Abstract:
:A 7.3-kDa antifungal peptide with an N-terminal sequence exhibiting remarkable homology to defensins from other leguminous plants was isolated from Phaseolus vulgaris cv. 'Spotted Bean'. The isolation procedure involved ion exchange chromatography on O-diethylaminoethyl (DEAE) cellulose, affinity chromatography on Affi-gel blue gel, ion exchange chromatography on SP-Sepharose, and gel filtration by fast protein liquid chromatography on Superdex 75. The peptide was unadsorbed on DEAE-cellulose and adsorbed on Affi-gel blue gel and SP-Sepharose. It exerted an antifungal action on Fusarium oxysporum and Mycosphaerella arachidicola. It inhibited mycelial growth in F. oxysporum with an IC(50) value of 1.8 microM. It suppressed [methyl-(3)H]-thymidine incorporation by leukemia L1210 cells and MBL2 cells with an IC(50) value of 4.0 and 9.0 microM, respectively. There was no effect on HIV-1 reverse transcriptase activity when the peptide was tested up to 0.1 mM.
journal_name
Appl Microbiol Biotechnoljournal_title
Applied microbiology and biotechnologyauthors
Wang HX,Ng TBdoi
10.1007/s00253-006-0650-9subject
Has Abstractpub_date
2007-02-01 00:00:00pages
125-30issue
1eissn
0175-7598issn
1432-0614journal_volume
74pub_type
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