Importin alpha 3 in cargo free state

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.251 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Structural basis for importin alpha 3 specificity of W proteins in Hendra and Nipah viruses.

Smith, K.M.Tsimbalyuk, S.Edwards, M.R.Cross, E.M.Batra, J.Soares da Costa, T.P.Aragao, D.Basler, C.F.Forwood, J.K.

(2018) Nat Commun 9: 3703-3703

  • DOI: https://doi.org/10.1038/s41467-018-05928-5
  • Primary Citation of Related Structures:  
    6BVT, 6BVV, 6BVZ, 6BW0, 6BW1, 6BW9, 6BWA, 6BWB

  • PubMed Abstract: 

    Seven human isoforms of importin α mediate nuclear import of cargo in a tissue- and isoform-specific manner. How nuclear import adaptors differentially interact with cargo harbouring the same nuclear localisation signal (NLS) remains poorly understood, as the NLS recognition region is highly conserved. Here, we provide a structural basis for the nuclear import specificity of W proteins in Hendra and Nipah viruses. We determine the structural interfaces of these cargo bound to importin α1 and α3, identifying a 2.4-fold more extensive interface and > 50-fold higher binding affinity for importin α3. Through the design of importin α1 and α3 chimeric and mutant proteins, together with structures of cargo-free importin α1 and α3 isoforms, we establish that the molecular basis of specificity resides in the differential positioning of the armadillo repeats 7 and 8. Overall, our study provides mechanistic insights into a range of important nucleocytoplasmic transport processes reliant on isoform adaptor specificity.

  • Organizational Affiliation

    Center for Microbial Pathogenesis, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, 30303, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Importin subunit alpha-3459Homo sapiensMutation(s): 0 
Gene Names: KPNA4QIP1
UniProt & NIH Common Fund Data Resources
Find proteins for O00629 (Homo sapiens)
Explore O00629 
Go to UniProtKB:  O00629
PHAROS:  O00629
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO00629
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.251 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.118α = 90
b = 53.229β = 92.86
c = 91.309γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Australian Research Council (ARC)Australia--

Revision History  (Full details and data files)

  • Version 1.0: 2018-07-04
    Type: Initial release
  • Version 1.1: 2019-01-16
    Changes: Data collection, Database references
  • Version 1.2: 2019-02-20
    Changes: Author supporting evidence, Data collection
  • Version 1.3: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.4: 2023-03-29
    Changes: Database references, Structure summary