Transplantation of a quaternary structure neutralizing antibody epitope from dengue virus serotype 3 into serotype 4

Dengue vaccine trials have revealed deficits in our understanding of the mechanisms of protective immunity, demonstrating a need to measure epitope-specific antibody responses against each DENV serotype. HmAb 5J7 binds to a complex, 3-monomer spanning quaternary epitope in the DENV3 envelope (E) pro...

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Veröffentlicht in:Scientific reports 2017-12, Vol.7 (1), p.17169-10, Article 17169
Hauptverfasser: Widman, Douglas G., Young, Ellen, Nivarthi, Usha, Swanstrom, Jesica A., Royal, Scott R., Yount, Boyd L., Debbink, Kari, Begley, Matthew, Marcet, Stephanie, Durbin, Anna, de Silva, Aravinda M., Messer, William B., Baric, Ralph S.
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container_end_page 10
container_issue 1
container_start_page 17169
container_title Scientific reports
container_volume 7
creator Widman, Douglas G.
Young, Ellen
Nivarthi, Usha
Swanstrom, Jesica A.
Royal, Scott R.
Yount, Boyd L.
Debbink, Kari
Begley, Matthew
Marcet, Stephanie
Durbin, Anna
de Silva, Aravinda M.
Messer, William B.
Baric, Ralph S.
description Dengue vaccine trials have revealed deficits in our understanding of the mechanisms of protective immunity, demonstrating a need to measure epitope-specific antibody responses against each DENV serotype. HmAb 5J7 binds to a complex, 3-monomer spanning quaternary epitope in the DENV3 envelope (E) protein, but it is unclear whether all interactions are needed for neutralization. Structure guided design and reverse genetics were used to sequentially transplant larger portions of the DENV3-specific 5J7 mAb epitope into dengue virus serotype 4 (DENV4). We observed complete binding and neutralization only when the entire 3 monomer spanning epitope was transplanted into DENV4, providing empirical proof that cooperative monomer-hmAb 5J7 interactions maximize activity. The rDENV4/3 virus containing the most expanded 5J7 epitope was also significantly more sensitive than WT DENV4 to neutralization by DENV3 primary immune sera. We conclude that the hinge-spanning region of the 5J7 quaternary epitope is a target for serotype-specific neutralizing antibodies after DENV3 infection.
doi_str_mv 10.1038/s41598-017-17355-5
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subjects 13/1
45/77
45/91
631/250/590
631/337
692/699/255/2514
Amino Acid Sequence
Animals
Antibodies, Monoclonal - chemistry
Antibodies, Monoclonal - genetics
Antibodies, Monoclonal - immunology
Antibodies, Neutralizing - chemistry
Antibodies, Neutralizing - genetics
Antibodies, Neutralizing - immunology
Antibodies, Viral - chemistry
Antibodies, Viral - genetics
Antibodies, Viral - immunology
Antisera
Chlorocebus aethiops
Dengue - immunology
Dengue - virology
Dengue fever
Dengue Virus - classification
Dengue Virus - genetics
Dengue Virus - immunology
Epitopes
Epitopes - immunology
Genetics
Humanities and Social Sciences
Humans
Monoclonal antibodies
multidisciplinary
Neutralization
Neutralization Tests
Protein structure
Protein Structure, Quaternary
Quaternary structure
Science
Science (multidisciplinary)
Sequence Homology
Serogroup
Transplantation
Transplants & implants
U937 Cells
Vector-borne diseases
Vero Cells
Viral Envelope Proteins - immunology
title Transplantation of a quaternary structure neutralizing antibody epitope from dengue virus serotype 3 into serotype 4
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