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, 9 (6)

Tenacious Researchers Identify a Weakness in All Ebolaviruses

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Tenacious Researchers Identify a Weakness in All Ebolaviruses

Rebecca M DuBois. mBio.

Abstract

The Ebolavirus genus has at least five members, four of which are known to cause deadly disease in humans. An ideal therapy or a vaccine would protect against all ebolaviruses, but identifying a common weakness in all of them has remained elusive. West et al. [B. R. West, C. L. Moyer, L. B. King, M. L. Fusco, et al., mBio 9(5):e01674-18, 2018, https://doi.org/10.1128/mBio.01674-18] make the exciting discovery of an "Achilles' heel," a cryptic and conserved pocket, on the surface antigen glycoprotein (GP) that is nearly identical in all known ebolaviruses. Key to this discovery was their study of antibody ADI-15878, the only isolated human antibody that can block infectivity of all known ebolaviruses. Following tenacious efforts in X-ray crystallography, West et al. report the high-resolution crystal structures of the Ebola virus GP and the Bundibugyo virus GP, each bound to antibody ADI-15878. These structures reveal a highly conserved but partially obscured site on the virus GP, providing a foundation for design of vaccine antigens or antiviral therapies.

Keywords: ebola virus; neutralizing antibodies; protein structure-function.

Figures

FIG 1
FIG 1
The ADI-15878 antibody binds to a conserved hydrophobic site on the GP glycoproteins that are located on the surface of Ebola virus. This site is normally obscured by a flexible region of GP, represented as the hands of the Ebola virus.

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References

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