Reference: Stumpf JD and Copeland WC (2013) The Exonuclease Activity of the Yeast Mitochondrial DNA Polymerase ? Suppresses Mitochondrial DNA Deletions Between Short Direct Repeats in Saccharomyces cerevisiae. Genetics 194(2):519-22

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Abstract

The importance of mitochondrial DNA (mtDNA) deletions in the progeroid phenotype of exonuclease-deficient DNA polymerase ? mice has been intensely debated. We show that disruption of Mip1 exonuclease activity increases mtDNA deletions 160-fold, whereas disease-associated polymerase variants were mostly unaffected, suggesting that exonuclease activity is vital to avoid deletions during mtDNA replication.

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Journal Article
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Stumpf JD, Copeland WC
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