2JLW

Dengue virus 4 NS3 helicase in complex with ssRNA2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.202 

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

Insights Into RNA Unwinding and ATP Hydrolysis by the Flavivirus Ns3 Protein

Luo, D.H.Xu, T.Watson, R.P.Becker, D.S.Sampath, A.Jahnke, W.Yeong, S.S.Wang, C.H.Lim, S.P.Strongin, A.Vasudevan, S.G.Lescar, J.

(2008) EMBO J 27: 3209

  • DOI: https://doi.org/10.1038/emboj.2008.232
  • Primary Citation of Related Structures:  
    2JLQ, 2JLR, 2JLS, 2JLU, 2JLV, 2JLW, 2JLX, 2JLY, 2JLZ

  • PubMed Abstract: 

    Together with the NS5 polymerase, the NS3 helicase has a pivotal function in flavivirus RNA replication and constitutes an important drug target. We captured the dengue virus NS3 helicase at several stages along the catalytic pathway including bound to single-stranded (ss) RNA, to an ATP analogue, to a transition-state analogue and to ATP hydrolysis products. RNA recognition appears largely sequence independent in a way remarkably similar to eukaryotic DEAD box proteins Vasa and eIF4AIII. On ssRNA binding, the NS3 enzyme switches to a catalytic-competent state imparted by an inward movement of the P-loop, interdomain closure and a change in the divalent metal coordination shell, providing a structural basis for RNA-stimulated ATP hydrolysis. These structures demonstrate for the first time large quaternary changes in the flaviviridae helicase, identify the catalytic water molecule and point to a beta-hairpin that protrudes from subdomain 2, as a critical element for dsRNA unwinding. They also suggest how NS3 could exert an effect as an RNA-anchoring device and thus participate both in flavivirus RNA replication and assembly.


  • Organizational Affiliation

    Structural & Computational Biology Division, School of Biological Sciences, Nanyang Technological University, Singapore.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SERINE PROTEASE SUBUNIT NS3
A, B
451Dengue virus 4 Thailand/0348/1991Mutation(s): 0 
EC: 3.4.21.91
UniProt
Find proteins for Q2YHF0 (Dengue virus type 4 (strain Thailand/0348/1991))
Explore Q2YHF0 
Go to UniProtKB:  Q2YHF0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2YHF0
Sequence Annotations
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  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains LengthOrganismImage
5'-R(*UP*AP*GP*AP*CP*UP*AP*AP*CP*AP*AP*CP*U)-3'
C, D
13N/A
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.202 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 132.432α = 90
b = 104.628β = 117.67
c = 72.317γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-11-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description