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Title: An expanded transcriptome atlas for Bacteroides thetaiotaomicron reveals a small RNA that modulates tetracycline sensitivity

Journal Article · · Nature Microbiology
ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1];  [2];  [1];  [1]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]
  1. Helmholtz Centre for Infection Research, Wurzburg (Germany). Institute for RNA-based Infection Research
  2. Helmholtz Centre for Infection Research, Wurzburg (Germany). Institute for RNA-based Infection Research; Technical Univ. of Munich (Germany)
  3. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  4. Helmholtz Centre for Infection Research, Wurzburg (Germany). Institute for RNA-based Infection Research; Univ. of Wurzburg (Germany); Univ. of Toronto, Mississauga, ON (Canada)
  5. Helmholtz Centre for Infection Research, Wurzburg (Germany). Institute for RNA-based Infection Research; Univ. of Wurzburg (Germany)

Plasticity in gene expression allows bacteria to adapt to diverse environments. This is particularly relevant in the dynamic niche of the human intestinal tract; however, transcriptional networks remain largely unknown for gut-resident bacteria. Here we apply differential RNA sequencing (RNA-seq) and conventional RNA-seq to the model gut bacterium Bacteroides thetaiotaomicron to map transcriptional units and profile their expression levels across 15 in vivo-relevant growth conditions. We infer stress- and carbon source-specific transcriptional regulons and expand the annotation of small RNAs (sRNAs). Integrating this expression atlas with published transposon mutant fitness data, we predict conditionally important sRNAs. These include MasB, which downregulates tetracycline tolerance. Using MS2 affinity purification and RNA-seq, we identify a putative MasB target and assess its role in the context of the MasB-associated phenotype. These data—publicly available through the Theta-Base web browser (http://micromix.helmholtz-hiri.de/bacteroides/)—constitute a valuable resource for the microbiome community.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2375467
Journal Information:
Nature Microbiology, Journal Name: Nature Microbiology Journal Issue: 4 Vol. 9; ISSN 2058-5276
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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