A small regulatory RNA alters Staphylococcus aureus virulence by titrating RNAIII activity - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nucleic Acids Research Année : 2021

A small regulatory RNA alters Staphylococcus aureus virulence by titrating RNAIII activity

Résumé

Staphylococcus aureus is an opportunistic human and animal pathogen with an arsenal of virulence factors that are tightly regulated during bacterial infection. The latter is achieved through a sophisticated network of regulatory proteins and regulatory RNAs. Here, we describe the involvement of a novel prophage-carried small regulatory S. aureus RNA, SprY, in the control of virulence genes. An MS2-affinity purification assay reveals that SprY forms a complex in vivo with RNAIII, a major regulator of S. aureus virulence genes. SprY binds to the 13th stem-loop of RNAIII, a key functional region involved in the repression of multiple mRNA targets. mRNAs encoding the repressor of toxins Rot and the extracellular complement binding protein Ecb are among the targets whose expression is increased by SprY binding to RNAIII. Moreover, SprY decreases S. aureus hemolytic activity and virulence. Our results indicate that SprY titrates RNAIII activity by targeting a specific stem loop. Thus, we demonstrate that a prophage-encoded sRNA reduces the pathogenicity of S. aureus through RNA sponge activity.
Fichier principal
Vignette du fichier
gkab782.pdf (3.95 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03369833 , version 1 (30-05-2022)

Identifiants

Citer

Kim Boi Le Huyen, Cintia Daniela Gonzalez, Gaetan Pascreau, Valérie Bordeau, Vincent Cattoir, et al.. A small regulatory RNA alters Staphylococcus aureus virulence by titrating RNAIII activity. Nucleic Acids Research, 2021, 49 (18), pp.10644-10656. ⟨10.1093/nar/gkab782⟩. ⟨hal-03369833⟩
77 Consultations
21 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More