Holosporaceae

The Holosporaceae are a family of bacteria, formerly included in the order Rickettsiales, but now raised to their own order, the Holosporales. The member Holospora is an intracellular parasite found in the unicellular protozoa Paramecium.[1]

Holosporaceae
Scientific classification
Kingdom:
Bacteria
Phylum:
Proteobacteria
Class:
Alphaproteobacteria
Subclass:
Caulobacteridae
Order:
Holosporales
Family:
Holosporaceae
Genera

Caedibacter
Holospora
Lyticum
Odyssella
Paracedibacter
Pseudocaedibacter
Pseudolyticum
Tectibacter

The genera Caedibacter, Holospora, Lyticum, Odyssella, Pseudocaedibacter, Pseudolyticum and Tectibacter are Incertae sedis.[1]

Genome

Draft genome sequences are available for three Holospora species [2] and Odyssella thessalonicensis [3] .[4]

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. [5] from the comparison of 16S + 23S ribosomal RNA sequences.

References
  1. Garrity, George M.; Brenner, Don J.; Krieg, Noel R.; Staley, James T. (eds.) (2005). Bergey's Manual of Systematic Bacteriology, Volume Two: The Proteobacteria, Part C: The Alpha-, Beta-, Delta-, and Epsilonproteobacteria. New York, New York: Springer. ISBN 978-0-387-24145-6.
  2. Dohra; et al. (2014). "Draft genome sequences of three Holospora species (Holospora obtusa, Holospora undulata, and Holospora elegans), endonuclear symbiotic bacteria of the ciliate Paramecium caudatum". FEMS Microbiol. Lett. 359 (1): 16–8. doi:10.1111/1574-6968.12577. PMID 25115770.
  3. Birtles, R. J; Rowbotham, T. J; Michel, R; Pitcher, D. G; Lascola, B; Alexiou-Daniel, S; Raoult, D (Jan 2000). "'Candidatus Odyssella thessalonicensis' gen. nov., sp. nov., an obligate intracellular parasite of Acanthamoeba species". Int J Syst Evol Microbiol. 50 (1): 63–72. doi:10.1099/00207713-50-1-63. PMID 10826788.
  4. Georgiades, K; Madoui, M. A; Le, P; Robert, C; Raoult, D (2011). "Phylogenomic analysis of Odyssella thessalonicensis fortifies the common origin of Rickettsiales, Pelagibacter ubique and Reclimonas americana mitochondrion". PLOS ONE. 6 (9): e24857. doi:10.1371/journal.pone.0024857. PMC 3177885. PMID 21957463.
  5. 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.
  • Holosporaceae J.P. Euzéby: List of Prokaryotic names with Standing in Nomenclature


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