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 

wwPDB Validation   3D Report Full Report


This is version 1.3 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:  
    2X1G, 2X19

  • 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
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GTP-BINDING NUCLEAR PROTEIN GSP1/CNR1A172Saccharomyces cerevisiaeMutation(s): 1 
Find proteins for P32835 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32835 
Go to UniProtKB:  P32835
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
IMPORTIN-13B963Homo sapiensMutation(s): 0 
Gene Names: IPO13KIAA0724RANBP13
Find proteins for O94829 (Homo sapiens)
Explore O94829 
Go to UniProtKB:  O94829
NIH Common Fund Data Resources
PHAROS:  O94829
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP

Download Ideal Coordinates CCD File 
C [auth A]GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
D [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
BL-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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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