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XB-ART-8619
Trends Genet 2001 Aug 01;178:431-3. doi: 10.1016/s0168-9525(01)02370-8.
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Origin of an animal mitochondrial DNA polymerase subunit via lineage-specific acquisition of a glycyl-tRNA synthetase from bacteria of the Thermus-Deinococcus group.

Wolf YI , Koonin EV .


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Phylogenetic tree analysis shows that the accessory subunit animal mitochondrial DNA polymerase emerges as a result of horizontal transfer of the gene encoding glycyl-tRNA synthetase from a bacterium of the Thermus-Deinococcus group into the animal nuclear genome. This acquisition by a distinct eukaryotic lineage of a gene encoding a mitochondrial protein from a nonmitochondrial bacterial source underscores the contribution of different types of horizontal transfer event to the evolution of eukaryotes.

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Species referenced: Xenopus laevis
Genes referenced: mt-tr trna