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Magnetococcus marinus

Magnetococcus marinus
Scientific classification
Domain: Bacteria
Phylum: Proteobacteria
Class: Alphaproteobacteria
Subclass: Magnetococcidae
Order: Magnetococcales
Family: Magnetococcaceae
Genus: Magnetococcus

Magnetococcus marinus is a species of Alphaproteobacteria that has the peculiar ability to form a structure called a magnetosome, a membrane encased single-magnetic-domain mineral crystals formed by biomineralisation, which allows the cells to orientate along the Earth’s geomagnetic field.[1]

It is a basal group in the Alphaproteobacteria.

Schematic ribosomal RNA phylogeny of Alphaproteobacteria
  Magnetococcidae  

  Magnetococcus marinus

  Caulobacteridae  

  Rhodospirillales, Sphingomonadales,
  Rhodobacteraceae, Rhizobiales, etc.

  Holosporales

  Rickettsidae  
  Pelagibacterales  
  Pelagibacteraceae  

  Pelagibacter

  Subgroups Ib, II, IIIa, IIIb, IV and V

  Proto-mitochondria

  Anaplasmataceae  

  Ehrlichia

  Anaplasma

  Wolbachia

  Neorickettsia

  Midichloriaceae  

  Midichloria

  Rickettsiaceae  

  Rickettsia

  Orientia

The cladogram of Rickettsidae has been inferred by Ferla et al. [2] from the comparison of 16S + 23S ribosomal RNA sequences.

References

  1. ^ Bazylinski, D. A.; Williams, T. J.; Lefevre, C. T.; Berg, R. J.; Zhang, C. L.; Bowser, S. S.; Dean, A. J.; Beveridge, T. J. (2012). "Magnetococcus marinus gen. nov., sp. nov., a marine, magnetotactic bacterium that represents a novel lineage (Magnetococcaceae fam. Nov., Magnetococcales ord. Nov.) at the base of the Alphaproteobacteria". International Journal of Systematic and Evolutionary Microbiology. 63 (Pt 3): 801–8. doi:10.1099/ijs.0.038927-0. PMID 22581902. 
  2. ^ Ferla MP, Thrash JC, Giovannoni SJ, Patrick WM (2013). "New rRNA gene-based phylogenies of the Alphaproteobacteria provide perspective on major groups, mitochondrial ancestry and phylogenetic instability". PloS One. 8 (12): e83383. doi:10.1371/journal.pone.0083383. PMC 3859672Freely accessible. PMID 24349502.