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 

wwPDB Validation 3D Report Full Report


This is version 1.1 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:  

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RNA-BINDING PROTEIN 8A
A, C
165Drosophila melanogasterMutation(s): 0 
Gene Names: tsu (Y14)
Find proteins for Q9V535 (Drosophila melanogaster)
Go to UniProtKB:  Q9V535
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTEIN MAGO NASHI
B, D
147Drosophila melanogasterMutation(s): 0 
Gene Names: mago (mgn)
Find proteins for P49028 (Drosophila melanogaster)
Go to UniProtKB:  P49028
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
CADMUS
F, G
971Drosophila melanogasterMutation(s): 0 
Gene Names: cdm (3R23, CG 7212, Dmel\CG7212, Imp13, imp13, sd-5)
Find proteins for Q9VEC5 (Drosophila melanogaster)
Go to UniProtKB:  Q9VEC5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.289 
  • R-Value Work: 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
PHASERphasing
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-16
    Type: Initial release
  • Version 1.1: 2014-11-19
    Type: Data collection, Refinement description, Source and taxonomy, Version format compliance