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Genomic Variations Underlying Speciation and Niche Specialization of Shewanella baltica

Journal Article · · mSystems
 [1];  [2];  [3];  [4];  [4];  [5]
  1. East China Normal Univ. (ECNU), Shanghai (China); Michigan State Univ., East Lansing, MI (United States); DOE/OSTI
  2. Univ. of Nebraska, Lincoln, NE (United States)
  3. Georgia Inst. of Technology, Atlanta, GA (United States)
  4. Helmholtz Centre for Infection Research, Braunschweig (Germany)
  5. Michigan State Univ., East Lansing, MI (United States)

Shewanella baltica was the dominant culturable nitrate-reducing bacterium in the eutrophic and strongly stratified Baltic Sea in the 1980s, where it primarily inhabited the oxic-anoxic transition zone. The genomic structures of 46 of these isolates were investigated through comparative genomic hybridization (CGH), which revealed a gradient of genomic similarity, ranging from 65% to as high as 99%. The core genome of the S. baltica species was enriched in anaerobic respiration-associated genes. Auxiliary genes, most of which locate within a few genomic islands (GIs), were nonuniformly distributed among the isolates. Specifically, hypothetical and mobile genetic element (MGE)-associated genes dominated intraclade gene content differences, whereas gain/loss of functional genes drove gene content differences among less related strains. Among the major S. baltica clades, gene signatures related to specific redox-driven and spatial niches within the water column were identified. For instance, genes involved in anaerobic respiration of sulfur compounds may provide key adaptive advantages for clade A strains in anoxic waters where sulfur-containing electron acceptors are present. Genes involved in cell motility, in particular, a secondary flagellar biosynthesis system, may be associated with the free-living lifestyle by clade E strains. Collectively, this study revealed characteristics of genome variations present in the water column and active speciation of S. baltica strains, driven by niche partitioning and horizontal gene transfer (HGT).

Research Organization:
Michigan State Univ., East Lansing, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-07ER64389
OSTI ID:
1609945
Journal Information:
mSystems, Journal Name: mSystems Journal Issue: 5 Vol. 4; ISSN 2379-5077
Publisher:
American Society for MicrobiologyCopyright Statement
Country of Publication:
United States
Language:
English

References (47)

Phylogeny and Abundance of Novel Denitrifying Bacteria Isolated from the Water Column of the Central Baltic Sea journal October 2001
Unprecedented levels of horizontal gene transfer among spatially co-occurring Shewanella bacteria from the Baltic Sea journal July 2010
A phylogeny-driven genomic encyclopaedia of Bacteria and Archaea journal December 2009
Fifteen years of microbial genomics: meeting the challenges and fulfilling the dream journal July 2009
1,003 reference genomes of bacterial and archaeal isolates expand coverage of the tree of life journal June 2017
Horizontal gene transfer, genome innovation and evolution journal August 2005
Mobile genetic elements: the agents of open source evolution journal September 2005
CRISPR — a widespread system that provides acquired resistance against phages in bacteria and archaea journal March 2008
Towards environmental systems biology of Shewanella journal July 2008
Genomic islands in pathogenic and environmental microorganisms journal May 2004
Genomic insights that advance the species definition for prokaryotes journal February 2005
Comparative systems biology across an evolutionary gradient within the Shewanella genus journal September 2009
Complete genome sequence and analysis of Wolinella succinogenes journal September 2003
Complete Genome Structure of the Nitrogen-fixing Symbiotic Bacterium Mesorhizobium loti journal January 2000
Application of Phylogenetic Networks in Evolutionary Studies journal October 2005
Microbial species delineation using whole genome sequences journal July 2015
The Microbial Genomes Atlas (MiGA) webserver: taxonomic and gene diversity analysis of Archaea and Bacteria at the whole genome level journal June 2018
Sequences, sequence clusters and bacterial species
  • Hanage, William P.; Fraser, Christophe; Spratt, Brian G.
  • Philosophical Transactions of the Royal Society B: Biological Sciences, Vol. 361, Issue 1475 https://doi.org/10.1098/rstb.2006.1917
journal October 2006
Reclassification of Shewanella putrefaciens Owen's genomic group II as Shewanella baltica sp. nov. journal January 1998
The mercury resistance operon of the IncJ plasmid pMERPH exhibits structural and regulatory divergence from other Gramnegative mer operons journal February 1996
Specificity of motor components in the dual flagellar system of Shewanella putrefaciens CN-32: Specificity in dual flagellar systems journal December 2011
Pathogenicity islands: a molecular toolbox for bacterial virulence journal November 2006
Phylogenomics: Intersection of Evolution and Genomics journal June 2003
Divergence in Gene Regulation Contributes to Sympatric Speciation of Shewanella baltica Strains journal December 2017
Genotyping of heterotrophic bacteria from the central baltic sea by use of low-molecular-weight RNA profiles journal April 1996
Characterization of the cciIR Quorum-Sensing System in Burkholderia cenocepacia journal August 2005
Genome Sequencing of Five Shewanella baltica Strains Recovered from the Oxic-Anoxic Interface of the Baltic Sea journal February 2012
Nested Deletions of the SRL Pathogenicity Island ofShigella flexneri 2a journal October 2001
Global Transcriptome Analysis of Shewanella oneidensis MR-1 Exposed to Different Terminal Electron Acceptors journal September 2005
Ecology and Biotechnology of the Genus Shewanella journal October 2007
Stability and diversity of the genetic structure of a Shewanella putrefaciens population in the water column of the central Baltic journal January 1997
Nitrous oxide producing heterotrophic bacteria from the water column of the central Baltic: abundance and molecular identification journal January 1993
Interaction of enteropathogenicEscherichia coli with host epithelial cells journal June 1998
The Repetitive DNA Elements Called CRISPRs and Their Associated Genes: Evidence of Horizontal Transfer Among Prokaryotes journal April 2006
Mechanism of Cobyrinic Acid a , c -Diamide Synthetase from Salmonella typhimurium LT2 journal August 2004
Genome sequencing of environmental Escherichia coli expands understanding of the ecology and speciation of the model bacterial species journal April 2011
Secondary bacterial flagellar system improves bacterial spreading by increasing the directional persistence of swimming journal July 2014
Complete Genomic Sequence of Nitrogen-fixing Symbiotic Bacterium Bradyrhizobium japonicum USDA110 journal January 2002
Stability, genotypic and phenotypic diversity of S hewanella baltica in the redox transition zone of the Baltic Sea journal January 2014
How organic carbon derived from multiple sources contributes to carbon sequestration processes in a shallow coastal system? journal April 2015
Diversity and occurrence of Burkholderia spp. in the natural environment journal July 2008
Involvement of the Shewanella oneidensis Decaheme Cytochrome MtrA in the Periplasmic Stability of the β-Barrel Protein MtrB journal December 2010
Divergence in Gene Regulation Contributes to Sympatric Speciation of Shewanella baltica Strains journal December 2017
Characterization of the cciIR Quorum-Sensing System in Burkholderia cenocepacia journal August 2005
Genome Sequencing of Five Shewanella baltica Strains Recovered from the Oxic-Anoxic Interface of the Baltic Sea journal February 2012
Nested Deletions of the SRL Pathogenicity Island ofShigella flexneri 2a journal October 2001
Global Transcriptome Analysis of Shewanella oneidensis MR-1 Exposed to Different Terminal Electron Acceptors journal September 2005

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