Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Effects of pH Shock on the Secretion System in Streptomyces coelicolor A3(2)

  • Kim, Yoon-Jung (Department of Chemical and Biomolecular Engineering (The Brain Korea 21 Program), Korea Advanced Institute of Science and Technology) ;
  • Song, Jae-Yang (Department of Chemical and Biomolecular Engineering (The Brain Korea 21 Program), Korea Advanced Institute of Science and Technology) ;
  • Hong, Soon-Kwang (Division of Bioscience and Bioinformatics, Myung-Ji University) ;
  • Smith, Colin P. (Functional Genomics Laboratory, School of Biomedical and Molecular Sciences, University of Surrey) ;
  • Chang, Yong-Keun (Department of Chemical and Biomolecular Engineering (The Brain Korea 21 Program), Korea Advanced Institute of Science and Technology)
  • Published : 2008.04.30
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Abstract

Effects of pH shock on the secretion system of S. coelicolor A3(2) have been investigated at a transcriptional level by using DNA microarrays. Actinorhodin secretion was observed to be highly enhanced when an acidic-pH shock was applied to surface grown cultures of S. coelicolor A3(2). In this culture, a gene of actVA-orf1 encoding a putative efflux pump or transporter protein for actinorhodin was strongly upregulated. A major number of efflux pumps for other metabolites and a major number of secretion proteins for protein secretion were also observed to be upregulated with pH shock. The secretion of actinorhodin was observed to be remarkably enhanced in liquid culture as well.

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References

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