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The sterol-binding activity of PATHOGENESIS-RELATED PROTEIN 1 reveals the mode of action of an antimicrobial protein.

Identifieur interne : 000899 ( Main/Exploration ); précédent : 000898; suivant : 000900

The sterol-binding activity of PATHOGENESIS-RELATED PROTEIN 1 reveals the mode of action of an antimicrobial protein.

Auteurs : Jordi Gamir [Suisse] ; Rabih Darwiche [Suisse] ; Pieter Van'T Hof [Suisse] ; Vineet Choudhary [Suisse] ; Michael Stumpe [Suisse] ; Roger Schneiter [Suisse] ; Felix Mauch [Suisse]

Source :

RBID : pubmed:27747953

Descripteurs français

English descriptors

Abstract

Pathogenesis-related proteins played a pioneering role 50 years ago in the discovery of plant innate immunity as a set of proteins that accumulated upon pathogen challenge. The most abundant of these proteins, PATHOGENESIS-RELATED 1 (PR-1) encodes a small antimicrobial protein that has become, as a marker of plant immune signaling, one of the most referred to plant proteins. The biochemical activity and mode of action of PR-1 proteins has remained elusive, however. Here, we provide genetic and biochemical evidence for the capacity of PR-1 proteins to bind sterols, and demonstrate that the inhibitory effect on pathogen growth is caused by the sequestration of sterol from pathogens. In support of our findings, sterol-auxotroph pathogens such as the oomycete Phytophthora are particularly sensitive to PR-1, whereas sterol-prototroph fungal pathogens become highly sensitive only when sterol biosynthesis is compromised. Our results are in line with previous findings showing that plants with enhanced PR-1 expression are particularly well protected against oomycete pathogens.

DOI: 10.1111/tpj.13398
PubMed: 27747953


Affiliations:


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<div type="abstract" xml:lang="en">Pathogenesis-related proteins played a pioneering role 50 years ago in the discovery of plant innate immunity as a set of proteins that accumulated upon pathogen challenge. The most abundant of these proteins, PATHOGENESIS-RELATED 1 (PR-1) encodes a small antimicrobial protein that has become, as a marker of plant immune signaling, one of the most referred to plant proteins. The biochemical activity and mode of action of PR-1 proteins has remained elusive, however. Here, we provide genetic and biochemical evidence for the capacity of PR-1 proteins to bind sterols, and demonstrate that the inhibitory effect on pathogen growth is caused by the sequestration of sterol from pathogens. In support of our findings, sterol-auxotroph pathogens such as the oomycete Phytophthora are particularly sensitive to PR-1, whereas sterol-prototroph fungal pathogens become highly sensitive only when sterol biosynthesis is compromised. Our results are in line with previous findings showing that plants with enhanced PR-1 expression are particularly well protected against oomycete pathogens.</div>
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<DescriptorName UI="D018551" MajorTopicYN="N">Lycopersicon esculentum</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010838" MajorTopicYN="N">Phytophthora</DescriptorName>
<QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010935" MajorTopicYN="N">Plant Diseases</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010940" MajorTopicYN="N">Plant Proteins</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010944" MajorTopicYN="N">Plants</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D011485" MajorTopicYN="N">Protein Binding</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D013261" MajorTopicYN="N">Sterols</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D014026" MajorTopicYN="N">Tobacco</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="Y">CAP protein</Keyword>
<Keyword MajorTopicYN="Y">PR-1</Keyword>
<Keyword MajorTopicYN="Y">Phytophthora</Keyword>
<Keyword MajorTopicYN="Y">antimicrobial protein</Keyword>
<Keyword MajorTopicYN="Y">plant immunity</Keyword>
<Keyword MajorTopicYN="Y">sterol binding</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="received">
<Year>2016</Year>
<Month>08</Month>
<Day>18</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="revised">
<Year>2016</Year>
<Month>10</Month>
<Day>11</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2016</Year>
<Month>10</Month>
<Day>12</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed">
<Year>2016</Year>
<Month>10</Month>
<Day>18</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2017</Year>
<Month>11</Month>
<Day>29</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2016</Year>
<Month>10</Month>
<Day>18</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">27747953</ArticleId>
<ArticleId IdType="doi">10.1111/tpj.13398</ArticleId>
</ArticleIdList>
</PubmedData>
</pubmed>
<affiliations>
<list>
<country>
<li>Suisse</li>
</country>
<region>
<li>Canton de Fribourg</li>
</region>
<settlement>
<li>Fribourg</li>
</settlement>
<orgName>
<li>Université de Fribourg</li>
</orgName>
</list>
<tree>
<country name="Suisse">
<region name="Canton de Fribourg">
<name sortKey="Gamir, Jordi" sort="Gamir, Jordi" uniqKey="Gamir J" first="Jordi" last="Gamir">Jordi Gamir</name>
</region>
<name sortKey="Choudhary, Vineet" sort="Choudhary, Vineet" uniqKey="Choudhary V" first="Vineet" last="Choudhary">Vineet Choudhary</name>
<name sortKey="Darwiche, Rabih" sort="Darwiche, Rabih" uniqKey="Darwiche R" first="Rabih" last="Darwiche">Rabih Darwiche</name>
<name sortKey="Mauch, Felix" sort="Mauch, Felix" uniqKey="Mauch F" first="Felix" last="Mauch">Felix Mauch</name>
<name sortKey="Schneiter, Roger" sort="Schneiter, Roger" uniqKey="Schneiter R" first="Roger" last="Schneiter">Roger Schneiter</name>
<name sortKey="Stumpe, Michael" sort="Stumpe, Michael" uniqKey="Stumpe M" first="Michael" last="Stumpe">Michael Stumpe</name>
<name sortKey="Van T Hof, Pieter" sort="Van T Hof, Pieter" uniqKey="Van T Hof P" first="Pieter" last="Van'T Hof">Pieter Van'T Hof</name>
</country>
</tree>
</affiliations>
</record>

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