Serveur d'exploration Phytophthora

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High affinity binding of a fungal oligopeptide elicitor to parsley plasma membranes triggers multiple defense responses.

Identifieur interne : 002C21 ( Main/Exploration ); précédent : 002C20; suivant : 002C22

High affinity binding of a fungal oligopeptide elicitor to parsley plasma membranes triggers multiple defense responses.

Auteurs : T. Nürnberger [Allemagne] ; D. Nennstiel ; T. Jabs ; W R Sacks ; K. Hahlbrock ; D. Scheel

Source :

RBID : pubmed:8062387

Descripteurs français

English descriptors

Abstract

An oligopeptide of 13 amino acids (Pep-13) identified within a 42 kDa glycoprotein elicitor from P. mega-sperma was shown to be necessary and sufficient to stimulate a complex defense response in parsley cells comprising H+/Ca2+ influxes, K+/Cl- effluxes, an oxidative burst, defense-related gene activation, and phytoalexin formation. Binding of radiolabeled Pep-13 to parsley microsomes and protoplasts was specific, reversible, and saturable. Identical structural features of Pep-13 were found to be responsible for specific binding and initiation of all plant responses analyzed. The high affinity binding site recognizing the peptide ligand (KD = 2.4 nM) may therefore represent a novel class of receptors in plants, and the rapidly induced ion fluxes may constitute elements of the signal transduction cascade triggering pathogen defense in plants.

DOI: 10.1016/0092-8674(94)90423-5
PubMed: 8062387


Affiliations:


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


Le document en format XML

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<term>Amino Acid Sequence (MeSH)</term>
<term>Binding Sites (MeSH)</term>
<term>Cell Membrane (metabolism)</term>
<term>Cells, Cultured (MeSH)</term>
<term>Glycoproteins (metabolism)</term>
<term>Ions (MeSH)</term>
<term>Microsomes (metabolism)</term>
<term>Models, Biological (MeSH)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Oligopeptides (pharmacology)</term>
<term>Phytophthora (chemistry)</term>
<term>Plant Extracts (biosynthesis)</term>
<term>Protein Binding (MeSH)</term>
<term>Protoplasts (metabolism)</term>
<term>Respiratory Burst (MeSH)</term>
<term>Sesquiterpenes (MeSH)</term>
<term>Signal Transduction (MeSH)</term>
<term>Structure-Activity Relationship (MeSH)</term>
<term>Terpenes (MeSH)</term>
<term>Transcription, Genetic (MeSH)</term>
<term>Vegetables (microbiology)</term>
<term>Vegetables (physiology)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr">
<term>Cellules cultivées (MeSH)</term>
<term>Données de séquences moléculaires (MeSH)</term>
<term>Extraits de plantes (biosynthèse)</term>
<term>Glycoprotéines (métabolisme)</term>
<term>Ions (MeSH)</term>
<term>Liaison aux protéines (MeSH)</term>
<term>Légumes (microbiologie)</term>
<term>Légumes (physiologie)</term>
<term>Membrane cellulaire (métabolisme)</term>
<term>Microsomes (métabolisme)</term>
<term>Modèles biologiques (MeSH)</term>
<term>Oligopeptides (pharmacologie)</term>
<term>Phytophthora (composition chimique)</term>
<term>Protoplastes (métabolisme)</term>
<term>Relation structure-activité (MeSH)</term>
<term>Sesquiterpènes (MeSH)</term>
<term>Sites de fixation (MeSH)</term>
<term>Stimulation du métabolisme oxydatif (MeSH)</term>
<term>Séquence d'acides aminés (MeSH)</term>
<term>Terpènes (MeSH)</term>
<term>Transcription génétique (MeSH)</term>
<term>Transduction du signal (MeSH)</term>
</keywords>
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<term>Plant Extracts</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en">
<term>Glycoproteins</term>
</keywords>
<keywords scheme="MESH" qualifier="biosynthèse" xml:lang="fr">
<term>Extraits de plantes</term>
</keywords>
<keywords scheme="MESH" qualifier="chemistry" xml:lang="en">
<term>Phytophthora</term>
</keywords>
<keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr">
<term>Phytophthora</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en">
<term>Cell Membrane</term>
<term>Microsomes</term>
<term>Protoplasts</term>
</keywords>
<keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr">
<term>Légumes</term>
</keywords>
<keywords scheme="MESH" qualifier="microbiology" xml:lang="en">
<term>Vegetables</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr">
<term>Glycoprotéines</term>
<term>Membrane cellulaire</term>
<term>Microsomes</term>
<term>Protoplastes</term>
</keywords>
<keywords scheme="MESH" qualifier="pharmacologie" xml:lang="fr">
<term>Oligopeptides</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en">
<term>Oligopeptides</term>
</keywords>
<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr">
<term>Légumes</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en">
<term>Vegetables</term>
</keywords>
<keywords scheme="MESH" xml:lang="en">
<term>Amino Acid Sequence</term>
<term>Binding Sites</term>
<term>Cells, Cultured</term>
<term>Ions</term>
<term>Models, Biological</term>
<term>Molecular Sequence Data</term>
<term>Protein Binding</term>
<term>Respiratory Burst</term>
<term>Sesquiterpenes</term>
<term>Signal Transduction</term>
<term>Structure-Activity Relationship</term>
<term>Terpenes</term>
<term>Transcription, Genetic</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Cellules cultivées</term>
<term>Données de séquences moléculaires</term>
<term>Ions</term>
<term>Liaison aux protéines</term>
<term>Modèles biologiques</term>
<term>Relation structure-activité</term>
<term>Sesquiterpènes</term>
<term>Sites de fixation</term>
<term>Stimulation du métabolisme oxydatif</term>
<term>Séquence d'acides aminés</term>
<term>Terpènes</term>
<term>Transcription génétique</term>
<term>Transduction du signal</term>
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<front>
<div type="abstract" xml:lang="en">An oligopeptide of 13 amino acids (Pep-13) identified within a 42 kDa glycoprotein elicitor from P. mega-sperma was shown to be necessary and sufficient to stimulate a complex defense response in parsley cells comprising H+/Ca2+ influxes, K+/Cl- effluxes, an oxidative burst, defense-related gene activation, and phytoalexin formation. Binding of radiolabeled Pep-13 to parsley microsomes and protoplasts was specific, reversible, and saturable. Identical structural features of Pep-13 were found to be responsible for specific binding and initiation of all plant responses analyzed. The high affinity binding site recognizing the peptide ligand (KD = 2.4 nM) may therefore represent a novel class of receptors in plants, and the rapidly induced ion fluxes may constitute elements of the signal transduction cascade triggering pathogen defense in plants.</div>
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<AbstractText>An oligopeptide of 13 amino acids (Pep-13) identified within a 42 kDa glycoprotein elicitor from P. mega-sperma was shown to be necessary and sufficient to stimulate a complex defense response in parsley cells comprising H+/Ca2+ influxes, K+/Cl- effluxes, an oxidative burst, defense-related gene activation, and phytoalexin formation. Binding of radiolabeled Pep-13 to parsley microsomes and protoplasts was specific, reversible, and saturable. Identical structural features of Pep-13 were found to be responsible for specific binding and initiation of all plant responses analyzed. The high affinity binding site recognizing the peptide ligand (KD = 2.4 nM) may therefore represent a novel class of receptors in plants, and the rapidly induced ion fluxes may constitute elements of the signal transduction cascade triggering pathogen defense in plants.</AbstractText>
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