Grad-seq in a Gram-positive bacterium reveals exonucleolytic sRNA activation in competence control.
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Authors
Hör, JensGarriss, Geneviève
Di Giorgio, Silvia
Hack, Lisa-Marie
Vanselow, Jens T
Förstner, Konrad U
Schlosser, Andreas
Henriques-Normark, Birgitta
Vogel, Jörg
Issue Date
2020-03-30
Metadata
Show full item recordAbstract
RNA-protein interactions are the crucial basis for many steps of bacterial gene expression, including post-transcriptional control by small regulatory RNAs (sRNAs). In stark contrast to recent progress in the analysis of Gram-negative bacteria, knowledge about RNA-protein complexes in Gram-positive species remains scarce. Here, we used the Grad-seq approach to draft a comprehensive landscape of such complexes in Streptococcus pneumoniae, in total determining the sedimentation profiles of ~ 88% of the transcripts and ~ 62% of the proteins of this important human pathogen. Analysis of in-gradient distributions and subsequent tag-based protein capture identified interactions of the exoribonuclease Cbf1/YhaM with sRNAs that control bacterial competence for DNA uptake. Unexpectedly, the nucleolytic activity of Cbf1 stabilizes these sRNAs, thereby promoting their function as repressors of competence. Overall, these results provide the first RNA/protein complexome resource of a Gram-positive species and illustrate how this can be utilized to identify new molecular factors with functions in RNA-based regulation of virulence-relevant pathways.Citation
EMBO J. 2020 Mar 30:e103852. doi: 10.15252/embj.2019103852.Affiliation
HIRI, Helmholtz-Institut für RNA-basierte Infektionsforschung, Josef-Shneider Strasse 2, 97080 Würzburg, Germany.Publisher
EMBO PressJournal
The EMBO journalPubMed ID
32227509Type
ArticleLanguage
enEISSN
1460-2075ae974a485f413a2113503eed53cd6c53
10.15252/embj.2019103852
Scopus Count
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- Creative Commons
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 4.0 International
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