Structural basis of the antifungal activity of wheat PR4 proteins.

Laura Bertini, Carlo Caporale, Marco Testa, Silvia Proietti, Carla Caruso

Dipartimento di Agrobiologia ed Agrochimica, Universita' della Tuscia, Viterbo, Italy.

FEBS letters 2009 Sep 3

filter terms:

PR4 proteins possess antifungal activity against several pathogenic fungi suggesting a pivotal role in defence reactions against plant pathogen attack. We already showed that wheatwin1, a wheat PR protein of class 4, is endowed with ribonuclease activity. In this study we produced three mutants altering the active site and performed comparative analysis with the native protein also in the presence of the ribonuclease inhibitor 5'-ADP. We characterized the RNA binding site and its interaction with 5'-ADP by 3D modelling and docking studies. Moreover, in vitro antifungal assays have been carried out in order to study the relationship between antifungal and ribonuclease activities. Finally, localization of wheatwin1 in Fusarium culmorum spores was evaluated using fluorescence light microscope.

Citation

Laura Bertini, Carlo Caporale, Marco Testa, Silvia Proietti, Carla Caruso. Structural basis of the antifungal activity of wheat PR4 proteins. FEBS letters. 2009 Sep 3;583(17):2865-71