6P6A

Structure of Mouse Importin alpha - NIT2 NLS peptide complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.167 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Comparative study of the interactions between fungal transcription factor nuclear localization sequences with mammalian and fungal importin-alpha.

Bernardes, N.E.Fukuda, C.A.da Silva, T.D.de Oliveira, H.C.de Barros, A.C.Dreyer, T.R.Bertolini, M.C.Fontes, M.R.M.

(2020) Sci Rep 10: 1458-1458

  • DOI: https://doi.org/10.1038/s41598-020-58316-9
  • Primary Citation of Related Structures:  
    6P6A, 6P6E

  • PubMed Abstract: 

    Importin-α (Impα) is an adaptor protein that binds to cargo proteins (containing Nuclear Localization Sequences - NLSs), for their translocation to the nucleus. The specificities of the Impα/NLS interactions have been studied, since these features could be used as important tools to find potential NLSs in nuclear proteins or even for the development of targets to inhibit nuclear import or to design peptides for drug delivery. Few structural studies have compared different Impα variants from the same organism or Impα of different organisms. Previously, we investigated nuclear transport of transcription factors with Neurospora crassa Impα (NcImpα). Herein, NIT-2 and PAC-3 transcription factors NLSs were studied in complex with Mus musculus Impα (MmImpα). Calorimetric assays demonstrated that the PAC-3 NLS peptide interacts with both Impα proteins with approximately the same affinity. The NIT-2 NLS sequence binds with high affinity to the Impα major binding site from both organisms, but its binding to minor binding sites reveals interesting differences due to the presence of additional interactions of NIT-2-NLS with MmImpα. These findings, together with previous results with Impα from other organisms, indicate that the differential affinity of NLSs to minor binding sites may be also responsible for the selectivity of some cargo proteins recognition and transport.


  • Organizational Affiliation

    Departamento de Física e Biofísica, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Importin subunit alpha-1A [auth B]460Mus musculusMutation(s): 0 
Gene Names: Kpna2Rch1
UniProt & NIH Common Fund Data Resources
Find proteins for P52293 (Mus musculus)
Explore P52293 
Go to UniProtKB:  P52293
IMPC:  MGI:103561
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP52293
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Nitrogen catabolic enzyme regulatory proteinB [auth A],
C
13Neurospora crassa OR74AMutation(s): 0 
UniProt
Find proteins for P19212 (Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987))
Explore P19212 
Go to UniProtKB:  P19212
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19212
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.167 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.678α = 90
b = 90.18β = 90
c = 99.181γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata scaling
PHENIXphasing
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Sao Paulo Research Foundation (FAPESP)Brazil2013/24705-3

Revision History  (Full details and data files)

  • Version 1.0: 2020-01-29
    Type: Initial release
  • Version 1.1: 2020-02-12
    Changes: Database references
  • Version 1.2: 2023-10-11
    Changes: Data collection, Database references, Refinement description