Class Alpha Proteobacteria | Phylum Proteobacteria | |
Similar Reclinomonas, Magnetococcus marinus, Midichloria, Jakobid, Pelagibacter ubique | ||
Bluescicon with dr sergio mu oz g mez specialization of the proto mitochondrion 2016 04 20
The proto-mitochondrion is the ancestral bacterial endosymbiont from which all mitochondria are thought to be derived.
Contents
- Bluescicon with dr sergio mu oz g mez specialization of the proto mitochondrion 2016 04 20
- Phylogeny
- Metabolism
- References
Phylogeny
The phylogenetic analyses of the few genes that are still encoded in the genomes of modern mitochondria suggest an alpha-proteobacterial origin for this endosymbiont. Although the order Rickettsiales has been proposed as the alpha-proteobacterial sister-group of mitochondria, there is no definitive evidence as to from which alpha-proteobacterial group the proto-mitochondrion emerged.
Metabolism
Toni Gabaldón and Martijn Huynen (2003) reconstructed the proteome (the entire set of proteins expressed by a genome) and corresponding metabolism of the proto-mitochondrion by comparing extant alpha-proteobacterial and eukaryotic genomes. They concluded that this organism was an aerobic alpha-proteobacterium catabolyzing lipids, glycerol and other compounds provided by the host. At least 630 gene families derived from this organism can still be found in the 9 eukaryotic genomes analyzed in the study.