Gammaproteobacteria

Gammaproteobacteria
Vibrio cholerae
Scientific classification Edit this classification
Domain: Bacteria
Phylum: Pseudomonadota
Class: Gammaproteobacteria
Garrity et al. 2005
Orders
Synonyms
  • "Chromatiia" Cavalier-Smith 2020

Gammaproteobacteria is a class of bacteria in the phylum Pseudomonadota (synonym Proteobacteria). It contains about 250 genera, which makes it the most genus-rich taxon of the Prokaryotes.[1] Several medically, ecologically, and scientifically important groups of bacteria belong to this class. All members of this class are Gram-negative. It is the most phylogenetically and physiologically diverse class of the Pseudomonadota.[2]

Members of Gammaproteobacteria live in several terrestrial and marine environments, in which they play various important roles, including in extreme environments such as hydrothermal vents. They can have different shapes, rods, curved rods, cocci, spirilla, and filaments,[3] and include free living bacteria, biofilm formers, commensals and symbionts;[4] some also have the distinctive trait of being bioluminescent.[5] Diverse metabolisms are found in Gammaproteobacteria; there are both aerobic and anaerobic (obligate or facultative) species, chemolithoautotrophics, chemoorganotrophics, photoautotrophs and heterotrophs.[6]

  1. ^ Garrity GM, Bell JA, Lilburn TG. (2005). Class III. Gammaproteobacteria class. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds) Bergey's Manual of Systematic Bacteriology 2nd edn, vol. 2 Springer: New York, p 1
  2. ^ T. Gutierrez – 2019 - Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
  3. ^ Schulz HN, Brinkhoff T, Ferdelman TG, Mariné MH, Teske A, Jorgensen BB (April 1999). "Dense populations of a giant sulfur bacterium in Namibian shelf sediments". Science. 284 (5413): 493–5. Bibcode:1999Sci...284..493S. doi:10.1126/science.284.5413.493. PMID 10205058.
  4. ^ Williams KP, Gillespie JJ, Sobral BW, Nordberg EK, Snyder EE, Shallom JM, Dickerman AW (May 2010). "Phylogeny of gammaproteobacteria". Journal of Bacteriology. 192 (9): 2305–14. doi:10.1128/JB.01480-09. PMC 2863478. PMID 20207755.
  5. ^ Munn CB (2019-11-26). Marine Microbiology: Ecology & Applications. CRC Press. ISBN 978-0-429-59236-2.
  6. ^ "Proteobacteria | Microbiology". Nursing Hero (study guide). 2016.