Proto-mitochondrion
| Proto-mitochondrion | |
|---|---|
| Scientific classification | |
| Domain: | |
| Phylum: | |
| Class: | Alphaproteobacteria (or sister to)
|
| Order: | Rickettsiales (?)
|
The proto-mitochondrion is the hypothetical ancestral bacterial
mitochondria in eukaryotes are thought to descend, after an episode of symbiogenesis which created the aerobic
eukaryotes.
Phylogeny
The phylogenetic analyses of the few genes that are still encoded in the
mitochondria, there is no definitive evidence as to which alphaproteobacterial group the proto-mitochondrion emerged from. Martijn et al found mitochondria are a possible sister-group to all other alphaproteobacteria.[1] The phylogenetic tree of the Rickettsidae has been inferred by Ferla et al. from the comparison of 16S + 23S ribosomal RNA sequences.[2]
| Alphaproteobacteria |
| ||||||||||||||||||||||||||||||
Metabolism
Toni Gabaldón and Martijn Huynen (2003) reconstructed the
gene families derived from this organism can still be found in the 9 eukaryotic genomes analyzed in the study.[3]
See also
- Abiogenesis
- Endosymbiotic theory
- Hydrogenosome
- Midichloria
- Protocell
- Rickettsiales