5GJB

Zika virus NS3 helicase in complex with ssRNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.702 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.154 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of Zika virus helicase in recognizing its substrates

Tian, H.L.Ji, X.Y.Yang, X.Y.Zhang, Z.X.Lu, Z.K.Yang, K.L.Chen, C.Zhao, Q.Chi, H.Mu, Z.Y.Xie, W.Wang, Z.F.Lou, H.Q.Yang, H.T.Rao, Z.H.

(2016) Protein Cell 7: 562-570

  • DOI: 10.1007/s13238-016-0293-2
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The recent explosive outbreak of Zika virus (ZIKV) infection has been reported in South and Central America and the Caribbean. Neonatal microcephaly associated with ZIKV infection has already caused a public health emergency of international concern. ...

    The recent explosive outbreak of Zika virus (ZIKV) infection has been reported in South and Central America and the Caribbean. Neonatal microcephaly associated with ZIKV infection has already caused a public health emergency of international concern. No specific vaccines or drugs are currently available to treat ZIKV infection. The ZIKV helicase, which plays a pivotal role in viral RNA replication, is an attractive target for therapy. We determined the crystal structures of ZIKV helicase-ATP-Mn(2+) and ZIKV helicase-RNA. This is the first structure of any flavivirus helicase bound to ATP. Comparisons with related flavivirus helicases have shown that although the critical P-loop in the active site has variable conformations among different species, it adopts an identical mode to recognize ATP/Mn(2+). The structure of ZIKV helicase-RNA has revealed that upon RNA binding, rotations of the motor domains can cause significant conformational changes. Strikingly, although ZIKV and dengue virus (DENV) apo-helicases share conserved residues for RNA binding, their different manners of motor domain rotations result in distinct individual modes for RNA recognition. It suggests that flavivirus helicases could have evolved a conserved engine to convert chemical energy from nucleoside triphosphate to mechanical energy for RNA unwinding, but different motor domain rotations result in variable RNA recognition modes to adapt to individual viral replication.


    Organizational Affiliation

    School of Life Sciences, Tianjin University, Tianjin, 300072, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NS3 helicase
A
450Zika virus (strain Mr 766)Mutation(s): 0 
Find proteins for A0A0U4DG08 (Zika virus (strain Mr 766))
Go to UniProtKB:  A0A0U4DG08
Entity ID: 2
MoleculeChainsLengthOrganism
RNA (5'-R(*AP*GP*AP*UP*CP*AP*A)-3')B7synthetic construct
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.702 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.154 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 52.316α = 90.00
b = 72.252β = 94.45
c = 59.409γ = 90.00
Software Package:
Software NamePurpose
HKL-3000data scaling
HKL-3000data reduction
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-07-20
    Type: Initial release
  • Version 1.1: 2016-08-10
    Type: Database references
  • Version 1.2: 2016-08-31
    Type: Database references