title: Nutrition-adaptive control of multiple-bacteriocin production by Weissella hellenica QU 13.
abstract: OBJECTIVE
  To analyse nutrition-adaptive multiple-bacteriocin production by Weissella hellenica QU 13.
  
  
  RESULTS
  Weissella hellenica QU 13 produces two leaderless bacteriocins, weissellicins Y and M. Their production was studied in MRS and APT media by quantification analyses with liquid chromatography mass spectrometry (LC/MS), while transcriptional analysis of biosynthetic genes was performed by real-time reverse transcription (RT)-PCR. Weissellicin Y production was higher in MRS culture than in APT culture, while weissellicin M production was higher in APT culture than in MRS culture. APT medium contains a higher amount of thiamine than MRS medium, to enhance the growth of heterofermentative lactic acid bacteria. Therefore, thiamine addition to MRS culture enhanced the growth of W. hellenica QU 13; consequently, weissellicin Y production was decreased, while weissellicin M production was not affected. Furthermore, real-time RT-PCR analyses indicated that the transcriptional trends of their respective structural genes, welY and welM, were different from each other, and that these two genes' transcriptions responded to nutrition conditions.
  
  
  CONCLUSIONS
  Weissella hellenica QU 13 was demonstrated to control weissellicins Y and M production based on nutrition conditions. In addition, differential expression behaviour of weissellicins Y and M indicates that each of them would have separate roles to adapt to different environmental situations.
  
  
  CONCLUSIONS
  This is the first report that describes nutrition-adaptive multiple-bacteriocin production, in which thiamine inhibits bacteriocin production while it enhances the growth of the producer strain.
authors.affiliation: Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Masuda
authors.affiliation: Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan.
authors.forename: R H
authors.initials: RH
authors.lastname: Perez
authors.affiliation: Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Zendo
authors.affiliation: Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan.|Laboratory of Functional Food Design, Department of Functional Metabolic Design, Bio-Architecture Center, Kyushu University, Fukuoka, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Sonomoto
mesh_terms: D001430:Bacteriocins / Q000096:biosynthesis* / Q000737:chemistry; D003470:Culture Media / Q000737:chemistry / Q000378:metabolism*; D013058:Mass Spectrometry; D058836:Weissella / Q000235:genetics / Q000378:metabolism*
chemical_list: D001430:Bacteriocins; D003470:Culture Media
keywords: Weissella; bacteriocin; environmental response; lactic acid bacteria; multiple-bacteriocin production; weissellicin