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Pomegranin, An Antifungal Peptide from Pomegranate Peels

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A new antifungal peptide designated as pomegranin, with an N-terminal sequence resembling that of rice disease resistance NB-S-LRR-like protein, was isolated from fresh pomegranate peels by ion exchange chromatography on DEAE-cellulose, affinity chromatography on Affi-gel blue gel, and gel filtration by fast protein liquid chromatography on Superdex 75. Pomegranin was unadsorbed on DEAE-cellulose but adsorbed on Affi-gel blue gel. It exhibited a molecular mass of 11 kDa in both gel filtration and sodium dodecyl sulfate-polyacrylamide gel electrophoresis. It inhibited mycelial growth in the fungi Botrytis cinerea and Fusarium oxysporum with an IC50 of 2 μM and 6.1 μM, respectively. It was devoid of hemagglutinating, ribonuclease, deoxyribonuclease and protease inhibitory activities.

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Keywords: antifungal peptide; isolation; peel; pomegranate

Document Type: Research Article

Publication date: 2009-01-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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