Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/169997
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | The streptococcus pneumoniae yefM-yoeB and relBE toxin-antitoxin operons participate in oxidative stress and biofilm formation |
Autor: | Chan, Wai Ting CSIC; Domenech, Mirian CSIC ORCID; Moreno-Córdoba, Inmaculada CSIC; Navarro-Martínez, Verónica CSIC; Nieto, Concha ; Moscoso, Miriam CSIC ORCID; García, Ernesto CSIC ORCID ; Espinosa, Manuel CSIC ORCID | Palabras clave: | Streptococcus pneumonia Toxin–antitoxin RelBE yefM-yoeB Oxidative stress Biofilm formation |
Fecha de publicación: | 18-sep-2018 | Editor: | Multidisciplinary Digital Publishing Institute | Citación: | Toxins 10(9): 378 (2018) | Resumen: | Type II (proteic) toxin-antitoxin systems (TAs) are widely distributed among bacteria and archaea. They are generally organized as operons integrated by two genes, the first encoding the antitoxin that binds to its cognate toxin to generate a harmless protein–protein complex. Under stress conditions, the unstable antitoxin is degraded by host proteases, releasing the toxin to achieve its toxic effect. In the Gram-positive pathogen Streptococcus pneumoniae we have characterized four TAs: pezAT, relBE, yefM-yoeB, and phD-doc, although the latter is missing in strain R6. We have assessed the role of the two yefM-yoeB and relBE systems encoded by S. pneumoniae R6 by construction of isogenic strains lacking one or two of the operons, and by complementation assays. We have analyzed the phenotypes of the wild type and mutants in terms of cell growth, response to environmental stress, and ability to generate biofilms. Compared to the wild-type, the mutants exhibited lower resistance to oxidative stress. Further, strains deleted in yefM-yoeB and the double mutant lacking yefM-yoeB and relBE exhibited a significant reduction in their ability for biofilm formation. Complementation assays showed that defective phenotypes were restored to wild type levels. We conclude that these two loci may play a relevant role in these aspects of the S. pneumoniae lifestyle and contribute to the bacterial colonization of new niches. | Versión del editor: | https://doi.org/10.3390/toxins10090378 | URI: | http://hdl.handle.net/10261/169997 | DOI: | 10.3390/toxins10090378 | E-ISSN: | 2072-6651 |
Aparece en las colecciones: | (CIB) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
toxins-10-00378.pdf | 2 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
PubMed Central
Citations
22
checked on 01-abr-2024
SCOPUSTM
Citations
31
checked on 13-abr-2024
WEB OF SCIENCETM
Citations
28
checked on 26-feb-2024
Page view(s)
328
checked on 18-abr-2024
Download(s)
284
checked on 18-abr-2024