Binding of a neutralizing antibody to dengue virus alters the arrangement of surface glycoproteins

Shee Mei Lok, Victor Kostyuchenko, Grant E. Nybakken, Heather A. Holdaway, Anthony J. Battisti, Soila Sukupolvi-Petty, Dagmar Sedlak, Daved H. Fremont, Paul R. Chipman, John T. Roehrig, Michael S. Diamond, Richard J. Kuhn, Michael G. Rossmann

Research output: Contribution to journalArticlepeer-review

276 Scopus citations

Abstract

The monoclonal antibody 1A1D-2 has been shown to strongly neutralize dengue virus serotypes 1, 2 and 3, primarily by inhibiting attachment to host cells. A crystal structure of its antigen binding fragment (Fab) complexed with domain III of the viral envelope glycoprotein, E, showed that the epitope would be partially occluded in the known structure of the mature dengue virus. Nevertheless, antibody could bind to the virus at 37°C, suggesting that the virus is in dynamic motion making hidden epitopes briefly available. A cryo-electron microscope image reconstruction of the virus:Fab complex showed large changes in the organization of the E protein that exposed the epitopes on two of the three E molecules in each of the 60 icosahedral asymmetric units of the virus. The changes in the structure of the viral surface are presumably responsible for inhibiting attachment to cells.

Original languageEnglish
Pages (from-to)312-317
Number of pages6
JournalNature Structural and Molecular Biology
Volume15
Issue number3
DOIs
StatePublished - Mar 2008

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