7BSD

Complex structure of 1G5.3 Fab bound to ZIKV NS1c


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.53 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.222 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A broadly protective antibody that targets the flavivirus NS1 protein.

Modhiran, N.Song, H.Liu, L.Bletchly, C.Brillault, L.Amarilla, A.A.Xu, X.Qi, J.Chai, Y.Cheung, S.T.M.Traves, R.Setoh, Y.X.Bibby, S.Scott, C.A.P.Freney, M.E.Newton, N.D.Khromykh, A.A.Chappell, K.J.Muller, D.A.Stacey, K.J.Landsberg, M.J.Shi, Y.Gao, G.F.Young, P.R.Watterson, D.

(2021) Science 371: 190-194

  • DOI: 10.1126/science.abb9425
  • Primary Citation of Related Structures:  
    7BSC, 7BSD

  • PubMed Abstract: 
  • There are no approved flaviviral therapies and the development of vaccines against flaviruses has the potential of being undermined by antibody-dependent enhancement (ADE). The flavivirus nonstructural protein 1 (NS1) is a promising vaccine antigen with low ADE risk but has yet to be explored as a broad-spectrum therapeutic antibody target ...

    There are no approved flaviviral therapies and the development of vaccines against flaviruses has the potential of being undermined by antibody-dependent enhancement (ADE). The flavivirus nonstructural protein 1 (NS1) is a promising vaccine antigen with low ADE risk but has yet to be explored as a broad-spectrum therapeutic antibody target. Here, we provide the structural basis of NS1 antibody cross-reactivity through cocrystallization of the antibody 1G5.3 with NS1 proteins from dengue and Zika viruses. The 1G5.3 antibody blocks multi-flavivirus NS1-mediated cell permeability in disease-relevant cell lines, and therapeutic application of 1G5.3 reduces viremia and improves survival in dengue, Zika, and West Nile virus murine models. Finally, we demonstrate that 1G5.3 protection is independent of effector function, identifying the 1G5.3 epitope as a key site for broad-spectrum antiviral development.


    Organizational Affiliation

    Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia. shiyi@im.ac.cn gaof@im.ac.cn p.young@uq.edu.au d.watterson@uq.edu.au.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
1G5.3 Fab Heavy ChainA, E [auth H]223Homo sapiensMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
1G5.3 Fab Light ChainB, F [auth L]218Homo sapiensMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
NS1CC [auth G], D [auth I]181Zika virusMutation(s): 0 
EC: 3.4.21.91 (PDB Primary Data), 3.6.1.15 (PDB Primary Data), 3.6.4.13 (PDB Primary Data), 2.1.1.56 (PDB Primary Data), 2.1.1.57 (PDB Primary Data), 2.7.7.48 (PDB Primary Data)
UniProt
Find proteins for A0A024B7W1 (Zika virus (isolate ZIKV/Human/French Polynesia/10087PF/2013))
Explore A0A024B7W1 
Go to UniProtKB:  A0A024B7W1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.53 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.222 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.889α = 90
b = 111.141β = 90
c = 158.587γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-23
    Type: Initial release
  • Version 1.1: 2021-01-20
    Changes: Database references