Proteobacteria

Abstract

The Proteobacteria constitute one of the major lineages (phyla) within the domain of the Bacteria. Although these Gram‐negative bacteria are phylogenetically related, they are physiologically, morphologically and ecologically extremely diverse. They are of great biological importance because they include various pathogens of humans, animals and plants, as well as a number of taxa that play key roles in the carbon, sulfur and nitrogen cycles on our planet.

Keywords: bacteria; Gram‐negative bacteria; Proteobacteria; purple bacteria; origin of mitochondria

Figure 1.

Neighbour‐joining phylogenetic tree of 16S rDNA sequences of some 120 selected Proteobacteria (mostly type strains of type species). Distances were calculated using the substitution rate calibration method in TREECON 1.3 (Van de Peer and De Wachter, ). Bacillus subtilis was used as outgroup (not shown). The bar indicates 10% estimated sequence divergence. Inclusion of genera in validly published families follows Garrity and Holt .

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Further Reading

Amann R (2000) Who is out there? Microbial aspects of biodiversity. Systematic and Applied Microbiology 23: 1–8.

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Kersters K, De Vos P, Gillis M et al. (2003) Introduction to the Proteobacteria. In: Dworkin M, Falkow S, Rosenberg E et al. (eds) The Prokaryotes. An Evolving Electronic Resource for the Microbiological Community, 3rd edn, release 3.12. New York: Springer. http://link.springer‐ny.com/link/service/books/10125/

Madigan MT, Martinko JM and Parker J (2003) Brock, Biology of Microorganisms, 10th edn. New York: Prentice‐Hall. [See particularly Chapters 12, 17 and 19].

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Kersters, Karel, De Vos, Paul, Gillis, Monique, and Swings, Jean(Apr 2006) Proteobacteria. In: eLS. John Wiley & Sons Ltd, Chichester. http://www.els.net [doi: 10.1038/npg.els.0004312]