7LSF image
Entry Detail
PDB ID:
7LSF
Title:
Crystal structure of the human neutralizing antibody Fab fragment T025 bound to TBEV EDIII (Western Subtype)
Biological Source:
PDB Version:
Deposition Date:
2021-02-18
Release Date:
2021-04-07
Method Details:
Experimental Method:
Resolution:
2.24 Å
R-Value Free:
0.22
R-Value Work:
0.18
R-Value Observed:
0.19
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Envelope protein E
Chain IDs:C (auth: E)
Chain Length:120
Number of Molecules:1
Biological Source:Tick-borne encephalitis virus (WESTERN SUBTYPE)
Polymer Type:polypeptide(L)
Description:T025 Fab Heavy Chain
Chain IDs:A (auth: H)
Chain Length:232
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:T025 Fab Light Chain
Chain IDs:B (auth: L)
Chain Length:214
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Broad and potent neutralizing human antibodies to tick-borne flaviviruses protect mice from disease.
J.Exp.Med. 218 ? ? (2021)
PMID: 33831141 DOI: 10.1084/jem.20210236

Abstact

Tick-borne encephalitis virus (TBEV) is an emerging human pathogen that causes potentially fatal disease with no specific treatment. Mouse monoclonal antibodies are protective against TBEV, but little is known about the human antibody response to infection. Here, we report on the human neutralizing antibody response to TBEV in a cohort of infected and vaccinated individuals. Expanded clones of memory B cells expressed closely related anti-envelope domain III (EDIII) antibodies in both groups of volunteers. However, the most potent neutralizing antibodies, with IC50s below 1 ng/ml, were found only in individuals who recovered from natural infection. These antibodies also neutralized other tick-borne flaviviruses, including Langat, louping ill, Omsk hemorrhagic fever, Kyasanur forest disease, and Powassan viruses. Structural analysis revealed a conserved epitope near the lateral ridge of EDIII adjoining the EDI-EDIII hinge region. Prophylactic or early therapeutic antibody administration was effective at low doses in mice that were lethally infected with TBEV.

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Primary Citation of related structures