EV71 3C protease induces apoptosis by cleavage of hnRNP A1 to promote apaf-1 translation.

Autor: Mei-Ling Li, Jing-Yi Lin, Bo-Shiun Chen, Kuo-Feng Weng, Shin-Ru Shih, Jesse Davila Calderon, Blanton S Tolbert, Gary Brewer
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: PLoS ONE, Vol 14, Iss 9, p e0221048 (2019)
Druh dokumentu: article
ISSN: 1932-6203
04014863
DOI: 10.1371/journal.pone.0221048
Popis: Enterovirus 71 (EV71) induces apoptosis to promote viral particle release. Earlier work showed that EV71 utilizes its 3C protease to induce apoptosis in a caspase-3-dependent pathway, though the mechanism is unknown. However, work from Vagner, Holcik and colleagues showed that host protein heterogeneous ribonucleoprotein A1 (hnRNP A1) binds the IRES of cellular apoptotic peptidase activating factor 1 (apaf-1) mRNA to repress its translation. In this work, we show that apaf-1 expression is essential for EV71-induced apoptosis. EV71 infection or ectopic expression of 3C protease cleaves hnRNP A1, which abolishes its binding to the apaf-1 IRES. This allows IRES-dependent synthesis of apaf-1, activation of caspase-3, and apoptosis. Thus, we reveal a novel mechanism that EV71 utilizes for virus release via a 3C protease-hnRNP A1-apaf-1-caspase-3-apoptosis axis.
Databáze: Directory of Open Access Journals
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