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• W2186892664 abstract "ABSTRACT Mitochondrial evolution entailed the origin of protein import machinery that allows nuclear-encoded proteins to be targeted to the organelle, as well as the origin of cleavable N-terminal targeting sequences (NTS) that allow efficient sorting and import of matrix proteins. In hydrogenosomes and mitosomes, reduced forms of mitochondria with reduced proteomes, NTS-independent targeting of matrix proteins is known. Here, we studied the cellular localization of two glycolytic enzymes in the anaerobic pathogen Trichomonas vaginalis : PP i -dependent phosphofructokinase ( Tv PP i -PFK), which is the main glycolytic PFK activity of the protist, and ATP-dependent PFK ( Tv ATP-PFK), the function of which is less clear. Tv PP i -PFK was detected predominantly in the cytosol, as expected, while all four Tv ATP-PFK paralogues were imported into T. vaginalis hydrogenosomes, although none of them possesses an NTS. The heterologous expression of Tv ATP-PFK in Saccharomyces cerevisiae revealed an intrinsic capability of the protein to be recognized and imported into yeast mitochondria, whereas yeast ATP-PFK resides in the cytosol. Tv ATP-PFK consists of only a catalytic domain, similarly to “short” bacterial enzymes, while Sc ATP-PFK includes an N-terminal extension, a catalytic domain, and a C-terminal regulatory domain. Expression of the catalytic domain of Sc ATP-PFK and short Escherichia coli ATP-PFK in T. vaginalis resulted in their partial delivery to hydrogenosomes. These results indicate that Tv ATP-PFK and the homologous ATP-PFKs possess internal structural targeting information that is recognized by the hydrogenosomal import machinery. From an evolutionary perspective, the predisposition of ancient ATP-PFK to be recognized and imported into hydrogenosomes might be a relict from the early phases of organelle evolution." @default.
• W2186892664 created "2016-06-24" @default.
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• W2186892664 date "2015-12-01" @default.
• W2186892664 modified "2023-10-12" @default.
• W2186892664 title "N-Terminal Presequence-Independent Import of Phosphofructokinase into Hydrogenosomes of Trichomonas vaginalis" @default.
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• W2186892664 doi "https://doi.org/10.1128/ec.00104-15" @default.
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