3IBV

Karyopherin cytosolic state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.275 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures of the tRNA export factor in the nuclear and cytosolic states

Cook, A.G.Fukuhara, N.Jinek, M.Conti, E.

(2009) Nature 461: 60-65

  • DOI: 10.1038/nature08394
  • Primary Citation of Related Structures:  
    3IBV, 3ICQ

  • PubMed Abstract: 
  • Transfer RNAs are among the most ubiquitous molecules in cells, central to decoding information from messenger RNAs on translating ribosomes. In eukaryotic cells, tRNAs are actively transported from their site of synthesis in the nucleus to their site of function in the cytosol ...

    Transfer RNAs are among the most ubiquitous molecules in cells, central to decoding information from messenger RNAs on translating ribosomes. In eukaryotic cells, tRNAs are actively transported from their site of synthesis in the nucleus to their site of function in the cytosol. This is mediated by a dedicated nucleo-cytoplasmic transport factor of the karyopherin-beta family (Xpot, also known as Los1 in Saccharomyces cerevisiae). Here we report the 3.2 A resolution structure of Schizosaccharomyces pombe Xpot in complex with tRNA and RanGTP, and the 3.1 A structure of unbound Xpot, revealing both nuclear and cytosolic snapshots of this transport factor. Xpot undergoes a large conformational change on binding cargo, wrapping around the tRNA and, in particular, binding to the tRNA 5' and 3' ends. The binding mode explains how Xpot can recognize all mature tRNAs in the cell and yet distinguish them from those that have not been properly processed, thus coupling tRNA export to quality control.


    Organizational Affiliation

    Structural Cell Biology, MPI for Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Exportin-TA, B980Schizosaccharomyces pombeMutation(s): 0 
Gene Names: los1SPBP8B7.09c
Find proteins for O94258 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore O94258 
Go to UniProtKB:  O94258
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.275 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 119.9α = 90
b = 130.1β = 90
c = 173.9γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
CNSrefinement
PDB_EXTRACTdata extraction
XDSdata scaling
XDSdata reduction
SHELXSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance