3VYC

Crystal structure of unliganded Saccharomyces cerevisiae CRM1 (Xpo1p)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A 2.1- angstrom -resolution crystal structure of unliganded CRM1 reveals the mechanism of autoinhibition

Saito, N.Matsuura, Y.

(2013) J.Mol.Biol. 425: 350-364

  • DOI: 10.1016/j.jmb.2012.11.014

  • PubMed Abstract: 
  • CRM1 mediates nuclear export of numerous proteins and ribonucleoproteins containing a leucine-rich nuclear export signal (NES). Binding of RanGTP to CRM1 in the nucleus stabilizes cargo association with CRM1, and vice versa, but the mechanism underly ...

    CRM1 mediates nuclear export of numerous proteins and ribonucleoproteins containing a leucine-rich nuclear export signal (NES). Binding of RanGTP to CRM1 in the nucleus stabilizes cargo association with CRM1, and vice versa, but the mechanism underlying the positive cooperativity in RanGTP and NES binding to CRM1 remains incompletely understood. Herein we report a 2.1-Å-resolution crystal structure of unliganded Saccharomyces cerevisiae CRM1 (Xpo1p) that demonstrates that an internal loop of CRM1 (referred to as HEAT9 loop) is primarily responsible for maintaining the NES-binding cleft in a closed conformation, rendering CRM1 incapable of NES binding in the absence of RanGTP. The structure also shows that the C-terminal tail of CRM1 stabilizes the autoinhibitory conformation of the HEAT9 loop and thereby reinforces autoinhibition. Comparison with the structures of CRM1-NES-RanGTP complexes reveals how binding of RanGTP is associated with a series of allosteric conformational changes in CRM1 that lead to opening of the NES-binding cleft, allowing for stable binding of NES cargoes.


    Organizational Affiliation

    Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Exportin-1
A
1033Saccharomyces 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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.187 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 116.782α = 90.00
b = 116.782β = 90.00
c = 118.980γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
SOLVEphasing
MOSFLMdata reduction
PDB_EXTRACTdata extraction
REFMACrefinement
BSSdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-11-28
    Type: Initial release
  • Version 1.1: 2013-09-04
    Type: Database references