Bypassing pan-enterovirus host factor PLA2G16

Jim Baggen, Yue Liu, Heyrhyoung Lyoo, Arno L W van Vliet, Maryam Wahedi, Jost W de Bruin, Richard W Roberts, Pieter Overduin, Adam Meijer, Michael G Rossmann, Hendrik Jan Thibaut, Frank J M van Kuppeveld

    Research output: Contribution to journalArticleAcademicpeer-review

    Abstract

    Enteroviruses are a major cause of human disease. Adipose-specific phospholipase A2 (PLA2G16) was recently identified as a pan-enterovirus host factor and potential drug target. In this study, we identify a possible mechanism of PLA2G16 evasion by employing a dual glycan receptor-binding enterovirus D68 (EV-D68) strain. We previously showed that this strain does not strictly require the canonical EV-D68 receptor sialic acid. Here, we employ a haploid screen to identify sulfated glycosaminoglycans (sGAGs) as its second glycan receptor. Remarkably, engagement of sGAGs enables this virus to bypass PLA2G16. Using cryo-EM analysis, we reveal that, in contrast to sialic acid, sGAGs stimulate genome release from virions via structural changes that enlarge the putative openings for genome egress. Together, we describe an enterovirus that can bypass PLA2G16 and identify additional virion destabilization as a potential mechanism to circumvent PLA2G16.

    Original languageEnglish
    Article number3171
    JournalNature Communications
    Volume10
    Issue number1
    DOIs
    Publication statusPublished - 18 Jul 2019

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