Parabacteroides is a Gram-negative, anaerobic, non-spore-forming genus from the family Tannerellaceae.
First isolated from fecal specimen in 1933, type strain Parabacteroides distasonis was originally classified under the name Bacteroides distasonis.
Within the Parabacteroides genus, species P. distasonis and P. goldsteinii have been associated with beneficial effects in human health, relating to their integral role in gut microbiota along the digestive tract.
Taxonomy
The taxon ID number used for prokaryotic genus
Parabacteroides is 516255.
Parent taxon comes from bacterial family
Tannerellaceae, identified by number 29533 in the online
LPSN database.
Genomics
The genomes of
Parabacteroides are highly variable, both across species and within a single strain. For example, genomes isolated from type strain
P. distasonis range in size from approximately 4.5 to 5.2 Mb (
megabases) and encode over 2,000 functional
Protein, signifying substantial variation within the species.
Species
The genus
Parabacteroides comprises the following species, 11 of which are validly published by the List of Prokaryotic names with Standing in Nomenclature (LPSN):
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!Validly Named by the LPSN |
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P. acidifaciens Wang et al. 2019
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P. chartae Tan et al. 2012
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P. chinchillae Kitahara et al. 2013
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P. chongii Kim et al. 2019
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P. distasonis (Eggerth and Gagnon 1933) Sakamoto and Benno 2006
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P. faecis Sakamoto et al. 2015
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P. goldsteinii (Song et al. 2006) Sakamoto and Benno 2006
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P. gordonii Sakamoto et al. 2009
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P. hominis Liu et al. 2022
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P. johnsonii Sakamoto et al. 2007
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P. merdae (Johnson et al. 1986) Sakamoto and Benno 2006
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P. bouchesdurhonensis Dione et al. 2018
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P. faecavium Gilroy et. al 2021
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P. intestinavium Gilroy et al. 2021
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P. intestinigallinarum Gilroy et al. 2021
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P. intestinipullorum Gilroy et al. 2021
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P. massiliensis Bellali et al. 2019
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P. pacaensis Benabdelkader et al. 2020
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P. pekinense Li et al. 2022
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P. provencensis Benabdelkader et al. 2020
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P. timonensis Bilen et al. 2019
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Role in the human gut microenvironment
Part of the bacterial order
Bacteroidales present in the
Gut microbiota , Parabacteroides are commonly found within the gut microenvironment.
Parabacteroides species constitute a significant component of
Human microbiota along the digestive tract, benefitting from a
Commensalism with the human body. Intestinal microbiota also benefit the human host, modulating essential metabolism-related processes within the gut microenvironment.
P. distasonis and P. goldsteinii in particular form Biofilm in the Gut flora, allowing these species to survive under harsh conditions and maintain ample populations in extreme pH environments.
Further reading
