title: Chitinase-like proteins with antifungal activity from emperor banana fruits.
abstract: 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 (NH(4))(2)SO(4) 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.
authors.affiliation: Department of Biochemistry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
authors.forename: Vincent S M
authors.initials: VS
authors.lastname: Ho
authors.forename: Tzi Bun
authors.initials: TB
authors.lastname: Ng
mesh_terms: D000595:Amino Acid Sequence; D000935:Antifungal Agents / Q000302:isolation & purification* / Q000494:pharmacology; D002688:Chitinases / Q000302:isolation & purification* / Q000494:pharmacology; D002850:Chromatography, Gel; D004591:Electrophoresis, Polyacrylamide Gel; D005670:Fusarium / Q000187:drug effects; D020128:Inhibitory Concentration 50; D028521:Musa / Q000201:enzymology*
chemical_list: D000935:Antifungal Agents; D002688:Chitinases