5XOJ

Crystal structure of Xpo1p-PKI-Nup42p-Gsp1p-GTP complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.191 

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Literature

Crystal structure of the Xpo1p nuclear export complex bound to the SxFG/PxFG repeats of the nucleoporin Nup42p

Koyama, M., Hirano, H., Shirai, N., Matsuura, Y.

(2017) Genes Cells 22: 861-875

  • DOI: 10.1111/gtc.12520

  • PubMed Abstract: 

    • Xpo1p (yeast CRM1) is the major nuclear export receptor that carries a plethora of proteins and ribonucleoproteins from the nucleus to cytoplasm. The passage of the Xpo1p nuclear export complex through nuclear pore complexes (NPCs) is facilitated by ...

    Xpo1p (yeast CRM1) is the major nuclear export receptor that carries a plethora of proteins and ribonucleoproteins from the nucleus to cytoplasm. The passage of the Xpo1p nuclear export complex through nuclear pore complexes (NPCs) is facilitated by interactions with nucleoporins (Nups) containing extensive repeats of phenylalanine-glycine (so-called FG repeats), although the precise role of each Nup in the nuclear export reaction remains incompletely understood. Here we report structural and biochemical characterization of the interactions between the Xpo1p nuclear export complex and the FG repeats of Nup42p, a nucleoporin localized at the cytoplasmic face of yeast NPCs and has characteristic SxFG/PxFG sequence repeat motif. The crystal structure of Xpo1p-PKI-Nup42p-Gsp1p-GTP complex identified three binding sites for the SxFG/PxFG repeats on HEAT repeats 14-20 of Xpo1p. Mutational analyses of Nup42p showed that the conserved serines and prolines in the SxFG/PxFG repeats contribute to Xpo1p-Nup42p binding. Our structural and biochemical data suggest that SxFG/PxFG-Nups such as Nup42p and Nup159p at the cytoplasmic face of NPCs provide high-affinity docking sites for the Xpo1p nuclear export complex in the terminal stage of NPC passage and that subsequent disassembly of the nuclear export complex facilitates recycling of free Xpo1p back to the nucleus.

    Organizational Affiliation: 

    Division of Biological Science, Nagoya University, Nagoya, 464-8602, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GTP-binding nuclear protein
A
182Saccharomyces cerevisiae (strain AWRI796)Mutation(s): 1 
Find proteins for A0A3F3F7D8 (Saccharomyces cerevisiae (strain AWRI796))
Go to UniProtKB:  A0A3F3F7D8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Exportin-1
C
1047Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: CRM1 (KAP124, XPO1)
Find proteins for P30822 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P30822
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
cAMP-dependent protein kinase inhibitor alpha
D
76Homo sapiensMutation(s): 1 
Gene Names: PKIA (PRKACN1)
Find proteins for P61925 (Homo sapiens)
Go to Gene View: PKIA
Go to UniProtKB:  P61925
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Nup42p
E, F, G
35Saccharomyces cerevisiae (strain FostersB)Mutation(s): 0 
Find proteins for A0A3F3EMG5 (Saccharomyces cerevisiae (strain FostersB))
Go to UniProtKB:  A0A3F3EMG5
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP
Download SDF File 
Download CCD File 
A
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
MG
Query on MG
Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 101.640α = 90.00
b = 107.560β = 90.00
c = 149.110γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
Aimlessdata scaling
PDB_EXTRACTdata extraction
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-08-16
    Type: Initial release
  • Version 1.1: 2017-11-01
    Type: Database references