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Riboregulation in plant-associated α-proteobacteria.

Anke Becker1, Aaron Overlöper2, Jan-Philip Schlüter1

  • 1LOEWE Centre for Synthetic Microbiology and Faculty of Biology; Philipps-Universität Marburg; Marburg, Germany.

RNA Biology
|July 9, 2014
PubMed
Summary
This summary is machine-generated.

Small non-coding RNAs (sRNAs) and the Hfq protein regulate key functions in plant-associated bacteria like symbiosis and virulence. AbcR sRNAs are conserved and control nutrient uptake systems in these important microbes.

Keywords:
RNA-binding proteinRNA-seqRhizobialesantisense RNAnon-coding RNAribolysisriboregulationsRNAα-proteobacteria

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Genetics

Background:

  • Plant-associated α-proteobacteria, including Sinorhizobium meliloti and Agrobacterium tumefaciens, are crucial models for studying plant-microbe interactions.
  • These bacteria possess complex lifestyles and large genomes, with small non-coding RNAs (sRNAs) playing significant regulatory roles.
  • The RNA chaperone Hfq is known to influence gene expression in bacteria.

Purpose of the Study:

  • To review recent findings on small non-coding RNAs (sRNAs) in plant-associated α-proteobacteria.
  • To explore the conservation, function, and Hfq interaction of these sRNAs.
  • To highlight the role of sRNAs and Hfq in bacterial physiology, including symbiosis and virulence.

Main Methods:

  • High-throughput approaches were used to identify hundreds of cis- and trans-encoded sRNAs.
  • Construction of 39 sRNA family models based on identified sRNAs.
  • Genome-wide analyses of hfq mutants and Hfq co-immunoprecipitation experiments.

Main Results:

  • Hundreds of regulatory sRNAs were identified in Sinorhizobium meliloti, Bradyrhizobium japonicum, Rhizobium etli, and Agrobacterium tumefaciens.
  • The RNA chaperone Hfq significantly impacts the physiology of plant-associated α-proteobacteria, affecting symbiosis and virulence.
  • Conserved AbcR sRNAs, particularly AbcR1, regulate ABC transport systems and nutrient uptake, with similar functions observed across different species.

Conclusions:

  • Small non-coding RNAs and the Hfq protein are major regulators of gene expression in plant-associated α-proteobacteria.
  • AbcR sRNAs are critical for nutrient acquisition and have conserved roles in symbiosis and virulence.
  • Understanding sRNA-mediated regulation provides insights into host-microbe interactions and bacterial adaptation.