Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/2394
Título: Identification of novel GAPDH-derived antimicrobial peptides secreted by Saccharomyces cerevisiae and involved in wine microbial interactions
Autor: Branco, Patrícia
Francisco, Diana
Chambon, Christophe
Hébraud, Michel
Arneborg, Nils
Almeida, Maria G.
Caldeira, Jorge
Albergaria, Helena
Palavras-chave: Antimicrobial Peptides
Wine microbial interactions
Alcoholic fermentation
Biopreservation
Metacaspases
Data: 2014
Editora: Springer
Citação: Branco, P.; Francisco, D.; Chambon, C.; Hébraud, M.; Arneborg, N.; Almeida, M.G.; Caldeira, J.; Albergaria, H. Identification of novel GAPDH-derived antimicrobial peptides secreted by Saccharomyces cerevisiae and involved in wine microbial interactions. In: Applied Microbiology and Biotechnology, 2014, Vol. 98, p. 843-853
Resumo: Saccharomyces cerevisiae plays a primordial role in alcoholic fermentation and has a vastworldwide application in the production of fuel-ethanol, food and beverages. The dominance of S. cerevisiae over other microbial species during alcoholic fermentations has been traditionally ascribed to its higher ethanol tolerance. However, recent studies suggested that other phenomena, such as microbial interactions mediated by killer-like toxins, might play an important role. Here we show that S. cerevisiae secretes antimicrobial peptides (AMPs) during alcoholic fermentation that are active against a wide variety of wine-related yeasts (e.g. Dekkera bruxellensis) and bacteria (e.g. Oenococcus oeni). Mass spectrometry analyses revealed that these AMPs correspond to fragments of the S. cerevisiae glyceraldehyde 3-phosphate dehydrogenase (GAPDH) protein. The involvement of GAPDH-derived peptides in wine microbial interactions was further sustained by results obtained in mixed cultures performed with S. cerevisiae single mutants deleted in each of the GAPDH codifying genes (TDH1-3) and also with a S. cerevisiae mutant deleted in the YCA1 gene, which codifies the apoptosis-involved enzyme metacaspase. These findings are discussed in the context of wine microbial interactions, biopreservation potential and the role of GAPDH in the defence system of S. cerevisiae.
URI: http://hdl.handle.net/10400.9/2394
ISSN: 0175-7598
Versão do Editor: http://dx.doi.org/10.1007/s00253-013-5411-y
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