TY - JOUR
T1 - The genome of Bacillus coahuilensis reveals adaptations essential for survival in the relic of an ancient marine environment
AU - Alcaraz, Luis David
AU - Olmedo, Gabriela
AU - Bonilla, Germán
AU - Cerritos, René
AU - Hernández, Gustavo
AU - Cruz, Alfredo
AU - Ramírez, Enrique
AU - Putonti, Catherine
AU - Jiménez, Beatriz
AU - Martínez, Eva
AU - López, Varinia
AU - Arvizu, Jacqueline L.
AU - Ayala, Francisco
AU - Razo, Francisco
AU - Caballero, Juan
AU - Siefert, Janet
AU - Eguiarte, Luis
AU - Vielle, Jean Philippe
AU - Martínez, Octavio
AU - Souza, Valeria
AU - Herrera-Estrella, Alfredo
AU - Herrera-Estrella, Luis
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2008/4/15
Y1 - 2008/4/15
N2 - 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 (<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. 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.
AB - 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 (<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. 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.
KW - Evolution
KW - Genomic adaptation
KW - Horizontal gene transfer
KW - Phosphorus stress
KW - Sulfolipids
UR - http://www.scopus.com/inward/record.url?scp=44449128118&partnerID=8YFLogxK
U2 - 10.1073/pnas.0800981105
DO - 10.1073/pnas.0800981105
M3 - Article
C2 - 18408155
AN - SCOPUS:44449128118
VL - 105
SP - 5803
EP - 5808
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
SN - 0027-8424
IS - 15
ER -