genome of Bacillus coahuilensis reveals adaptations essential for survival in the relic of an ancient marine environment

The Cuatro Ciénegas Basin (CCB) in the central part of the Chihuahan desert (Coahuila, Mexico) hosts a wide diversity of microorganisms contained within springs thought to be geomorphological relics of an ancient sea. A major question remaining to be answered is whether bacteria from CCB are ancient...

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Veröffentlicht in:Proceedings of the National Academy of Sciences - PNAS 2008-04, Vol.105 (15), p.5803-5808
Hauptverfasser: Alcaraz, Luis David, Olmedo, Gabriela, Bonilla, Germán, Cerritos, René, Hernández, Gustavo, Cruz, Alfredo, Ramírez, Enrique, Putonti, Catherine, Jiménez, Beatriz, Martínez, Eva, López, Varinia, Arvizu, Jacqueline L, Ayala, Francisco, Razo, Francisco, Caballero, Juan, Siefert, Janet, Eguiarte, Luis, Vielle, Jean-Philippe, Martínez, Octavio, Souza, Valeria, Herrera-Estrella, Alfredo, Herrera-Estrella, Luis
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container_issue 15
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container_title Proceedings of the National Academy of Sciences - PNAS
container_volume 105
creator Alcaraz, Luis David
Olmedo, Gabriela
Bonilla, Germán
Cerritos, René
Hernández, Gustavo
Cruz, Alfredo
Ramírez, Enrique
Putonti, Catherine
Jiménez, Beatriz
Martínez, Eva
López, Varinia
Arvizu, Jacqueline L
Ayala, Francisco
Razo, Francisco
Caballero, Juan
Siefert, Janet
Eguiarte, Luis
Vielle, Jean-Philippe
Martínez, Octavio
Souza, Valeria
Herrera-Estrella, Alfredo
Herrera-Estrella, Luis
description The Cuatro Ciénegas Basin (CCB) in the central part of the Chihuahan desert (Coahuila, Mexico) hosts a wide diversity of microorganisms contained within springs thought to be geomorphological relics of an ancient sea. A major question remaining to be answered is whether bacteria from CCB are ancient marine bacteria that adapted to an oligotrophic system poor in NaCl, rich in sulfates, and with extremely low phosphorus levels (
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A major question remaining to be answered is whether bacteria from CCB are ancient marine bacteria that adapted to an oligotrophic system poor in NaCl, rich in sulfates, and with extremely low phosphorus levels (&lt;0.3 μM). Here, we report the complete genome sequence of Bacillus coahuilensis, a sporulating bacterium isolated from the water column of a desiccation lagoon in CCB. At 3.35 Megabases this is the smallest genome sequenced to date of a Bacillus species and provides insights into the origin, evolution, and adaptation of B. coahuilensis to the CCB environment. We propose that the size and complexity of the B. coahuilensis genome reflects the adaptation of an ancient marine bacterium to a novel environment, providing support to a "marine isolation origin hypothesis" that is consistent with the geology of CCB. This genomic adaptation includes the acquisition through horizontal gene transfer of genes involved in phosphorous utilization efficiency and adaptation to high-light environments. 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This genomic adaptation includes the acquisition through horizontal gene transfer of genes involved in phosphorous utilization efficiency and adaptation to high-light environments. The B. coahuilensis genome sequence also revealed important ecological features of the bacterial community in CCB and offers opportunities for a unique glimpse of a microbe-dominated world last seen in the Precambrian.</abstract><cop>United States</cop><pub>National Academy of Sciences</pub><pmid>18408155</pmid><doi>10.1073/pnas.0800981105</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record>
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subjects Adaptation, Physiological - genetics
Bacillus
Bacillus - genetics
Bacteria
Base Sequence
Basins
Biological adaptation
Biological Evolution
Biological Sciences
Cyanobacteria
Environment
Evolution
Gene Transfer, Horizontal
Genes, Bacterial
Genetic diversity
Genome, Bacterial
Genomes
Genomics
Light
Lipids
Microbiology
Microorganisms
Molecular Sequence Data
Phosphorus - metabolism
Ponds
Reverse transcriptase polymerase chain reaction
Seawater
Sequencing
title genome of Bacillus coahuilensis reveals adaptations essential for survival in the relic of an ancient marine environment
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