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Expansion of Genes Encoding piRNA-Associated Argonaute Proteins in the Pea Aphid: Diversification of Expression Profiles in Different Plastic Morphs

Identifieur interne : 006155 ( Main/Exploration ); précédent : 006154; suivant : 006156

Expansion of Genes Encoding piRNA-Associated Argonaute Proteins in the Pea Aphid: Diversification of Expression Profiles in Different Plastic Morphs

Auteurs : Hsiao-Ling Lu [Taïwan] ; Sylvie Tanguy [France] ; Claude Rispe [France] ; Jean-Pierre Gauthier [France] ; Tom Walsh [Australie] ; Karl Gordon [Australie] ; Owain Edwards [Australie] ; Denis Tagu [France] ; Chun-Che Chang [Taïwan] ; Stéphanie Jaubert-Possamai [France]

Source :

RBID : PMC:3230593

Abstract

Piwi-interacting RNAs (piRNAs) are known to regulate transposon activity in germ cells of several animal models that propagate sexually. However, the role of piRNAs during asexual reproduction remains almost unknown. Aphids that can alternate sexual and asexual reproduction cycles in response to seasonal changes of photoperiod provide a unique opportunity to study piRNAs and the piRNA pathway in both reproductive modes. Taking advantage of the recently sequenced genome of the pea aphid Acyrthosiphon pisum, we found an unusually large lineage-specific expansion of genes encoding the Piwi sub-clade of Argonaute proteins. In situ hybridisation showed differential expressions between the duplicated piwi copies: while Api-piwi2 and Api-piwi6 are “specialised” in germ cells their most closely related copy, respectively Api-piwi5 and Api-piwi3, are expressed in the somatic cells. The differential expression was also identified in duplicated ago3: Api-ago3a in germ cells and Api-ago3b in somatic cells. Moreover, analyses of expression profiles of the expanded piwi and ago3 genes by semi-quantitative RT-PCR showed that expressions varied according to the reproductive types. These specific expression patterns suggest that expanded aphid piwi and ago3 genes have distinct roles in asexual and sexual reproduction.


Url:
DOI: 10.1371/journal.pone.0028051
PubMed: 22162754
PubMed Central: 3230593


Affiliations:


Links toward previous steps (curation, corpus...)


Le document en format XML

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<country xml:lang="fr">France</country>
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<wicri:noRegion>Le Rheu</wicri:noRegion>
<wicri:noRegion>Le Rheu</wicri:noRegion>
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<name sortKey="Walsh, Tom" sort="Walsh, Tom" uniqKey="Walsh T" first="Tom" last="Walsh">Tom Walsh</name>
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<nlm:aff id="aff3">
<addr-line>CSIRO (Commonwealth Scientific and Industrial Research Organisation) Ecosystem Sciences, Canberra, Australia</addr-line>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea>CSIRO (Commonwealth Scientific and Industrial Research Organisation) Ecosystem Sciences, Canberra</wicri:regionArea>
<wicri:noRegion>Canberra</wicri:noRegion>
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<name sortKey="Gordon, Karl" sort="Gordon, Karl" uniqKey="Gordon K" first="Karl" last="Gordon">Karl Gordon</name>
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<wicri:noRegion>Canberra</wicri:noRegion>
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<name sortKey="Edwards, Owain" sort="Edwards, Owain" uniqKey="Edwards O" first="Owain" last="Edwards">Owain Edwards</name>
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<addr-line>CSIRO Ecosystem Sciences, Wembley, Australia</addr-line>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea>CSIRO Ecosystem Sciences, Wembley</wicri:regionArea>
<wicri:noRegion>Wembley</wicri:noRegion>
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<name sortKey="Tagu, Denis" sort="Tagu, Denis" uniqKey="Tagu D" first="Denis" last="Tagu">Denis Tagu</name>
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<addr-line>UMR (Unité Mixte de Recherche) 1099 BiO3P (Biologie des Organismes et des Population appliquée à la Protection des Plantes) INRA (Institut National de la Rechercher Agronomique) – Agrocampus – Université Rennes1, Le Rheu, France</addr-line>
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<wicri:noRegion>Le Rheu</wicri:noRegion>
<wicri:noRegion>Le Rheu</wicri:noRegion>
</affiliation>
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<name sortKey="Chang, Chun Che" sort="Chang, Chun Che" uniqKey="Chang C" first="Chun-Che" last="Chang">Chun-Che Chang</name>
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<addr-line>Department of Entomology/Institute of Biotechnology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan</addr-line>
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</nlm:aff>
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<name sortKey="Jaubert Possamai, Stephanie" sort="Jaubert Possamai, Stephanie" uniqKey="Jaubert Possamai S" first="Stéphanie" last="Jaubert-Possamai">Stéphanie Jaubert-Possamai</name>
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<series>
<title level="j">PLoS ONE</title>
<idno type="eISSN">1932-6203</idno>
<imprint>
<date when="2011">2011</date>
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<div type="abstract" xml:lang="en">
<p>Piwi-interacting RNAs (piRNAs) are known to regulate transposon activity in germ cells of several animal models that propagate sexually. However, the role of piRNAs during asexual reproduction remains almost unknown. Aphids that can alternate sexual and asexual reproduction cycles in response to seasonal changes of photoperiod provide a unique opportunity to study piRNAs and the piRNA pathway in both reproductive modes. Taking advantage of the recently sequenced genome of the pea aphid
<italic>Acyrthosiphon pisum</italic>
, we found an unusually large lineage-specific expansion of genes encoding the Piwi sub-clade of Argonaute proteins.
<italic>In situ</italic>
hybridisation showed differential expressions between the duplicated
<italic>piwi</italic>
copies: while
<italic>Api-piwi2</italic>
and
<italic>Api-piwi6</italic>
are “specialised” in germ cells their most closely related copy, respectively
<italic>Api-piwi5</italic>
and
<italic>Api-piwi3</italic>
, are expressed in the somatic cells. The differential expression was also identified in duplicated
<italic>ago3</italic>
:
<italic>Api-ago3a</italic>
in germ cells and
<italic>Api-ago3b</italic>
in somatic cells. Moreover, analyses of expression profiles of the expanded
<italic>piwi</italic>
and
<italic>ago3</italic>
genes by semi-quantitative RT-PCR showed that expressions varied according to the reproductive types. These specific expression patterns suggest that expanded aphid
<italic>piwi</italic>
and
<italic>ago3</italic>
genes have distinct roles in asexual and sexual reproduction.</p>
</div>
</front>
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<name sortKey="Czech, B" uniqKey="Czech B">B Czech</name>
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<author>
<name sortKey="Hannon, Gj" uniqKey="Hannon G">GJ Hannon</name>
</author>
</analytic>
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<name sortKey="Nowotny, M" uniqKey="Nowotny M">M Nowotny</name>
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<author>
<name sortKey="Yang, W" uniqKey="Yang W">W Yang</name>
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<name sortKey="Parker, Js" uniqKey="Parker J">JS Parker</name>
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<name sortKey="Lu, Hsiao Ling" sort="Lu, Hsiao Ling" uniqKey="Lu H" first="Hsiao-Ling" last="Lu">Hsiao-Ling Lu</name>
</noRegion>
<name sortKey="Chang, Chun Che" sort="Chang, Chun Che" uniqKey="Chang C" first="Chun-Che" last="Chang">Chun-Che Chang</name>
<name sortKey="Chang, Chun Che" sort="Chang, Chun Che" uniqKey="Chang C" first="Chun-Che" last="Chang">Chun-Che Chang</name>
<name sortKey="Chang, Chun Che" sort="Chang, Chun Che" uniqKey="Chang C" first="Chun-Che" last="Chang">Chun-Che Chang</name>
<name sortKey="Lu, Hsiao Ling" sort="Lu, Hsiao Ling" uniqKey="Lu H" first="Hsiao-Ling" last="Lu">Hsiao-Ling Lu</name>
</country>
<country name="France">
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<name sortKey="Tanguy, Sylvie" sort="Tanguy, Sylvie" uniqKey="Tanguy S" first="Sylvie" last="Tanguy">Sylvie Tanguy</name>
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<name sortKey="Gauthier, Jean Pierre" sort="Gauthier, Jean Pierre" uniqKey="Gauthier J" first="Jean-Pierre" last="Gauthier">Jean-Pierre Gauthier</name>
<name sortKey="Jaubert Possamai, Stephanie" sort="Jaubert Possamai, Stephanie" uniqKey="Jaubert Possamai S" first="Stéphanie" last="Jaubert-Possamai">Stéphanie Jaubert-Possamai</name>
<name sortKey="Rispe, Claude" sort="Rispe, Claude" uniqKey="Rispe C" first="Claude" last="Rispe">Claude Rispe</name>
<name sortKey="Tagu, Denis" sort="Tagu, Denis" uniqKey="Tagu D" first="Denis" last="Tagu">Denis Tagu</name>
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<country name="Australie">
<noRegion>
<name sortKey="Walsh, Tom" sort="Walsh, Tom" uniqKey="Walsh T" first="Tom" last="Walsh">Tom Walsh</name>
</noRegion>
<name sortKey="Edwards, Owain" sort="Edwards, Owain" uniqKey="Edwards O" first="Owain" last="Edwards">Owain Edwards</name>
<name sortKey="Gordon, Karl" sort="Gordon, Karl" uniqKey="Gordon K" first="Karl" last="Gordon">Karl Gordon</name>
</country>
</tree>
</affiliations>
</record>

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