2.50
Hdl Handle:
http://hdl.handle.net/10033/595720
Title:
Global Regulation of Gene Expression by the MafR Protein of Enterococcus faecalis.
Authors:
Ruiz-Cruz, Sofía; Espinosa, Manuel; Goldmann, Oliver; Bravo, Alicia
Abstract:
Enterococcus faecalis is a natural inhabitant of the human gastrointestinal tract. However, as an opportunistic pathogen, it is able to colonize other host niches and cause life-threatening infections. Its adaptation to new environments involves global changes in gene expression. The EF3013 gene (here named mafR) of E. faecalis strain V583 encodes a protein (MafR, 482 residues) that has sequence similarity to global response regulators of the Mga/AtxA family. The enterococcal OG1RF genome also encodes the MafR protein (gene OG1RF_12293). In this work, we have identified the promoter of the mafR gene using several in vivo approaches. Moreover, we show that MafR influences positively the transcription of many genes on a genome-wide scale. The most significant target genes encode components of PTS-type membrane transporters, components of ABC-type membrane transporters, and proteins involved in the metabolism of carbon sources. Some of these genes were previously reported to be up-regulated during the growth of E. faecalis in blood and/or in human urine. Furthermore, we show that a mafR deletion mutant strain induces a significant lower degree of inflammation in the peritoneal cavity of mice, suggesting that enterococcal cells deficient in MafR are less virulent. Our work indicates that MafR is a global transcriptional regulator. It might facilitate the adaptation of E. faecalis to particular host niches and, therefore, contribute to its potential virulence.
Affiliation:
Helmholtz Centre for infection research, Inhoffenstr. 7, D-38124 Braunschweig, Germany.
Citation:
Global Regulation of Gene Expression by the MafR Protein of Enterococcus faecalis. 2015, 6:1521 Front Microbiol
Journal:
Frontiers in microbiology
Issue Date:
2015
URI:
http://hdl.handle.net/10033/595720
DOI:
10.3389/fmicb.2015.01521
PubMed ID:
26793169
Type:
Article
Language:
en
ISSN:
1664-302X
Appears in Collections:
publications of the research group immunology of infection (INI)

Full metadata record

DC FieldValue Language
dc.contributor.authorRuiz-Cruz, Sofíaen
dc.contributor.authorEspinosa, Manuelen
dc.contributor.authorGoldmann, Oliveren
dc.contributor.authorBravo, Aliciaen
dc.date.accessioned2016-02-05T15:15:11Zen
dc.date.available2016-02-05T15:15:11Zen
dc.date.issued2015en
dc.identifier.citationGlobal Regulation of Gene Expression by the MafR Protein of Enterococcus faecalis. 2015, 6:1521 Front Microbiolen
dc.identifier.issn1664-302Xen
dc.identifier.pmid26793169en
dc.identifier.doi10.3389/fmicb.2015.01521en
dc.identifier.urihttp://hdl.handle.net/10033/595720en
dc.description.abstractEnterococcus faecalis is a natural inhabitant of the human gastrointestinal tract. However, as an opportunistic pathogen, it is able to colonize other host niches and cause life-threatening infections. Its adaptation to new environments involves global changes in gene expression. The EF3013 gene (here named mafR) of E. faecalis strain V583 encodes a protein (MafR, 482 residues) that has sequence similarity to global response regulators of the Mga/AtxA family. The enterococcal OG1RF genome also encodes the MafR protein (gene OG1RF_12293). In this work, we have identified the promoter of the mafR gene using several in vivo approaches. Moreover, we show that MafR influences positively the transcription of many genes on a genome-wide scale. The most significant target genes encode components of PTS-type membrane transporters, components of ABC-type membrane transporters, and proteins involved in the metabolism of carbon sources. Some of these genes were previously reported to be up-regulated during the growth of E. faecalis in blood and/or in human urine. Furthermore, we show that a mafR deletion mutant strain induces a significant lower degree of inflammation in the peritoneal cavity of mice, suggesting that enterococcal cells deficient in MafR are less virulent. Our work indicates that MafR is a global transcriptional regulator. It might facilitate the adaptation of E. faecalis to particular host niches and, therefore, contribute to its potential virulence.en
dc.language.isoenen
dc.titleGlobal Regulation of Gene Expression by the MafR Protein of Enterococcus faecalis.en
dc.typeArticleen
dc.contributor.departmentHelmholtz Centre for infection research, Inhoffenstr. 7, D-38124 Braunschweig, Germany.en
dc.identifier.journalFrontiers in microbiologyen

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