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Chitinase-Like Proteins with Antifungal Activity from Emperor Banana Fruits

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Two 30-kDa proteins with N-terminal sequence homology to chitinases have been isolated from fruits of the emperor banana by using a protocol that involved (NH4)2SO4 precipitation, affinity chromatography on Affi-gel blue gel, ion exchange chromatography by fast protein liquid chromatography (FPLC) on Mono S and gel filtration by FPLC on Superdex 75. The proteins were adsorbed on Affi-gel blue gel and Mono S. They both inhibited mycelial growth in Fusarium oxysporum but not in Mycosphaerella arachidicola. The chitinase-like protein more strongly bound on Mono S was obtained with a slightly lower yield and exhibited a higher antifungal potency toward F. oxysporum when compared with the less strongly bound chitinase-like protein.

Keywords: Emperor banana; chitinases; isolation

Document Type: Research Article


Publication date: 2007-08-01

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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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