Structural basis of the antifungal activity of wheat PR4 proteins.
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.
Bertini
Laura
L
Dipartimento di Agrobiologia ed Agrochimica, Universita' della Tuscia, Viterbo, Italy.
Caporale
Carlo
C
Testa
Marco
M
Proietti
Silvia
S
Caruso
Carla
C
D000244:Adenosine Diphosphate / Q000737:chemistry / Q000378:metabolism; D000935:Antifungal Agents / Q000737:chemistry / Q000494:pharmacology; D020134:Catalytic Domain; D005670:Fusarium / Q000187:drug effects* / Q000472:pathogenicity; D008958:Models, Molecular; D008969:Molecular Sequence Data; D009154:Mutation; D010935:Plant Diseases / Q000382:microbiology; D010940:Plant Proteins / Q000737:chemistry* / Q000235:genetics / Q000494:pharmacology*; D017434:Protein Structure, Tertiary; D012260:Ribonucleases / Q000235:genetics / Q000378:metabolism; D013172:Spores, Fungal / Q000737:chemistry; D014908:Triticum / Q000737:chemistry* / Q000235:genetics / Q000382:microbiology
D000935:Antifungal Agents; D010940:Plant Proteins; C062880:Win-1 proteins, plant; D000244:Adenosine Diphosphate; D012260:Ribonucleases