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Xanthomonas citri

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Xanthomonas citri is a Gram-negative, rod-shaped bacterium. Although it is harmless for humans, it is a phytopathogen, known for being the causing agent of citrus canker.

Bacterial killing via a secretion system

Xanthomonas citri uses its type IV secretion system to kill other Gram-negative bacterial species in a contact-dependent manner. The secretion of the effector proteins requires a conserved C-terminal domain, and its bacteriolytic activity is neutralized by a cognate immunity protein.[1][2]

Defense against predators

Xanthomonas citri also uses type VI secretion system in defense against the predatory amoeba Dictyostelium discoideum.[3]

References

  1. ^ Souza DP, Oka GU, Alvarez-Martinez CE, Bisson-Filho AW, Dunger G, Hobeika L, Cavalcante NS, Alegria MC, Barbosa LR, Salinas RK, Guzzo CR, Farah CS (2015). "Bacterial killing via a type IV secretion system". Nature Communications. 6: 6453. Bibcode:2015NatCo...6.6453S. doi:10.1038/ncomms7453. PMID 25743609.
  2. ^ Sgro GG, Costa TR, Cenens W, Souza DP, Cassago A, Coutinho de Oliveira L, Salinas RK, Portugal RV, Farah CS, Waksman G (2018). "Cryo-EM structure of the bacteria-killing type IV secretion system core complex from Xanthomonas citri". Nature Microbiology. 3 (12): 1429–1440. doi:10.1038/s41564-018-0262-z. PMC 6264810. PMID 30349081.
  3. ^ Bayer-Santos, Ethel; Lima, Lídia dos Passos; Ceseti, Lucas de Moraes; Ratagami, Camila Yuri; de Santana, Eliane Silva; da Silva, Aline Maria; Farah, Chuck Shaker; Alvarez-Martinez, Cristina Elisa (2018). "Xanthomonas citri T6SS mediates resistance to Dictyostelium predation and is regulated by an ECF σ factor and cognate Ser/Thr kinase". Environmental Microbiology. 20 (4): 1562–1575. doi:10.1111/1462-2920.14085. ISSN 1462-2912. PMID 29488354. S2CID 3579518.
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Xanthomonas citri: Brief Summary

provided by wikipedia EN

Xanthomonas citri is a Gram-negative, rod-shaped bacterium. Although it is harmless for humans, it is a phytopathogen, known for being the causing agent of citrus canker.

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Xanthomonas citri ( French )

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Xanthomonas citri est une espèce de protéobactéries de la famille des Xanthomonadaceae. C'est une bactérie phytopathogène, responsable en particulier du chancre bactérien des agrumes.

Synonymes

Selon CAB International[2] :

  • Bacillus citri (Hasse) Holland 1920
  • Bacterium citri (Hasse) Doidge 1916
  • Phytomonas citri (Hasse) Bergey et al., 1923
  • Pseudomonas citri Hasse 1915
  • Xanthomonas axonopodis pv. aurantifolii Vauterin et al., 1995
  • Xanthomonas axonopodis pv. citri (ex Hasse 1915) Vauterin et al., 1995
  • Xanthomonas campestris pv. aurantifolii Gabriel et al., 1989
  • Xanthomonas campestris pv. citri (Hasse 1915) Dye 1978
  • Xanthomonas citri f.sp. aurantifolia Namekata & Oliveira 1972

Liste des sous-espèces, variétés et non-classés

Selon NCBI (20 septembre 2014)[3] :

Notes et références

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Xanthomonas citri: Brief Summary ( French )

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Xanthomonas citri est une espèce de protéobactéries de la famille des Xanthomonadaceae. C'est une bactérie phytopathogène, responsable en particulier du chancre bactérien des agrumes.

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Xanthomonas citri ( Portuguese )

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Xanthomonas citri é uma proteobactéria Gram-negativa em forma de bastonete. Embora inofensiva para o homem, é um fitopatógeno, conhecido por ser o agente causador do cancro cítrico.

Competição bacteriana via sistema de secreção

Xanthomonas citri usa seu sistema de secreção do tipo IV para matar outras espécies de bactérias.A secreção das proteínas efetoras requer um domínio C-terminal conservado, e sua atividade bacteriolítica é neutralizada por uma proteína de imunidade cognata.[1][2]

Defesa contra predadores

Xanthomonas citri usa o sistema de secreção do tipo VI na defesa contra a ameba predatória Dictyostelium discoideum.[3]

Referências

  1. «Bacterial killing via a type IV secretion system». Nature Communications. 6. 6453 páginas. 2015. PMID 25743609. doi:10.1038/ncomms7453
  2. «Cryo-EM structure of the bacteria-killing type IV secretion system core complex from Xanthomonas citri». Nature Microbiology. 3: 1429–1440. 2018. PMC . PMID 30349081
  3. «Xanthomonas citri T6SS mediates resistance to Dictyostelium predation and is regulated by an ECF σ factor and cognate Ser/Thr kinase». Environmental Microbiology. 20: 1562–1575. 2018. ISSN 1462-2912. PMID 29488354. doi:10.1111/1462-2920.14085
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Xanthomonas citri: Brief Summary ( Portuguese )

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Xanthomonas citri é uma proteobactéria Gram-negativa em forma de bastonete. Embora inofensiva para o homem, é um fitopatógeno, conhecido por ser o agente causador do cancro cítrico.

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