Magnetococcus marinus

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 crystal formed by biomineralisation, which allows the cells to orient along the Earth’s geomagnetic field.[1]

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

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

 
 
  Rickettsiales  
 

  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 3859672. PMID 24349502.
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