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Reductive Evolution of Mitochondria - Related Organelles in Anaerobic Protist
 Rada, Petr
Charles University in Prague, Faculty of Science Department of Parasitology Ph.D. study program: Parasitology Abstract of the Ph.D. Thesis Reductive Evolution of Mitochondria - Related Organelles in Anaerobic Protist Petr Rada Supervisor: Prof. RNDr. Jan Tachezy,Ph.D. Advisor: Doc. RNDr. Ivan Hrdý, Ph.D. Prague, 2011 ABSTRACT Trichomonas vaginalis and Giardia intestinalis are parasitic protists of the Excavata group. Both contain anaerobic forms of mitochondria called hydrogenosomes (Trichomonas) and mitosomes (Giardia). Hydrogenosomes produce hydrogen and ATP by substarte level phosphorylation and mitosomes represent the highly-reduced form of mitochondria that do not participate in cellular energy metabolism and ATP generation. Both types of organelles lost the majority of mitochondrial pathways and their genomes during the mitochondrion to hydrogenosome transition. Consequently, hydrogenosomes and mitosomes facilitate translocation of nuclearly encoded proteins into the matrix of the organelle as well as exchange of metabolites and ions across their membranes. Little is known about the membrane machineries required for the biogenesis of the organelle and metabolite exchange and the limited knowledge of mitosomal proteomes has been mostly gained from genomic analysis and localization studies of a few...
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