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Title: Structural Definition of a Neutralization-Sensitive Epitope on the MERS-CoV S1-NTD

Journal Article · · Cell Reports

Middle East respiratory syndrome coronavirus (MERS-CoV) emerged into the human population in 2012 and has caused substantial morbidity and mortality. Potently neutralizing antibodies targeting the receptor-binding domain (RBD) on MERS-CoV spike (S) protein have been characterized, but much less is known about antibodies targeting non-RBD epitopes. Here, we report the structural and functional characterization of G2, a neutralizing antibody targeting the MERS-CoV S1 N-terminal domain (S1-NTD). Structures of G2 alone and in complex with the MERS-CoV S1-NTD define a site of vulnerability comprising two loops, each of which contain a residue mutated in G2-escape variants. Cell-surface binding studies and in vitro competition experiments demonstrate that G2 strongly disrupts the attachment of MERS-CoV S to its receptor, dipeptidyl peptidase-4 (DPP4), with the inhibition requiring the native trimeric S conformation. These results advance our understanding of antibody-mediated neutralization of coronaviruses and should facilitate the development of immunotherapeutics and vaccines against MERS-CoV.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Institutes of Health (NIH); National Institute of Allergy and Infectious Diseases (NIAID); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
R01AI127521; HHSN261200800001E; AC02-06CH11357
OSTI ID:
1566185
Alternate ID(s):
OSTI ID: 1578239
Journal Information:
Cell Reports, Journal Name: Cell Reports Vol. 28 Journal Issue: 13; ISSN 2211-1247
Publisher:
ElsevierCopyright Statement
Country of Publication:
Netherlands
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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