ISDA: 7BSC

Deposition Date 2020-03-30

Release Date 2020-12-23

Last Version Date 2024-11-06

Entry Detail

PDB ID:

7BSC

Keywords:

VIRAL PROTEIN/IMMUNE SYSTEM

Title:

Complex structure of 1G5.3 Fab bound to DENV2 NS1c

Biological Source:

Source Organism(s):

Dengue virus 2 (Taxon ID: 11060)
Homo sapiens (Taxon ID: 9606)

Expression System(s):

Escherichia coli bl21, Homo sapiens

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.31 Å

R-Value Free:

0.23

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 21 2 21

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Non-structural protein 1
Chain IDs:A
Chain Length:181
Number of Molecules:1
Biological Source:Dengue virus 2

UniProt ID:Q6TFL7 Pfam ID:PF00948

Polymer Type:polypeptide(L)
Molecule:1G5.3 Fab Heavy Chain
Chain IDs:B (auth: H)
Chain Length:223
Number of Molecules:1
Biological Source:Homo sapiens

Polymer Type:polypeptide(L)
Molecule:1G5.3 Fab Light Chain
Chain IDs:C (auth: L)
Chain Length:218
Number of Molecules:1
Biological Source:Homo sapiens

Primary Citation

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.Show

Science 371 190 194 (2021)

PMID: 33414219 DOI: 10.1126/science.abb9425

Abstact

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.

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Primary Citation of related structures

Abstact

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