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Mycolicibacillus ( englanti )

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Mycolicibacillus is a genus of Gram-Positive rod-shaped bacteria in the family Mycobacteriaceae from the order Mycobacteriales.[1]

Members of Mycolicibacillus were demarcated from the larger genus Mycobacterium in 2018 by Gupta et al. based on evidence from various phylogenetic trees constructed based on conserved genome sequences, comparative genomic analyses and average amino acid identity values.[1] In addition to this genus, the study proposed the division of Mycobacterium into a total of five distinct genera, which was met with some resistance by some of the scientific community. The resistance was based on the grounds that Mycobacterium contains some clinically relevant species and name changes might cause confusion among clinicians and other researchers.[3]

In 2020, Yamada et al. analyzed the fundamental morphological properties of the new genera, including the cell diameter, cell length, cell perimeter, cell circularity and aspect ratio, and determined that there were significant differences between the five genera, thus supporting the new division.[4]

The name Mycolicibacillus is derived from the Latin noun acidum mycolicum (translates to mycolic acid) and the Latin noun bacillus (translates to small staff or rod). Together the name refers to a genus of mycolic acid-containing, rod-shaped bacteria.[1]

Biochemical characteristics and molecular signatures[1]

While majority of the genus are slow growing bacteria species (taking more than seven days to form colonies), some do display intermediate growth rates (taking 5–15 days to form colonies). All species are nonchromogenic. Species are not thought to be pathogenic, although some have been isolated form human patients with pulmonary dysfunction. The genome size for the members of Mycolicibacillus ranges from 3.89–4.08 Mbp and their G+C content is 69.4 mol%. 22 unique conserved signature proteins (CSPs) were identified for this genus.

Phylogeny

The phylogeny of Mycolicibacillus is based on 16S rRNA analysis.[1]

Mycolicibacillus

Mycolicibacillus koreensis

Mycolicibacillus parakoreensis

Mycolicibacillus trivialis

Mycolicibacter (outgroup)

References

  1. ^ a b c d e f Gupta, Radhey S.; Lo, Brian; Son, Jeen (2018-02-13). "Phylogenomics and Comparative Genomic Studies Robustly Support Division of the Genus Mycobacterium into an Emended Genus Mycobacterium and Four Novel Genera". Frontiers in Microbiology. 9: 67. doi:10.3389/fmicb.2018.00067. ISSN 1664-302X. PMC 5819568. PMID 29497402.
  2. ^ Euzéby JP, Parte AC. "Mycolicibacillus". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved June 25, 2022.
  3. ^ Tortoli, Enrico; Brown-Elliott, Barbara A.; Chalmers, James D.; Cirillo, Daniela M.; Daley, Charles L.; Emler, Stefan; Floto, R. Andres; Garcia, Maria J.; Hoefsloot, Wouter; Koh, Won-Jung; Lange, Christoph (2019-07-01). "Same meat, different gravy: Ignore the new names of mycobacteria". European Respiratory Journal. 54 (1). doi:10.1183/13993003.00795-2019. ISSN 0903-1936. PMID 31296783. S2CID 195893005.
  4. ^ Yamada, Hiroyuki; Chikamatsu, Kinuyo; Aono, Akio; Murata, Kazuyoshi; Miyazaki, Naoyuki; Kayama, Yoko; Bhatt, Apoorva; Fujiwara, Nagatoshi; Maeda, Shinji; Mitarai, Satoshi (2020). "Fundamental Cell Morphologies Examined With Cryo-TEM of the Species in the Novel Five Genera Robustly Correlate With New Classification in Family Mycobacteriaceae". Frontiers in Microbiology. 11: 562395. doi:10.3389/fmicb.2020.562395. ISSN 1664-302X. PMC 7701246. PMID 33304323.
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Mycolicibacillus: Brief Summary ( englanti )

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Mycolicibacillus is a genus of Gram-Positive rod-shaped bacteria in the family Mycobacteriaceae from the order Mycobacteriales.

Members of Mycolicibacillus were demarcated from the larger genus Mycobacterium in 2018 by Gupta et al. based on evidence from various phylogenetic trees constructed based on conserved genome sequences, comparative genomic analyses and average amino acid identity values. In addition to this genus, the study proposed the division of Mycobacterium into a total of five distinct genera, which was met with some resistance by some of the scientific community. The resistance was based on the grounds that Mycobacterium contains some clinically relevant species and name changes might cause confusion among clinicians and other researchers.

In 2020, Yamada et al. analyzed the fundamental morphological properties of the new genera, including the cell diameter, cell length, cell perimeter, cell circularity and aspect ratio, and determined that there were significant differences between the five genera, thus supporting the new division.

The name Mycolicibacillus is derived from the Latin noun acidum mycolicum (translates to mycolic acid) and the Latin noun bacillus (translates to small staff or rod). Together the name refers to a genus of mycolic acid-containing, rod-shaped bacteria.

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Mycolicibacillus ( ranska )

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Mycolicibacillus est un genre de Mycobactéries créé en 2018 à la suite de la révision du genre Mycobacterium par R.S. Gupta et al.[1] Cette création a été reprise par une publication dans l'IJSEM, validant ainsi les nouveaux noms binomiaux[2].

Liste d'espèces

Selon la LPSN

Provisoirement surnommé « clade Triviale » par ses auteurs, ce nouveau taxon est le plus petit des quatre nouveaux genres créés à cette occasion. Avec Mycolicibacter c'est aussi l'un des deux les plus proches du nouveau genre Mycobacterium et il se compose exclusivement d'espèces auparavant classées dans celui-ci[3] :

Ces nouveaux noms binomiaux sont des synonymes. Comme l'ont souligné plusieurs microbiologistes spécialistes, l'usage des anciens noms binomiaux (avec « Mycobacterium » à la place de « Mycolicibacillus ») est toujours admis[4],[5].

Notes et références

  1. Gupta RS et al. « Phylogenomics and Comparative Genomic Studies Robustly Support Division of the Genus Mycobacterium into an Emended Genus Mycobacterium and Four Novel Genera » Front Microbiol. 2108 Feb;9:67. Accès libre.
  2. Oren A & Garrity G « List of new names and new combinations previously effectively, but not validly, published » Int J Syst Evol Microbiol. 2018 May;68(5):1411-1417. Accès libre.
  3. https://lpsn.dsmz.de/genus/mycolicibacillus, consulté le 16/01/21.
  4. Tortoli E et al. « Same meat, different gravy: ignore the new names of mycobacteria » Eur Respir J. 2019 Jul;54(1):1900795. Accès libre.
  5. Oren A & Trujillo ME « On the valid publication of names of mycobacteria » Eur Respir J 2019 Oct;54(4):1901483. doi: 10.1183/13993003.01483-2019.
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Mycolicibacillus: Brief Summary ( ranska )

tarjonnut wikipedia FR

Mycolicibacillus est un genre de Mycobactéries créé en 2018 à la suite de la révision du genre Mycobacterium par R.S. Gupta et al. Cette création a été reprise par une publication dans l'IJSEM, validant ainsi les nouveaux noms binomiaux.

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