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Venom toxicity and composition in three Pseudomyrmex ant species having different nesting modes.

Identifieur interne : 003068 ( PubMed/Checkpoint ); précédent : 003067; suivant : 003069

Venom toxicity and composition in three Pseudomyrmex ant species having different nesting modes.

Auteurs : Axel Touchard [France] ; Nicolas Labrière [France] ; Olivier Roux [France] ; Frédéric Petitclerc [France] ; Jérôme Orivel [France] ; Pierre Escoubas [France] ; Jennifer M S. Koh [Australie] ; Graham M. Nicholson [Australie] ; Alain Dejean [France]

Source :

RBID : pubmed:24929139

Descripteurs français

English descriptors

Abstract

We aimed to determine whether the nesting habits of ants have influenced their venom toxicity and composition. We focused on the genus Pseudomyrmex (Pseudomyrmecinae) comprising terrestrial and arboreal species, and, among the latter, plant-ants that are obligate inhabitants of myrmecophytes (i.e., plants sheltering ants in hollow structures). Contrary to our hypothesis, the venom of the ground-dwelling species, Pseudomyrmex termitarius, was as efficacious in paralyzing prey as the venoms of the arboreal and the plant-ant species, Pseudomyrmex penetrator and Pseudomyrmex gracilis. The lethal potency of P. termitarius venom was equipotent with that of P. gracilis whereas the venom of P. penetrator was less potent. The MALDI-TOF MS analysis of each HPLC fraction of the venoms showed that P. termitarius venom is composed of 87 linear peptides, while both P. gracilis and P. penetrator venoms (23 and 26 peptides, respectively) possess peptides with disulfide bonds. Furthermore, P. penetrator venom contains three hetero- and homodimeric peptides consisting of two short peptidic chains linked together by two interchain disulfide bonds. The large number of peptides in P. termitarius venom is likely related to the large diversity of potential prey plus the antibacterial peptides required for nesting in the ground. Whereas predation involves only the prey and predator, P. penetrator venom has evolved in an environment where trees, defoliating insects, browsing mammals and ants live in equilibrium, likely explaining the diversity of the peptide structures.

DOI: 10.1016/j.toxicon.2014.05.022
PubMed: 24929139


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<div type="abstract" xml:lang="en">We aimed to determine whether the nesting habits of ants have influenced their venom toxicity and composition. We focused on the genus Pseudomyrmex (Pseudomyrmecinae) comprising terrestrial and arboreal species, and, among the latter, plant-ants that are obligate inhabitants of myrmecophytes (i.e., plants sheltering ants in hollow structures). Contrary to our hypothesis, the venom of the ground-dwelling species, Pseudomyrmex termitarius, was as efficacious in paralyzing prey as the venoms of the arboreal and the plant-ant species, Pseudomyrmex penetrator and Pseudomyrmex gracilis. The lethal potency of P. termitarius venom was equipotent with that of P. gracilis whereas the venom of P. penetrator was less potent. The MALDI-TOF MS analysis of each HPLC fraction of the venoms showed that P. termitarius venom is composed of 87 linear peptides, while both P. gracilis and P. penetrator venoms (23 and 26 peptides, respectively) possess peptides with disulfide bonds. Furthermore, P. penetrator venom contains three hetero- and homodimeric peptides consisting of two short peptidic chains linked together by two interchain disulfide bonds. The large number of peptides in P. termitarius venom is likely related to the large diversity of potential prey plus the antibacterial peptides required for nesting in the ground. Whereas predation involves only the prey and predator, P. penetrator venom has evolved in an environment where trees, defoliating insects, browsing mammals and ants live in equilibrium, likely explaining the diversity of the peptide structures.</div>
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<AbstractText>We aimed to determine whether the nesting habits of ants have influenced their venom toxicity and composition. We focused on the genus Pseudomyrmex (Pseudomyrmecinae) comprising terrestrial and arboreal species, and, among the latter, plant-ants that are obligate inhabitants of myrmecophytes (i.e., plants sheltering ants in hollow structures). Contrary to our hypothesis, the venom of the ground-dwelling species, Pseudomyrmex termitarius, was as efficacious in paralyzing prey as the venoms of the arboreal and the plant-ant species, Pseudomyrmex penetrator and Pseudomyrmex gracilis. The lethal potency of P. termitarius venom was equipotent with that of P. gracilis whereas the venom of P. penetrator was less potent. The MALDI-TOF MS analysis of each HPLC fraction of the venoms showed that P. termitarius venom is composed of 87 linear peptides, while both P. gracilis and P. penetrator venoms (23 and 26 peptides, respectively) possess peptides with disulfide bonds. Furthermore, P. penetrator venom contains three hetero- and homodimeric peptides consisting of two short peptidic chains linked together by two interchain disulfide bonds. The large number of peptides in P. termitarius venom is likely related to the large diversity of potential prey plus the antibacterial peptides required for nesting in the ground. Whereas predation involves only the prey and predator, P. penetrator venom has evolved in an environment where trees, defoliating insects, browsing mammals and ants live in equilibrium, likely explaining the diversity of the peptide structures.</AbstractText>
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<ForeName>Pierre</ForeName>
<Initials>P</Initials>
<AffiliationInfo>
<Affiliation>VenomeTech, 473 Route des Dolines-Villa 3, Valbonne 06560, France.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Koh</LastName>
<ForeName>Jennifer M S</ForeName>
<Initials>JM</Initials>
<AffiliationInfo>
<Affiliation>Neurotoxin Research Group, School of Medical & Molecular Biosciences, University of Technology, Sydney, Broadway NSW, 2007, Australia.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Nicholson</LastName>
<ForeName>Graham M</ForeName>
<Initials>GM</Initials>
<AffiliationInfo>
<Affiliation>Neurotoxin Research Group, School of Medical & Molecular Biosciences, University of Technology, Sydney, Broadway NSW, 2007, Australia.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Dejean</LastName>
<ForeName>Alain</ForeName>
<Initials>A</Initials>
<AffiliationInfo>
<Affiliation>CNRS, UMR Ecologie des Forêts de Guyane (EcoFoG), Campus Agronomique, BP 316, 97379 Kourou Cedex, France; Laboratoire Écologie Fonctionnelle et Environnement, 118 Route de Narbonne, 31062 Toulouse, France. Electronic address: alain.dejean@wanadoo.fr.</Affiliation>
</AffiliationInfo>
</Author>
</AuthorList>
<Language>eng</Language>
<PublicationTypeList>
<PublicationType UI="D016428">Journal Article</PublicationType>
<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
</PublicationTypeList>
<ArticleDate DateType="Electronic">
<Year>2014</Year>
<Month>06</Month>
<Day>11</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo>
<Country>England</Country>
<MedlineTA>Toxicon</MedlineTA>
<NlmUniqueID>1307333</NlmUniqueID>
<ISSNLinking>0041-0101</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D000862">Ant Venoms</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D000818" MajorTopicYN="N">Animals</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D000862" MajorTopicYN="N">Ant Venoms</DescriptorName>
<QualifierName UI="Q000032" MajorTopicYN="N">analysis</QualifierName>
<QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName>
<QualifierName UI="Q000633" MajorTopicYN="Y">toxicity</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D001000" MajorTopicYN="Y">Ants</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D002851" MajorTopicYN="N">Chromatography, High Pressure Liquid</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D008970" MajorTopicYN="N">Molecular Weight</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D009425" MajorTopicYN="Y">Nesting Behavior</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D019032" MajorTopicYN="N">Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization</DescriptorName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="N">Ant venoms</Keyword>
<Keyword MajorTopicYN="N">Ants</Keyword>
<Keyword MajorTopicYN="N">Arboreal and ground-nesting ants</Keyword>
<Keyword MajorTopicYN="N">Evolution</Keyword>
<Keyword MajorTopicYN="N">Peptides</Keyword>
<Keyword MajorTopicYN="N">Pseudomyrmex</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="received">
<Year>2014</Year>
<Month>01</Month>
<Day>21</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="revised">
<Year>2014</Year>
<Month>05</Month>
<Day>23</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2014</Year>
<Month>05</Month>
<Day>29</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2014</Year>
<Month>6</Month>
<Day>15</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed">
<Year>2014</Year>
<Month>6</Month>
<Day>15</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2015</Year>
<Month>10</Month>
<Day>10</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">24929139</ArticleId>
<ArticleId IdType="pii">S0041-0101(14)00156-1</ArticleId>
<ArticleId IdType="doi">10.1016/j.toxicon.2014.05.022</ArticleId>
</ArticleIdList>
</PubmedData>
</pubmed>
<affiliations>
<list>
<country>
<li>Australie</li>
<li>France</li>
</country>
<region>
<li>Guyane</li>
<li>Languedoc-Roussillon</li>
<li>Midi-Pyrénées</li>
<li>Occitanie (région administrative)</li>
<li>Provence-Alpes-Côte d'Azur</li>
</region>
<settlement>
<li>Kourou</li>
<li>Montpellier</li>
<li>Toulouse</li>
</settlement>
</list>
<tree>
<country name="France">
<region name="Guyane">
<name sortKey="Touchard, Axel" sort="Touchard, Axel" uniqKey="Touchard A" first="Axel" last="Touchard">Axel Touchard</name>
</region>
<name sortKey="Dejean, Alain" sort="Dejean, Alain" uniqKey="Dejean A" first="Alain" last="Dejean">Alain Dejean</name>
<name sortKey="Escoubas, Pierre" sort="Escoubas, Pierre" uniqKey="Escoubas P" first="Pierre" last="Escoubas">Pierre Escoubas</name>
<name sortKey="Labriere, Nicolas" sort="Labriere, Nicolas" uniqKey="Labriere N" first="Nicolas" last="Labrière">Nicolas Labrière</name>
<name sortKey="Orivel, Jerome" sort="Orivel, Jerome" uniqKey="Orivel J" first="Jérôme" last="Orivel">Jérôme Orivel</name>
<name sortKey="Petitclerc, Frederic" sort="Petitclerc, Frederic" uniqKey="Petitclerc F" first="Frédéric" last="Petitclerc">Frédéric Petitclerc</name>
<name sortKey="Roux, Olivier" sort="Roux, Olivier" uniqKey="Roux O" first="Olivier" last="Roux">Olivier Roux</name>
</country>
<country name="Australie">
<noRegion>
<name sortKey="Koh, Jennifer M S" sort="Koh, Jennifer M S" uniqKey="Koh J" first="Jennifer M S" last="Koh">Jennifer M S. Koh</name>
</noRegion>
<name sortKey="Nicholson, Graham M" sort="Nicholson, Graham M" uniqKey="Nicholson G" first="Graham M" last="Nicholson">Graham M. Nicholson</name>
</country>
</tree>
</affiliations>
</record>

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