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A Fast and Reliable Pipeline for Bacterial Transcriptome Analysis Case study: Serine-dependent Gene Regulation in Streptococcus pneumoniae
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A Fast and Reliable Pipeline for Bacterial Transcriptome Analysis Case study: Serine-dependent Gene Regulation in Streptococcus pneumoniae

Published on: April 25, 2015

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Methionine-mediated gene expression and characterization of the CmhR regulon in Streptococcus pneumoniae

Muhammad Afzal1,2, Sulman Shafeeq3, Oscar P Kuipers1

  • 11​Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747 AG, Groningen, The Netherlands.

Microbial Genomics
|March 29, 2017
PubMed

Insights

Methionine influences gene expression in Streptococcus pneumoniae D39. The regulator CmhR activates genes for methionine synthesis and transport, revealing a key regulatory mechanism.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Genomics

Background:

  • Methionine is an essential amino acid for bacterial growth.
  • Understanding methionine metabolism regulation is crucial for bacterial physiology.

Purpose of the Study:

  • To investigate the transcriptomic changes in Streptococcus pneumoniae D39 in response to varying methionine concentrations.
  • To identify the regulatory mechanisms controlling methionine synthesis and transport genes.

Main Methods:

  • Transcriptome sequencing of S. pneumoniae D39 under different methionine conditions.
  • β-galactosidase assays and quantitative RT-PCR to validate gene expression.
  • Promoter mutational analysis to confirm regulatory interactions.

Main Results:

  • Methionine supplementation altered the expression of genes involved in its synthesis and transport.
  • The transcriptional regulator CmhR (SPD-0588) was identified as an activator for several key genes.
  • A CmhR binding site was identified and validated in the promoter regions of regulated genes.

Conclusions:

  • CmhR plays a significant role in regulating methionine metabolism in S. pneumoniae.
  • This study elucidates a novel regulatory pathway for methionine homeostasis in bacteria.
Keywords:
CmhRMetEMetQMethioninePneumococcus

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