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Mitochondrial mediation of environmental osmolytes discrimination during osmoadaptation in the extremely halotolerant black yeast Hortaea werneckiiFungal Genet Biol

Vaupotic, T. and Veranic, P. and Jenoe, P. and Plemenitas, A.. (2008) Mitochondrial mediation of environmental osmolytes discrimination during osmoadaptation in the extremely halotolerant black yeast Hortaea werneckiiFungal Genet Biol. Fungal Genetics and Biology, 45 (6). pp. 994-1007.

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Official URL: http://edoc.unibas.ch/46906/

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Abstract

We have investigated the mitochondrial responses to hyperosmotic environments of ionic (4.5 M NaCl) and non-ionic (3.0 M sorbitol) osmolytes in the most halo/osmo-tolerant black yeast, Hortaea werneckii. Adaptation to both types of osmolytes resulted in differential expression of mitochondria-related genes. Live-cell imaging has revealed a condensation of mitochondria in hyperosmotic media that depends on osmolyte type. In the hypersaline medium, this was accompanied by increased ATP synthesis and oxidative damage protection, whereas adaptation to the non-ionic osmolyte resulted in a decrease in ATP synthesis and lipid peroxidation level in mitochondria. A proteomic study of the mitochondria revealed preferential accumulation of energy metabolism enzymes in the hypersaline medium, and accumulation of protein chaperones in the non-ionic osmolyte. The HwBmh1/14-3-3 protein, localized to mitochondria in hypersaline conditions, and not at optimal salinity, suggesting its role in differential perception of ionic and non-ionic osmolytes in H. werneckii.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Services Biozentrum > Mass Spectrometry (Jenö)
UniBasel Contributors:Jenö, Paul and Moes, Suzanne
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:1087-1845
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:19 Dec 2017 10:48
Deposited On:19 Dec 2017 10:48

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