Phylogeny of ATP/ADP translocase gene from Candidatus Liberibacter spp., causal agents of HLB

Las bacterias causantes del huanglongbing (HLB), Canditatus Liberibacter spp., son bacterias obligadas al floema de los cítricos y a diferentes sistemas del insecto vector, Diaphorina citri, por lo tanto, el enfoque genómico ha sido útil para estudiar sus mecanismos de patogenicidad. Dicho enfoque ha permitido identificar una copia homóloga del gen codificante de la enzima ATP/ADP translocasa, la cual tiene la capacidad de importar ATP y nucleótidos desde el hospedante, causando un parasitismo de energía considerable. Esta enzima se ha relacionado con la actividad endoparasítica de patógenos animales y humanos más que con fitopatógenos. El presente trabajo analizó la relación evolutiva entre la secuencia de aminoácidos de la ATP/ADP translocasa entre diferentes especies de Ca. Liberibacter y grupos como Ricketssia sp. y Chlamydia sp. Análisis filogenéticos muestran que la variación en la secuencia del gen codificante de la enzima está delimitada en clados correspondientes a las especies de Ca. Liberibacter, sugiriendo que la variación en la enzima responde a un proceso coevolutivo con los hospederos. Asimismo, la filogenia muestra que el ancestro común más cercano a Ca. Liberibacter podría ser un endosimbionte no patogénico del género Ca. Midichloria. Análisis de conservación de la secuencia de aminoácidos muestran que existen varias posiciones en la secuencia que podrían estar relacionadas con la variación específica de esta enzima dentro de Ca. Liberibacter. Este trabajo presenta la hipótesis de que el origen evolutivo de la capacidad de parasitismo energético del género Ca. Liberibacter, causantes del HLB, es un endosimbionte no patogénico.

• Publication year

  2020

• Venue

  Revista Mexicana de Fitopatología Mexican Journal of Phytopathology

• Publication date

  2020-12-11

• Fields of study

  Not labeled

• Identifiers
  DOI 10.18781/r.mex.fit.2009-1
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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