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Dpc29 Promotes Mitochondrial Translation Post-Initation In Saccharomyces Cerevisiae, Kyle Andrew Hubble
Dpc29 Promotes Mitochondrial Translation Post-Initation In Saccharomyces Cerevisiae, Kyle Andrew Hubble
Graduate School of Biomedical Sciences Theses and Dissertations
Although the cytosolic and bacterial translation systems are well studied, much less is known about translation in mitochondria. In the yeast Saccharomyces cerevisiae, mitochondrial gene expression is predominately regulated by translational activators. These regulators are thought to promote translation by binding the elongated 5’-UTRs on their target mRNAs. Since mammalian mitochondrial mRNAs generally lack 5’-UTRs, they must regulate translation by other mechanisms. As expected, most yeast translational activators lack orthologues in mammals. Recently, a mitochondrial gene-specific translational activator, TACO1, was reported in mice and humans. To better define its role in mitochondrial translation I examined the yeast TACO1 orthologue, DPC29. …
Probing The Genetic Code With Leucine Trna Variants, Peter Anderson Hall
Probing The Genetic Code With Leucine Trna Variants, Peter Anderson Hall
Electronic Thesis and Dissertation Repository
Mistranslation is an error in protein synthesis whereby the amino acids specified by the genetic code are misplaced by others in the growing polypeptide chain. The anticodon of tRNALeu can be altered allowing for the misincorporation of leucine at non-leucine codons. Observing the effect of tRNALeu variants on the viability of yeast and mammalian cells will provide information on their ability to cause mistranslation and potential relationship to genetic diseases. To explore this, a random pool of tRNALeu anticodonvariants was expressed in Saccharomyces cerevisiae. Furthermore, three mutant tRNALeu already sequenced from humans were expressed in …