Ubiquitination of Listeria Virulence Factor InlC Contributes to the Host Response to Infection - Université Paris Cité Accéder directement au contenu
Article Dans Une Revue mBio Année : 2019

Ubiquitination of Listeria Virulence Factor InlC Contributes to the Host Response to Infection

Résumé

Listeria monocytogenes is a pathogenic bacterium causing potentially fatal foodborne infections in humans and animals. While the mechanisms used by Listeria to manipulate its host have been thoroughly characterized, how the host controls bacterial virulence factors remains to be extensively deciphered. Here, we found that the secreted Listeria virulence protein InlC is monoubiquitinated by the host cell machinery on K224, restricting infection. We show that the ubiquitinated form of InlC interacts with the intracellular alarmin S100A9, resulting in its stabilization and in increased reactive oxygen species production by neutrophils in infected mice. Collectively, our results suggest that posttranslational modification of InlC exacerbates the host response upon Listeria infection. IMPORTANCE The pathogenic potential of Listeria monocytogenes relies on the production of an arsenal of virulence determinants that have been extensively characterized , including surface and secreted proteins of the internalin family. We have previously shown that the Listeria secreted internalin InlC interacts with IB kinase ␣ to interfere with the host immune response (E. Gouin, M. Adib-Conquy, D. Balestrino, M.-A. Nahori, et al., Proc Natl Acad Sci USA, 107:17333-17338, 2010, https://doi.org/10 .1073/pnas.1007765107). In the present work, we report that InlC is monoubiquitinated on K 224 upon infection of cells and provide evidence that ubiquitinated InlC interacts with and stabilizes the alarmin S100A9, which is a critical regulator of the immune response and inflammatory processes. Additionally, we show that ubiquitination of InlC causes an increase in reactive oxygen species production by neutrophils in mice and restricts Listeria infection. These findings are the first to identify a posttranscriptional modification of an internalin contributing to host defense.
Fichier principal
Vignette du fichier
mBio-2019-Gouin-e02778-19.full.pdf (1.93 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02573180 , version 1 (14-05-2020)

Licence

Paternité

Identifiants

Citer

Edith Gouin, Damien Balestrino, Orhan Rasid, Marie-Anne Nahori, Veronique Villiers, et al.. Ubiquitination of Listeria Virulence Factor InlC Contributes to the Host Response to Infection. mBio, 2019, 10 (6), ⟨10.1128/mBio.02778-19⟩. ⟨hal-02573180⟩
36 Consultations
49 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More