• Virology · Aug 2015

    Ebolavirus is evolving but not changing: No evidence for functional change in EBOV from 1976 to the 2014 outbreak.

    • Abayomi S Olabode, Xiaowei Jiang, David L Robertson, and Simon C Lovell.
    • Computational and Evolutionary Biology, Faculty of Life Sciences, University of Manchester, Manchester, UK.
    • Virology. 2015 Aug 1; 482: 202-7.

    AbstractThe 2014 epidemic of Ebola virus disease (EVD) has had a devastating impact in West Africa. Sequencing of ebolavirus (EBOV) from infected individuals has revealed extensive genetic variation, leading to speculation that the virus may be adapting to humans, accounting for the scale of the 2014 outbreak. We computationally analyze the variation associated with all EVD outbreaks, and find none of the amino acid replacements lead to identifiable functional changes. These changes have minimal effect on protein structure, being neither stabilizing nor destabilizing, are not found in regions of the proteins associated with known functions and tend to cluster in poorly constrained regions of proteins, specifically intrinsically disordered regions. We find no evidence that the difference between the current and previous outbreaks is due to evolutionary changes associated with transmission to humans. Instead, epidemiological factors are likely to be responsible for the unprecedented spread of EVD. Crown Copyright © 2015. Published by Elsevier Inc. All rights reserved.

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