The plant pathogenesis-related PR-10 proteins

[en] The PR-10 protein family contains proteins related to pathogenesis and allergenic proteins. They are acidic proteins, with an intracellular localization, usually members of a multigene family and ubiquitous among plant kingdom. They contain a highly conserved motif, identified as a phosphate binding site. Even if the biological function of these proteins is still unknown, many indicators seem to favour the hypothesis of an RNAse activity. Moreover, one of them seems to be a cytokinin specific binding protein. Besides, PR-10 protein expression induction under cytokinin treatment was observed with the Catharanthus roseus CrPR-10a protein. Here, we present the evidence of a significative increase of endogenous cytokinin contents in leaves of transgenic Tobacco plants over-expressing the CrPR-10a protein.
[fr] Les protéines PR-10 regroupent à la fois des protéines de pathogenèse et des protéines allergènes. Ce sont des protéines acides, à localisation intracellulaire, généralement membres d’une famille multigénique et ubiquitaires à travers le règne végétal. Elles contiennent un motif hautement conservé, identifié comme un site de fixation de groupements phosphates. Même si la fonction biologique de ces protéines est encore mal définie, plusieurs indications semblent être favorables à l’hypothèse d’une activité RNAse. De plus, l’une d’entre elles serait dotée de la faculté de former des complexes spécifiques avec des cytokinines. En outre, une induction de l’expression des protéines PR-10 sous l’action de traitement par des cytokinines a été observée dans le cas de la protéine CrPR-10a chez Catharanthus roseus. La sur-expression de cette protéine PR-10 chez le Tabac, nous a permis de mettre en évidence une augmentation statistiquement significative des teneurs endogènes de certaines cytokinines.

Disciplines :

Phytobiology (plant sciences, forestry, mycology...)
Biochemistry, biophysics & molecular biology

Author, co-author :

Elbez, Mounira; Université de tours > Faculté de pharmacie > Biol Mol & Biotechnol Vegetales

Kevers, Claire ; Université de Liège - ULiège > Département des sciences de la vie > Biologie moléculaire et biotechnologie végétales

Hamdi, Saïd; Université de Bordeaux > Unite BCMDP

Rideau, Marc; Université de Tours > Faculté de pharmacie > Biol Mol & Biotechnol Vegetales

Petit-Paly, Geneviève; Université de Tours > Faculté de Pharmacie > Biol Mol & Biotechnol Vegetales

Language :

French

Title :

The plant pathogenesis-related PR-10 proteins

Alternative titles :

[fr] Les protéines de pathogenèse PR-10 des végétaux

Publication date :

2002

Journal title :

Acta Botanica Gallica

ISSN :

1253-8078

eISSN :

2166-3408

Publisher :

Soc Botanique France, Lille-Cedex, France

Volume :

149

Issue :

Pages :

415-444

Peer reviewed :

Peer reviewed

Available on ORBi :

since 09 February 2009

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