIF4C
Find proteins for P47813 (Homo sapiens)
Explore P47813 
Go to UniProtKB:  P47813
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PHAROS:  P47813
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.256 
  • R-Value Observed: 0.258 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 186.5α = 90
b = 100.4β = 90.91
c = 274.72γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-04-10
    Type: Initial release