Lookup NU author(s): Dr Alison Day,
Professor Janet Quinn
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2018, The Author(s). Erythritol production is a unique response to hyperosmotic stress that is observed in a small group of yeasts, including Yarrowia lipolytica. This study investigated whether this unusual mechanism is regulated by the HOG pathway, well described in Saccharomyces cerevisiae. The gene YALI0E25135g was identified as the Y. lipolytica homologue of HOG1 and was found to be phosphorylated in response to hyperosmotic shock. Deletion of the gene caused a significant decrease in resistance to hyperosmotic stress and negatively affected erythritol production. Interestingly, the deletion strain yl-hog1Δ displayed significant morphological defects, with the cells growing in a filamentous form. Moreover, yl-hog1Δ cells were also resistant to the cell wall damaging agents Congo red and calcofluor white. Collectively, these results indicate that yl-Hog1 is crucial for the cellular response to hyperosmotic stress, plays a role in the induction of erythritol production, and potentially prevents cross-talk with different MAPK signalling pathways in the cell.
Author(s): Rzechonek DA, Day AM, Quinn J, Mironczuk AM
Publication type: Article
Publication status: Published
Journal: Scientific Reports
Online publication date: 03/10/2018
Acceptance date: 19/09/2018
ISSN (electronic): 2045-2322
Publisher: Nature Publishing Group
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