Acquisition of thermotolerant yeast Saccharomyces cerevisiae by breeding via stepwise adaptation

Atsushi Satomura, Yoshiaki Katsuyama, Natsuko Miura, Kouichi Kuroda, Ayako Tomio, Takeshi Bamba, Eiichiro Fukusaki, Mitsuyoshi Ueda

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A thermotolerant Saccharomyces cerevisiae yeast strain, YK60-1, was bred from a parental strain, MT8-1, via stepwise adaptation. YK60-1 grew at 40°C, a temperature at which MT8-1 could not grow at all. YK60-1 exhibited faster growth than MT8-1 at 30°C. To investigate the mechanisms how MT8-1 acquired thermotolerance, DNA microarray analysis was performed. The analysis revealed the induction of stress-responsive genes such as those encoding heat shock proteins and trehalose biosynthetic enzymes in YK60-1. Furthermore, nontargeting metabolome analysis showed that YK60-1 accumulated more trehalose, a metabolite that contributes to stress tolerance in yeast, than MT8-1. In conclusion, S. cerevisiae MT8-1 acquired thermotolerance by induction of specific stress-responsive genes and enhanced intracellular trehalose levels.

Original languageEnglish
Pages (from-to)1116-1123
Number of pages8
JournalBiotechnology Progress
Volume29
Issue number5
DOIs
Publication statusPublished - Sep 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biotechnology

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