The genomic sequence of Exiguobacterium chiriqhucha str. N139 reveals a species that thrives in cold waters and extreme environmental conditions - Archive ouverte HAL Access content directly
Journal Articles PeerJ Year : 2017

The genomic sequence of Exiguobacterium chiriqhucha str. N139 reveals a species that thrives in cold waters and extreme environmental conditions

Carlos Vargas-Chávez
Mariana Reyes-Prieto
  • Function : Author
Omar F Ordoñez
  • Function : Author
Tania Rosas-Pérez
  • Function : Author
Jorge Valdivia-Anistro
  • Function : Author
Eria A Rebollar
  • Function : Author
Andrés Saralegui
  • Function : Author
Andrés Moya
  • Function : Author
Enrique Merino
  • Function : Author
María Eugenia Farías
  • Function : Author
Amparo Latorre
  • Function : Author
  • PersonId : 1103233
Valeria Souza
  • Function : Author
  • PersonId : 1103236

Abstract

We report the genome sequence of Exiguobacterium chiriqhucha str. N139, isolated from a high-altitude Andean lake. Comparative genomic analyses of the Exiguobacterium genomes available suggest that our strain belongs to the same species as the previously reported E. pavilionensis str. RW-2 and Exiguobacterium str. GIC 31. We describe this species and propose the chiriqhucha name to group them. ‘Chiri qhucha’ in Quechua means ‘cold lake’, which is a common origin of these three cosmopolitan Exiguobacteria. The 2,952,588-bp E. chiriqhucha str. N139 genome contains one chromosome and three megaplasmids. The genome analysis of the Andean strain suggests the presence of enzymes that confer E. chiriqhucha str. N139 the ability to grow under multiple environmental extreme conditions, including high concentrations of different metals, high ultraviolet B radiation, scavenging for phosphorous and coping with high salinity. Moreover, the regulation of its tryptophan biosynthesis suggests that novel pathways remain to be discovered, and that these pathways might be fundamental in the amino acid metabolism of the microbial community from Laguna Negra, Argentina.
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hal-03270182 , version 1 (24-06-2021)

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Ana Gutiérrez-Preciado, Carlos Vargas-Chávez, Mariana Reyes-Prieto, Omar F Ordoñez, Diego Santos-García, et al.. The genomic sequence of Exiguobacterium chiriqhucha str. N139 reveals a species that thrives in cold waters and extreme environmental conditions. PeerJ, 2017, 5, pp.e3162. ⟨10.7717/peerj.3162⟩. ⟨hal-03270182⟩

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