Saccharomyces cerevisiae accumulates GAPDH-derived peptides on its cell surface that induce death of non-Saccharomyces yeasts by cell-to-cell contact. Issue 5 (25th April 2017)

• Record Type: Journal Article
• Authors: Branco, Patrícia; Kemsawasd, Varongsiri; Santos, Lara; Diniz, Mário; Caldeira, Jorge; Almeida, Maria Gabriela; Arneborg, Nils; Albergaria, Helena
• Is Part Of: FEMS microbiology ecology. Volume 93:Issue 5(2017:May)
• Publication Date: 2017-04-25
• Subjects: antimicrobial peptides -- glyceraldehyde-3-phosphate dehydrogenase -- cell surface proteins -- microbial interactions -- ecological dominance -- wine fermentation; Microbial ecology -- Periodicals; Microbiology -- Periodicals; 579.17
• DOI: 10.1093/femsec/fix055
• Languages: English
• ISSNs: 0168-6496

Abstract

Abstract: During wine fermentations, Saccharomyces cerevisiae starts to excrete antimicrobial peptides (AMPs) into the growth medium that induce death of non- Saccharomyces yeasts at the end of exponential growth phase (24–48 h). Those AMPs were found to derive from the glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH). On the other hand, the early death of non- Saccharomyces yeasts during wine fermentations was also found to be mediated by a cell-to-cell contact mechanism. Since GAPDH is a cell-wall-associated protein in S. cerevisiae, we put forward the hypothesis that the GAPDH-derived AMPs could accumulate on the cell surface of S. cerevisiae, thus inducing death of non- Saccharomyces yeasts by cell-to-cell contact. Here we show that 48-h grown (stationary phase) cells of S. cerevisiae induce death of Hanseniaspora guilliermondii and Lachancea thermotolerans by direct cell-to-cell contact, while 12-h grown cells (mid-exponential phase) do not. Immunological tests performed with a specific polyclonal antibody against the GAPDH-derived AMPs revealed their presence in the cell wall of S. cerevisiae cells grown for 48 h, but not for 12 h. Taken together, our data show that accumulation of GAPDH-derived AMPs on the cell surface of S. cerevisiae is one of the factors underlying death of non- Saccharomyces yeasts by cell-to-cell contact. Abstract : Saccharomyces cerevisiae accumulates defensive weapons (GAPDH-derived AMPs) on its cell surface that kill other competitor yeasts species within the wine environment by cell-to-cell contact.