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

PeerJ

article

Ana Gutiérrez-Preciado¹  Carlos Vargas-Chávez¹  Mariana Reyes-Prieto¹  Omar F. Ordoñez³  Diego Santos-García¹  Tania Rosas-Pérez¹  Jorge Valdivia-Anistro⁵  Eria A. Rebollar⁷  Andrés Saralegui⁸  Andrés Moya¹  Enrique Merino⁹  María Eugenia Farías³  Amparo Latorre¹  Valeria Souza⁶ 

[1] Unidad de Genética Evolutiva, Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universidad de Valencia;Ecologie Systématique Evolution, CNRS, AgroParisTech, Université Paris Sud;Laboratorio de Investigaciones Microbiológicas de Lagunas Andinas;Department of Entomology, Hebrew University of Jerusalem;Carrera de Biología;Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México coyoacan;Department of Biology, James Madison University;Laboratorio Nacional de Microscopía Avanzada, Instituto de Biotecnología, Universidad Nacional Autónoma de México;Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México

关键词: High altitude Andean lakes;    Exiguobacterium;    Extremophiles;    Arsenic resistance;    Tryptophan biosynthesis;    Bacterial metabolism;    UV resistance;    Metals or metalloids;   

DOI  :  10.7717/peerj.3162

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

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.

【 授权许可】

CC BY