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© Carmen Buchrieser, Marie-Christine Prevost
Legionella pneumophila et son flagelle, bactérie responsable de pneumopathie aigue grave. Bactérie de l'environnement , l'émergence récente de cette maladie s'explique par son affinité pour les systèmes modernes d'alimentation en eau comme les tours de refroidissement. Image colorisée.
Publication : FEMS microbiology reviews

Small RNAs, 5′ UTR elements and RNA-binding proteins in intracellular bacteria: impact on metabolism and virulence

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in FEMS microbiology reviews - 01 May 2015

Oliva G, Sahr T, Buchrieser C

Link to Pubmed [PMID] – 26009640

FEMS Microbiol. Rev. 2015 May;39(3):331-49

Sequencing-based studies have illuminated increased transcriptional complexity within the genome structure of bacteria and have resulted in the identification of many small regulatory RNAs (sRNA) and a large amount of antisense transcription. It remains an open question whether these sRNAs all indeed play regulatory roles, but their identification led to an exponential increase in studies searching for their function. This allowed to show that sRNAs may modulate virulence gene expression, cellular differentiation, metabolic functions, adaptation to environmental conditions and pathogenesis. In this review we will provide mechanistic insights into how sRNAs bind mRNAs and/or proteins. Furthermore, the important roles of the RNA chaperone Hfq, the CsrA system and the CRISPR RNA will be discussed. We will then focus on sRNAs and 5(‘) untranslated region (UTR) elements of intracellular bacteria like Chlamydia, Listeria, Legionella, or Salmonella, and place emphasis on those that are expressed during replication in host cells and are implicated in virulence and metabolism. In addition, sRNAs that regulate motility, iron homeostasis, and differentiation or stress responses will be highlighted. Taken together sRNAs constitute key elements in many major regulatory networks governing the intracellular life and virulence of pathogenic bacteria.

http://www.ncbi.nlm.nih.gov/pubmed/26009640