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Mosaic nature of the mitochondrial proteome: Implications for the origin and evolution of mitochondria
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Mosaic nature of the mitochondrial proteome: Implications for the origin and evolution of mitochondria
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Journal Article
Mosaic nature of the mitochondrial proteome: Implications for the origin and evolution of mitochondria
2015
Overview
Comparative studies of the mitochondrial proteome have identified a conserved core of proteins descended from the α-proteobacterial endosymbiont that gave rise to the mitochondrion and was the source of the mitochondrial genome in contemporary eukaryotes. A surprising result of phylogenetic analyses is the relatively small proportion (10–20%) of the mitochondrial proteome displaying a clear α-proteobacterial ancestry. A large fraction of mitochondrial proteins typically has detectable homologs only in other eukaryotes and is presumed to represent proteins that emerged specifically within eukaryotes. A further significant fraction of the mitochondrial proteome consists of proteins with homologs in prokaryotes, but without a robust phylogenetic signal affiliating them with specific prokaryotic lineages. The presumptive evolutionary source of these proteins is quite different in contending models of mitochondrial origin.
Publisher
National Academy of Sciences,National Acad Sciences
