Proteomics insights into the responses of Saccharomyces cerevisiae during mixed-culture alcoholic fermentation with Lachancea thermotolerans. Issue 9 (16th August 2019)

• Record Type: Journal Article
• Authors: Peng, Chuantao; Andersen, Birgit; Arshid, Samina; Larsen, Martin R; Albergaria, Helena; Lametsch, Rene; Arneborg, Nils
• Is Part Of: FEMS microbiology ecology. Volume 95:Issue 9(2019)
• Publication Date: 2019-08-16
• Subjects: yeast-yeast interactions -- flow cytometry -- cell sorting -- TMT-based proteomics -- alcoholic fermentations -- proteomic response; Microbial ecology -- Periodicals; Microbiology -- Periodicals; 579.17
• DOI: 10.1093/femsec/fiz126
• Languages: English
• ISSNs: 0168-6496

Abstract

ABSTRACT: The response of Saccharomyces cerevisiae to cocultivation with Lachancea thermotolerans during alcoholic fermentations has been investigated using tandem mass tag (TMT)-based proteomics. At two key time-points, S. cerevisiae was sorted from single S. cerevisiae fermentations and from mixed fermentations using flow cytometry sorting. Results showed that the purity of sorted S. cerevisiae was above 96% throughout the whole mixed-culture fermentation, thereby validating our sorting methodology. By comparing protein expression of S. cerevisiae with and without L. thermotolerans, 26 proteins were identified as significantly regulated proteins at the early death phase (T1), and 32 significantly regulated proteins were identified at the late death phase (T2) of L. thermotolerans in mixed cultures. At T1, proteins involved in endocytosis, increasing nutrient availability, cell rescue and resistance to stresses were upregulated, and proteins involved in proline synthesis and apoptosis were downregulated. At T2, proteins involved in protein synthesis and stress responses were up- and downregulated, respectively. These data indicate that S. cerevisiae was stressed by the presence of L. thermotolerans at T1, using both defensive and fighting strategies to keep itself in a dominant position, and that it at T2 was relieved from stress, perhaps increasing its enzymatic machinery to ensure better survival. Abstract : The response of S. cerevisiae to cocultivation with L. thermotolerans during alcoholic fermentations has been investigated using tandem mass tag–based proteomics combined with flow cytometry.