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Title: The Complete Genome and Physiological Analysis of the Eurythermal Firmicute Exiguobacterium chiriqhucha Strain RW2 Isolated From a Freshwater Microbialite, Widely Adaptable to Broad Thermal, pH, and Salinity Ranges

Journal Article · · Frontiers in Microbiology
 [1];  [2];  [3];  [3];  [2];  [4];  [3];  [5]
  1. Univ. of British Columbia, Vancouver, BC (Canada); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. McMaster Univ., Hamilton, ON (Canada)
  3. Univ. of British Columbia, Vancouver, BC (Canada)
  4. Bay Area Environmental Inst., Petaluma, CA (United States); NASA Ames Research Center, Moffett Field, CA (United States)
  5. Univ. of British Columbia, Vancouver, BC (Canada); Univ. of British Columbia, Vancouver, BC (Canada). Inst. for the Oceans and Fisheries

Members of the genus Exiguobacterium are found in diverse environments from marine and fresh waters to permafrost and hot springs. As such, they can grow at a wide range of temperature, pH, salinity, and heavy-metal concentrations. Here we propose Exiguobacterium pavilionensis sp. nov. strain RW2 using phylogenetic, biochemical, and genome analyses. Isolated from a cold freshwater microbialite in Pavilion Lake, British Columbia, E. pavilionensis can grow between 4 and 50 °C, the broadest temperature range reported for the genus. The three Mbp circular genome includes a large set of core genes associated with stress responses to temperature, salinity and heavy metals that are conserved among all sequenced strains of Exiguobacterium spp., and which may explain their distribution across such a wide range of ecosystems. We also nominate potential pathways involved in carbonate precipitation (and therefore microbialite formation), as well as carotenoid biosynthesis that could lend the characteristic orange color to members of the genus. The unexpectedly high thermal tolerance of this cold-water bacterium, as well as its latent flagellum synthesis operons, suggest that this species may have had its evolutionary origins in a much warmer environment in which motility was important. These results provide further insight into the potential of Exiguobacterium to exploit a wide range of environmental conditions.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1774145
Report Number(s):
PNNL-SA--124858
Journal Information:
Frontiers in Microbiology, Journal Name: Frontiers in Microbiology Vol. 9; ISSN 1664-302X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

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Changes of proteome components of Helicobacter pylori biofilms induced by serum starvation journal October 2013
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Biochemical characterization of psychrophilic Mn-superoxide dismutase from newly isolated Exiguobacterium sp. OS-77 journal January 2014
Exiguobacterium himgiriensis sp. nov. a novel member of the genus Exiguobacterium, isolated from the Indian Himalayas journal December 2012
Characterization of cadmium biosorption by Exiguobacterium sp. isolated from farmland soil near Cu-Pb-Zn mine journal March 2016
One-step methodology for the synthesis of FA picolinyl esters from intact lipids journal March 2002
Identification of the Unsaturated Heptadecyl Fatty Acids in the Seed Oils of Thespesia populnea and Gossypium hirsutum journal May 2012
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Exiguobacterium soli sp. nov., a psychrophilic bacterium from the McMurdo Dry Valleys, Antarctica journal October 2008
Exiguobacterium oxidotolerans sp. nov., a novel alkaliphile exhibiting high catalase activity journal November 2004
Exiguobacterium aestuarii sp. nov. and Exiguobacterium marinum sp. nov., isolated from a tidal flat of the Yellow Sea in Korea journal March 2005
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Bacterial osmoadaptation: the role of osmolytes in bacterial stress and virulence journal March 2002
Limnology of Pavilion Lake, B. C., Canada – Characterization of a microbialite forming environment journal January 2009
Comparative Characterization of the Microbial Diversities of an Artificial Microbialite Model and a Natural Stromatolite journal October 2008
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Strain-Specific Ureolytic Microbial Calcium Carbonate Precipitation journal August 2003
Complete Genome Sequence of the Thermophilic Bacterium Exiguobacterium sp. AT1b journal April 2011
Genome Sequence of Exiguobacterium antarcticum B7, Isolated from a Biofilm in Ginger Lake, King George Island, Antarctica journal November 2012
Genome Sequence of the Halophilic Archaeon Halococcus hamelinensis journal March 2012
Biosynthetic and Bioenergetic Functions of Citric Acid Cycle Reactions in Rhodopseudomonas capsulata journal January 1981
Practical procedure for demonstrating bacterial flagella. journal January 1982
First Draft Genome Sequence from a Member of the Genus Agrococcus, Isolated from Modern Microbialites journal June 2013
Draft Genome Sequence of the Polyextremophilic Exiguobacterium sp. Strain S17, Isolated from Hyperarsenic Lakes in the Argentinian Puna journal June 2013
Draft Genome Sequence of Exiguobacterium pavilionensis Strain RW-2, with Wide Thermal, Salinity, and pH Tolerance, Isolated from Modern Freshwater Microbialites journal June 2013
Genome Sequence of a Novel Polymer-Grade L-Lactate-Producing Alkaliphile, Exiguobacterium sp. Strain 8-11-1 journal June 2013
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Genome sequence-based species delimitation with confidence intervals and improved distance functions journal January 2013
The metagenomics RAST server – a public resource for the automatic phylogenetic and functional analysis of metagenomes journal September 2008
Architecture of thermal adaptation in an Exiguobacterium sibiricum strain isolated from 3 million year old permafrost: A genome and transcriptome approach journal January 2008
The RAST Server: Rapid Annotations using Subsystems Technology journal January 2008
Profiling the orphan enzymes journal January 2014
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Exposure of juvenile Leghorn chickens to lead acetate enhances antibiotic resistance in enteric bacterial flora journal April 2014
The arginine-ornithine antiporter ArcD contributes to biological fitness of Streptococcus suis journal August 2014
Genome comparison of two Exiguobacterium strains from high altitude andean lakes with different arsenic resistance: identification and 3D modeling of the Acr3 efflux pump journal July 2015
Benthic Cyanobacterial Mats in the High Arctic: Multi-Layer Structure and Fluorescence Responses to Osmotic Stress journal January 2012
Heavy metal driven co-selection of antibiotic resistance in soil and water bodies impacted by agriculture and aquaculture journal January 2012
Metagenomic analysis reveals that modern microbialites and polar microbial mats have similar taxonomic and functional potential journal September 2015
Metagenomic Analysis Suggests Modern Freshwater Microbialites Harbor a Distinct Core Microbial Community journal January 2016
Characterization of Pustular Mats and Related Rivularia-Rich Laminations in Oncoids From the Laguna Negra Lake (Argentina) journal May 2018
Viral Communities of Shark Bay Modern Stromatolites journal June 2018
The Complete Genome and Physiological Analysis of the Microbialite-Dwelling Agrococcus pavilionensis sp. nov; Reveals Genetic Promiscuity and Predicted Adaptations to Environmental Stress journal October 2018
Multiple Roles of Photosynthetic and Sunscreen Pigments in Cyanobacteria Focusing on the Oxidative Stress journal May 2013
Changes of proteome components of Helicobacter pylori biofilms induced by serum starvation journal October 2013
The genomic sequence of Exiguobacterium chiriqhucha str. N139 reveals a species that thrives in cold waters and extreme environmental conditions journal January 2017