title: Expression of Bax in yeast affects not only the mitochondria but also vacuolar integrity and intracellular protein traffic.
abstract: Bax-induced lethality in yeast is accompanied by morphological changes in mitochondria, giving rise to a reduced number of swollen tubules. Although these changes are completely abolished upon coexpression of the Bax inhibitor, Bcl-2, coexpression of Bax with Bax inhibiting-glutathione S-transferase (BI-GST) leads to aggregation, but not fusion of the mitochondria. In addition, Bax affects the integrity of yeast vacuoles, resulting in the disintegration and eventual loss of the organelles, and the disruption of intracellular protein traffic. While Bcl-2 coexpression only partially corrects this phenotype, coexpression of BI-GST fully restores the organelles, indicating a different mode of protection exerted by Bcl-2 and BI-GST.
authors.affiliation: Department of Natural Products, Mediterranean Agronomic Institute of Chania, P.O. Box 85, Chania 73100, Greece.
authors.forename: Irina
authors.initials: I
authors.lastname: Dimitrova
authors.forename: Garabet G
authors.initials: GG
authors.lastname: Toby
authors.forename: Esmerina
authors.initials: E
authors.lastname: Tili
authors.forename: Randy
authors.initials: R
authors.lastname: Strich
authors.forename: Sotirios C
authors.initials: SC
authors.lastname: Kampranis
authors.forename: Antonios M
authors.initials: AM
authors.lastname: Makris
mesh_terms: D002470:Cell Survival; D015870:Gene Expression; D005982:Glutathione Transferase / Q000235:genetics / Q000378:metabolism; D049452:Green Fluorescent Proteins; D007425:Intracellular Membranes / Q000378:metabolism; D008164:Luminescent Proteins / Q000235:genetics; D008856:Microscopy, Fluorescence; D008928:Mitochondria / Q000378:metabolism* / Q000648:ultrastructure; D021381:Protein Transport; D011518:Proto-Oncogene Proteins / Q000037:antagonists & inhibitors / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000235:genetics / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D011994:Recombinant Proteins / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism; D014617:Vacuoles / Q000378:metabolism* / Q000648:ultrastructure; D015003:Yeasts / Q000166:cytology / Q000235:genetics / Q000378:metabolism*; D051028:bcl-2-Associated X Protein
chemical_list: D008164:Luminescent Proteins; D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D017382:Reactive Oxygen Species; D011994:Recombinant Proteins; D051028:bcl-2-Associated X Protein; D049452:Green Fluorescent Proteins; D005982:Glutathione Transferase