Journal of Microbiology

The Microbiological Society of Korea (한국미생물학회)
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Identification of Genes for Mycothiol Biosynthesis in Streptomyces coelicolor A3(2)

  • Park Joo-Hong (School of Biological Sciences and Institute of Microbiology, Seoul National University) ;
  • Cha Chang-Jun (Department of Biotechnology and BET institute, Chung-Ang University) ;
  • Roe Jung-Hye (School of Biological Sciences and Institute of Microbiology, Seoul National University)
  • Published : 2006.02.01
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Abstract

Mycothiol is a low molecular weight thiol compound produced by a number of actinomycetes, and has been suggested to serve both anti-oxidative and detoxifying roles. To investigate the metabolism and the role of mycothiol in Streptomyces coelicolor, the biosynthetic genes (mshA, B, C, and D) were predicted based on sequence homology with the mycobacterial genes and confirmed experimentally. Disruption of the mshA, C, and D genes by PCR targeting mutagenesis resulted in no synthesis of mycothiol, whereas the mshB mutation reduced its level to about $10\%$ of the wild type. The results indicate that the mshA, C, and D genes encode non-redundant biosynthetic enzymes, whereas the enzymatic activity of MshB (acetylase) is shared by at least one other gene product, most likely the mca gene product (amidase).

Keywords

References

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