INDOLE OXYGENASE FROM THE LEAVES OF JASMINUM-GRANDIFLORUM

被引:15
作者
DIVAKAR, NG
SUBRAMANIAN, V
SUGUMARAN, M
VAIDYANATHAN, CS
机构
[1] Department of Biochemistry, Indian Institute of Science, Bangalore
来源
PLANT SCIENCE LETTERS | 1979年 / 15卷 / 02期
关键词
D O I
10.1016/0304-4211(79)90071-3
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
An indole oxygenase from the leaves of Jasminum grandiflorum was isolated and purified to near homogeneity. The purified enzyme system catalyses the conversion of indole to anthranilic acid. It is optimally active at pH 4.8 and at 30°C. Apart from indole, the oxygenase also attacks 5-hydroxy indole and 5-bromoindole. Both sulfhydryl reagents and sulfhydryl compounds inhibited the enzyme activity. Copper specific metal chelators such as salicylaldoxime, diethyl dithiocarbamate and neocuproine, inhibited the enzyme activity drastically. Inhibition caused by atebrine, could be reversed by FAD. Dialysis resulted in complete loss of enzyme activity. Inactive enzyme could be reactivated only by the addition of both FAD and Cu2+, suggesting that indole oxygenase is a cuproflavoprotein. © 1979.
引用
收藏
页码:177 / 181
页数:5
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