High-affinity copper transport and Snq2 export permease of Saccharomyces cerevisiae modulate cytotoxicity of PR-10 from Theobroma cacao

Pungartnik Cristina, Da Silva Aline Clara, Alves de Melo Sarah, Peres Gramacho Karina, De Mattos Cascardo Julio Cézar, Brendel Martin, Micheli Fabienne, Da Silva Gesteira Abelmon. 2009. High-affinity copper transport and Snq2 export permease of Saccharomyces cerevisiae modulate cytotoxicity of PR-10 from Theobroma cacao. Molecular Plant-Microbe Interactions, 22 (1) : pp. 39-51.

Journal article ; Article de revue à facteur d'impact
[img] Published version - Anglais
Access restricted to CIRAD agents
Use under authorization by the author or CIRAD.

Télécharger (673kB)


Abstract : A pathogenesis-related (PR) protein from Theobroma cacao (TcPR-10) was identified from a cacao-Moniliophthora perniciosa interaction cDNA library. Nucleotide and amino acid sequences showed homology with other PR-10 proteins having P loop motif and Betv1 domain. Recombinant TcPR-10 showed in vitro and in vivo ribonuclease activity, and antifungal activity against the basidiomycete cacao pathogen M. perniciosa and the yeast Saccharomyces cerevisiae. Fluorescein isothiocyanate-labeled TcPR-10 was internalized by M. perniciosa hyphae and S. cerevisiae cells and inhibited growth of both fungi. Energy and temperature-dependent internalization of the TcPR-10 suggested an active importation into the fungal cells. Chronical exposure to TcPR-10 of 29 yeast mutants with single gene defects in DNA repair, general membrane transport, metal transport, and antioxidant defenses was tested. Two yeast mutants were hyperresistant compared with their respective isogenic wild type: ctr3[delta] mutant, lacking the high-affinity plasma membrane copper transporter and mac1[delta], the copper-sensing transcription factor involved in regulation of high-affinity copper transport. Acute exposure of exponentially growing yeast cells revealed that TcPR-10 resistance is also enhanced in the Snq2 export permease-lacking mutant which has reduced intracellular presence of TcPR-10. (Résumé d'auteur)

Mots-clés Agrovoc : Theobroma cacao, Saccharomyces cerevisiae, Moniliophthora, Protéine recombinante, Clonage moléculaire, Expression des gènes, Résistance aux organismes nuisibles, Génie génétique, Cuivre, Toxicité, Gène

Mots-clés complémentaires : Moniliophthora perniciosa

Classification Agris : F30 - Plant genetics and breeding
H20 - Plant diseases
Q03 - Food contamination and toxicology

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Pungartnik Cristina, UESC (BRA)
  • Da Silva Aline Clara, UESC (BRA)
  • Alves de Melo Sarah, UESC (BRA)
  • Peres Gramacho Karina, CEPLAC (BRA)
  • De Mattos Cascardo Julio Cézar, UESC (BRA)
  • Brendel Martin, UESC (BRA)
  • Micheli Fabienne, CIRAD-BIOS-UMR DAP (BRA)
  • Da Silva Gesteira Abelmon, UESC (BRA)

Autres liens de la publication

Source : Cirad - Agritrop (

View Item (staff only) View Item (staff only)

[ Page générée et mise en cache le 2020-10-24 ]