5K8I

Crystal structure of ZIKV NS3 helicase in complex with ATP and Mn2+


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.69 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.181 

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This is version 1.5 of the entry. See complete history


Literature

Molecular mechanism of divalent-metal-induced activation of NS3 helicase and insights into Zika virus inhibitor design.

Cao, X.Li, Y.Jin, X.Li, Y.Guo, F.Jin, T.

(2016) Nucleic Acids Res 44: 10505-10514

  • DOI: https://doi.org/10.1093/nar/gkw941
  • Primary Citation of Related Structures:  
    5JWH, 5K8I, 5K8L, 5K8T, 5K8U

  • PubMed Abstract: 

    Zika virus has attracted increasing attention because of its potential for causing human neural disorders, including microcephaly in infants and Guillain-Barré syndrome. Its NS3 helicase domain plays critical roles in NTP-dependent RNA unwinding and translocation during viral replication. Our structural analysis revealed a pre-activation state of NS3 helicase in complex with GTPγS, in which the triphosphate adopts a compact conformation in the absence of any divalent metal ions. In contrast, in the presence of a divalent cation, GTPγS adopts an extended conformation, and the Walker A motif undergoes substantial conformational changes. Both features contribute to more extensive interactions between the GTPγS and the enzyme. Thus, this study provides structural evidence on the allosteric modulation of MgNTP 2- on the NS3 helicase activity. Furthermore, the compact conformation of inhibitory NTP identified in this study provides precise information for the rational drug design of small molecule inhibitors for the treatment of ZIKV infection.


  • Organizational Affiliation

    Laboratory of Structural Immunology, CAS Key Laboratory of Innate Immunity and Chronic Disease, CAS Center for Excellence in Molecular Cell Science, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, Anhui 230027, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ZIKV NS3 helicase458Zika virusMutation(s): 0 
UniProt
Find proteins for A0A146CJG7 (Zika virus)
Explore A0A146CJG7 
Go to UniProtKB:  A0A146CJG7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A146CJG7
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.69 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.181 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.51α = 90
b = 53.17β = 105.31
c = 65.11γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-11-09
    Type: Initial release
  • Version 1.1: 2017-10-04
    Changes: Data collection, Database references, Derived calculations
  • Version 1.2: 2017-10-11
    Changes: Data collection
  • Version 1.3: 2017-12-06
    Changes: Database references
  • Version 1.4: 2021-06-09
    Changes: Derived calculations, Structure summary
  • Version 1.5: 2024-03-20
    Changes: Data collection, Database references