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• W3207768259 abstract "Abstract Faithful inheritance of mitochondrial DNA (mtDNA) is crucial for cellular respiration/oxidative phosphorylation and mitochondrial membrane potential. However, how mtDNA is transmitted to progeny is not fully understood. We utilized hypersuppressive mtDNA, a class of respiratory deficient Saccharomyces cerevisiae mtDNA that is preferentially inherited over wild-type mtDNA ( rho+ ), to uncover the factors governing mtDNA inheritance. We found that regions of rho+ mtDNA persisted after hypersuppressive takeover indicating that hypersuppressive preferential inheritance may partially be due to active destruction of rho+ mtDNA. From a multicopy suppression screen, we found that overexpression of putative mitochondrial RNA exonuclease PET127 reduced hypersuppressive biased inheritance. This suppression required PET127 binding to the mitochondrial RNA polymerase RPO41 but not PET127 exonuclease activity. A temperature-sensitive allele of RPO41 improved rho+ mtDNA inheritance relative to hypersuppressive mtDNA at semi-permissive temperatures revealing a previously unknown role for rho+ transcription in promoting hypersuppressive mtDNA inheritance." @default.
• W3207768259 created "2021-10-25" @default.
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• W3207768259 date "2021-04-06" @default.
• W3207768259 modified "2023-10-18" @default.
• W3207768259 title "Decreasing Mitochondrial RNA Polymerase Activity Reverses Biased Inheritance of Hypersuppressive mtDNA" @default.
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• W3207768259 doi "https://doi.org/10.1101/2021.04.05.438502" @default.
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