Structural and functional insights from the metagenome of an acidic hot spring microbial planktonic community in the Colombian Andes

A taxonomic and annotated functional description of microbial life was deduced from 53 Mb of metagenomic sequence retrieved from a planktonic fraction of the Neotropical high Andean (3,973 meters above sea level) acidic hot spring El Coquito (EC). A classification of unassembled metagenomic reads us...

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Veröffentlicht in:PloS one 2012-12, Vol.7 (12), p.e52069
Hauptverfasser: Jiménez, Diego Javier, Andreote, Fernando Dini, Chaves, Diego, Montaña, José Salvador, Osorio-Forero, Cesar, Junca, Howard, Zambrano, María Mercedes, Baena, Sandra
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container_issue 12
container_start_page e52069
container_title PloS one
container_volume 7
creator Jiménez, Diego Javier
Andreote, Fernando Dini
Chaves, Diego
Montaña, José Salvador
Osorio-Forero, Cesar
Junca, Howard
Zambrano, María Mercedes
Baena, Sandra
description A taxonomic and annotated functional description of microbial life was deduced from 53 Mb of metagenomic sequence retrieved from a planktonic fraction of the Neotropical high Andean (3,973 meters above sea level) acidic hot spring El Coquito (EC). A classification of unassembled metagenomic reads using different databases showed a high proportion of Gammaproteobacteria and Alphaproteobacteria (in total read affiliation), and through taxonomic affiliation of 16S rRNA gene fragments we observed the presence of Proteobacteria, micro-algae chloroplast and Firmicutes. Reads mapped against the genomes Acidiphilium cryptum JF-5, Legionella pneumophila str. Corby and Acidithiobacillus caldus revealed the presence of transposase-like sequences, potentially involved in horizontal gene transfer. Functional annotation and hierarchical comparison with different datasets obtained by pyrosequencing in different ecosystems showed that the microbial community also contained extensive DNA repair systems, possibly to cope with ultraviolet radiation at such high altitudes. Analysis of genes involved in the nitrogen cycle indicated the presence of dissimilatory nitrate reduction to N2 (narGHI, nirS, norBCDQ and nosZ), associated with Proteobacteria-like sequences. Genes involved in the sulfur cycle (cysDN, cysNC and aprA) indicated adenylsulfate and sulfite production that were affiliated to several bacterial species. In summary, metagenomic sequence data provided insight regarding the structure and possible functions of this hot spring microbial community, describing some groups potentially involved in the nitrogen and sulfur cycling in this environment.
doi_str_mv 10.1371/journal.pone.0052069
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Analysis of genes involved in the nitrogen cycle indicated the presence of dissimilatory nitrate reduction to N2 (narGHI, nirS, norBCDQ and nosZ), associated with Proteobacteria-like sequences. Genes involved in the sulfur cycle (cysDN, cysNC and aprA) indicated adenylsulfate and sulfite production that were affiliated to several bacterial species. In summary, metagenomic sequence data provided insight regarding the structure and possible functions of this hot spring microbial community, describing some groups potentially involved in the nitrogen and sulfur cycling in this environment.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23251687</pmid><doi>10.1371/journal.pone.0052069</doi><tpages>e52069</tpages><oa>free_for_read</oa></addata></record>
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subjects Algae
Annotations
Bacteria
Bacteria - classification
Bacteria - genetics
Biogeochemical cycles
Bioinformatics
Biology
Chloroplasts - genetics
Communities
Deoxyribonucleic acid
DNA
DNA repair
Ecology
Ecosystem
Ecosystems
Gene sequencing
Gene transfer
Gene Transfer, Horizontal
Genes
Genetics
Genomes
Genomics
High-altitude environments
Hot springs
Hot Springs - microbiology
Legionnaires' disease bacterium
Measuring instruments
Metagenome
Microalgae - genetics
Microorganisms
National parks
Nitrate reduction
Nitrification
Nitrogen
Nitrogen cycle
Plankton - classification
Plankton - genetics
Proteobacteria
RNA
RNA, Ribosomal, 16S - genetics
rRNA 16S
Sea level
Sequence Analysis, DNA - methods
Soil sciences
Structure-function relationships
Studies
Sulfite
Sulfur
Sulfur compounds
Sulfur cycle
Taxonomy
Transposase
U.V. radiation
Ultraviolet radiation
title Structural and functional insights from the metagenome of an acidic hot spring microbial planktonic community in the Colombian Andes
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