2X1G

Crystal structure of Importin13 - Mago-Y14 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.267 
  • R-Value Observed: 0.267 

wwPDB Validation   3D Report Full Report


This is version 1.2 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: 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 ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RNA-BINDING PROTEIN 8AA, C165Drosophila melanogasterMutation(s): 0 
Gene Names: tsuY14CG8781
UniProt
Find proteins for Q9V535 (Drosophila melanogaster)
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Go to UniProtKB:  Q9V535
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UniProt GroupQ9V535
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN MAGO NASHIB, D147Drosophila melanogasterMutation(s): 0 
Gene Names: magomgnCG9401
UniProt
Find proteins for P49028 (Drosophila melanogaster)
Explore P49028 
Go to UniProtKB:  P49028
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UniProt GroupP49028
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
CADMUSE [auth F],
F [auth G]
971Drosophila melanogasterMutation(s): 0 
Gene Names: cdm3R23CdmCG 7212Dmel\CG7212Imp13imp13sd-5CG7212Dmel_CG7212
UniProt
Find proteins for Q9VEC5 (Drosophila melanogaster)
Explore Q9VEC5 
Go to UniProtKB:  Q9VEC5
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UniProt GroupQ9VEC5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.267 
  • R-Value Observed: 0.267 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.569α = 89.83
b = 100.792β = 110.18
c = 93.923γ = 90.63
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-16
    Type: Initial release
  • Version 1.1: 2014-11-19
    Changes: Data collection, Refinement description, Source and taxonomy, Version format compliance
  • Version 1.2: 2019-10-16
    Changes: Data collection, Experimental preparation, Other