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Genomic island genes in a coastal marine Synechococcus strain confer enhanced tolerance to copper and oxidative stress

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Genomic island genes in a coastal marine Synechococcus strain confer enhanced tolerance to copper and oxidative stress

Auteurs : Rhona K. Stuart [États-Unis] ; Bianca Brahamsha [États-Unis] ; Kayla Busby [États-Unis] ; Brian Palenik [États-Unis]

Source :

The ISME Journal [ 1751-7362 ] ; 2013.

RBID : PMC:3660668

Abstract

Highly variable regions called genomic islands are found in the genomes of marine picocyanobacteria, and have been predicted to be involved in niche adaptation and the ecological success of these microbes. These picocyanobacteria are typically highly sensitive to copper stress and thus, increased copper tolerance could confer a selective advantage under some conditions seen in the marine environment. Through targeted gene inactivation of genomic island genes that were known to be upregulated in response to copper stress in Synechococcus sp. strain CC9311, we found two genes (sync_1495 and sync_1217) conferred tolerance to both methyl viologen and copper stress in culture. The prevalence of one gene, sync_1495, was then investigated in natural samples, and had a predictable temporal variability in abundance at a coastal monitoring site with higher abundance in winter months. Together, this shows that genomic island genes can confer an adaptive advantage to specific stresses in marine Synechococcus, and may help structure their population diversity.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3660668

DOI: 10.1038/ismej.2012.175
PubMed: 23344240
PubMed Central: 3660668

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PMC:3660668

Le document en format XML

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 strain confer enhanced tolerance to copper and oxidative stress</title>
<author><name sortKey="Stuart, Rhona K" sort="Stuart, Rhona K" uniqKey="Stuart R" first="Rhona K" last="Stuart">Rhona K. Stuart</name>
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, La Jolla, CA,<country>USA</country>
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<author><name sortKey="Brahamsha, Bianca" sort="Brahamsha, Bianca" uniqKey="Brahamsha B" first="Bianca" last="Brahamsha">Bianca Brahamsha</name>
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<author><name sortKey="Busby, Kayla" sort="Busby, Kayla" uniqKey="Busby K" first="Kayla" last="Busby">Kayla Busby</name>
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, La Jolla, CA,<country>USA</country>
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<country xml:lang="fr">États-Unis</country>
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<author><name sortKey="Palenik, Brian" sort="Palenik, Brian" uniqKey="Palenik B" first="Brian" last="Palenik">Brian Palenik</name>
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 strain confer enhanced tolerance to copper and oxidative stress</title>
<author><name sortKey="Stuart, Rhona K" sort="Stuart, Rhona K" uniqKey="Stuart R" first="Rhona K" last="Stuart">Rhona K. Stuart</name>
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<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
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<author><name sortKey="Palenik, Brian" sort="Palenik, Brian" uniqKey="Palenik B" first="Brian" last="Palenik">Brian Palenik</name>
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, La Jolla, CA,<country>USA</country>
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<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
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<series><title level="j">The ISME Journal</title>
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<front><div type="abstract" xml:lang="en"><p>Highly variable regions called genomic islands are found in the genomes of marine picocyanobacteria, and have been predicted to be involved in niche adaptation and the ecological success of these microbes. These picocyanobacteria are typically highly sensitive to copper stress and thus, increased copper tolerance could confer a selective advantage under some conditions seen in the marine environment. Through targeted gene inactivation of genomic island genes that were known to be upregulated in response to copper stress in <italic>Synechococcus</italic>
 sp. strain CC9311, we found two genes (sync_1495 and sync_1217) conferred tolerance to both methyl viologen and copper stress in culture. The prevalence of one gene, sync_1495, was then investigated in natural samples, and had a predictable temporal variability in abundance at a coastal monitoring site with higher abundance in winter months. Together, this shows that genomic island genes can confer an adaptive advantage to specific stresses in marine <italic>Synechococcus,</italic>
 and may help structure their population diversity.</p>
</div>
</front>
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<pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
  <front><journal-meta><journal-id journal-id-type="nlm-ta">ISME J</journal-id>
<journal-id journal-id-type="iso-abbrev">ISME J</journal-id>
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</journal-title-group>
<issn pub-type="ppub">1751-7362</issn>
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<article-id pub-id-type="doi">10.1038/ismej.2012.175</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject>
</subj-group>
</article-categories>
<title-group><article-title>Genomic island genes in a coastal marine <italic>Synechococcus</italic>
 strain confer enhanced tolerance to copper and oxidative stress</article-title>
<alt-title alt-title-type="running"><italic>Synechococcus</italic>
 stress-tolerance genomic islands</alt-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Stuart</surname>
<given-names>Rhona K</given-names>
</name>
<xref ref-type="aff" rid="aff1">1</xref>
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<contrib contrib-type="author"><name><surname>Brahamsha</surname>
<given-names>Bianca</given-names>
</name>
<xref ref-type="aff" rid="aff1">1</xref>
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<contrib contrib-type="author"><name><surname>Busby</surname>
<given-names>Kayla</given-names>
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<xref ref-type="aff" rid="aff1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Palenik</surname>
<given-names>Brian</given-names>
</name>
<xref ref-type="aff" rid="aff1">1</xref>
<xref ref-type="corresp" rid="caf1">*</xref>
</contrib>
<aff id="aff1"><label>1</label>
<institution>Scripps Institution of Oceanography, University of California at San Diego</institution>
, La Jolla, CA,<country>USA</country>
</aff>
</contrib-group>
<author-notes><corresp id="caf1"><label>*</label>
<institution>Scripps Institution of Oceanography, University of California at San Diego</institution>
, La Jolla, CA 92093-0202, <country>USA</country>
. E-mail: <email>bpalenik@ucsd.edu</email>
</corresp>
</author-notes>
<pub-date pub-type="ppub"><month>06</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="epub"><day>24</day>
<month>01</month>
<year>2013</year>
</pub-date>
<volume>7</volume>
<issue>6</issue>
<fpage>1139</fpage>
<lpage>1149</lpage>
<history><date date-type="received"><day>01</day>
<month>08</month>
<year>2012</year>
</date>
<date date-type="rev-recd"><day>25</day>
<month>11</month>
<year>2012</year>
</date>
<date date-type="accepted"><day>29</day>
<month>11</month>
<year>2012</year>
</date>
</history>
<permissions><copyright-statement>Copyright © 2013 International Society for Microbial Ecology</copyright-statement>
<copyright-year>2013</copyright-year>
<copyright-holder>International Society for Microbial Ecology</copyright-holder>
</permissions>
<abstract><p>Highly variable regions called genomic islands are found in the genomes of marine picocyanobacteria, and have been predicted to be involved in niche adaptation and the ecological success of these microbes. These picocyanobacteria are typically highly sensitive to copper stress and thus, increased copper tolerance could confer a selective advantage under some conditions seen in the marine environment. Through targeted gene inactivation of genomic island genes that were known to be upregulated in response to copper stress in <italic>Synechococcus</italic>
 sp. strain CC9311, we found two genes (sync_1495 and sync_1217) conferred tolerance to both methyl viologen and copper stress in culture. The prevalence of one gene, sync_1495, was then investigated in natural samples, and had a predictable temporal variability in abundance at a coastal monitoring site with higher abundance in winter months. Together, this shows that genomic island genes can confer an adaptive advantage to specific stresses in marine <italic>Synechococcus,</italic>
 and may help structure their population diversity.</p>
</abstract>
<kwd-group><kwd>marine picocyanobacteria</kwd>
<kwd>copper</kwd>
<kwd>oxidative stress</kwd>
<kwd><italic>Synechococcus</italic>
</kwd>
<kwd>horizontal gene transfer</kwd>
<kwd>genomic islands</kwd>
</kwd-group>
</article-meta>
</front>
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</record>

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Genomic island genes in a coastal marine Synechococcus strain confer enhanced tolerance to copper and oxidative stress

Genomic island genes in a coastal marine Synechococcus strain confer enhanced tolerance to copper and oxidative stress

Source :

Abstract

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