4MZ5

Structure of importin-alpha: dUTPase NLS complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.200 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Phosphorylation adjacent to the nuclear localization signal of human dUTPase abolishes nuclear import: structural and mechanistic insights.

Rona, G.Marfori, M.Borsos, M.Scheer, I.Takacs, E.Toth, J.Babos, F.Magyar, A.Erdei, A.Bozoky, Z.Buday, L.Kobe, B.Vertessy, B.G.

(2013) Acta Crystallogr D Biol Crystallogr 69: 2495-2505

  • DOI: 10.1107/S0907444913023354
  • Primary Citation of Related Structures:  
    4MZ5, 4MZ6

  • PubMed Abstract: 
  • Phosphorylation adjacent to nuclear localization signals (NLSs) is involved in the regulation of nucleocytoplasmic transport. The nuclear isoform of human dUTPase, an enzyme that is essential for genomic integrity, has been shown to be phosphorylated on a serine residue (Ser11) in the vicinity of its nuclear localization signal; however, the effect of this phosphorylation is not yet known ...

    Phosphorylation adjacent to nuclear localization signals (NLSs) is involved in the regulation of nucleocytoplasmic transport. The nuclear isoform of human dUTPase, an enzyme that is essential for genomic integrity, has been shown to be phosphorylated on a serine residue (Ser11) in the vicinity of its nuclear localization signal; however, the effect of this phosphorylation is not yet known. To investigate this issue, an integrated set of structural, molecular and cell biological methods were employed. It is shown that NLS-adjacent phosphorylation of dUTPase occurs during the M phase of the cell cycle. Comparison of the cellular distribution of wild-type dUTPase with those of hyperphosphorylation- and hypophosphorylation-mimicking mutants suggests that phosphorylation at Ser11 leads to the exclusion of dUTPase from the nucleus. Isothermal titration microcalorimetry and additional independent biophysical techniques show that the interaction between dUTPase and importin-α, the karyopherin molecule responsible for `classical' NLS binding, is weakened significantly in the case of the S11E hyperphosphorylation-mimicking mutant. The structures of the importin-α-wild-type and the importin-α-hyperphosphorylation-mimicking dUTPase NLS complexes provide structural insights into the molecular details of this regulation. The data indicate that the post-translational modification of dUTPase during the cell cycle may modulate the nuclear availability of this enzyme.


    Organizational Affiliation

    Institute of Enzymology, RCNS, Hungarian Academy of Sciences, 1113 Budapest, Hungary.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Deoxyuridine 5'-triphosphate nucleotidohydrolase, mitochondrialA, B [auth C]13Homo sapiensMutation(s): 0 
Gene Names: DUT
EC: 3.6.1.23
UniProt & NIH Common Fund Data Resources
Find proteins for P33316 (Homo sapiens)
Explore P33316 
Go to UniProtKB:  P33316
PHAROS:  P33316
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Importin subunit alpha-1C [auth E]509Mus 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
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.876α = 90
b = 89.995β = 90
c = 99.729γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-11-13
    Type: Initial release
  • Version 1.1: 2013-11-20
    Changes: Derived calculations
  • Version 1.2: 2013-12-11
    Changes: Database references
  • Version 1.3: 2014-09-24
    Changes: Database references