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Indole oxygenase from the leaves of Jasminum grandiflorum

Divakar, NG and Subramanian, V and Sugumaran, M and Vaidyanathan, CS (1979) Indole oxygenase from the leaves of Jasminum grandiflorum. In: Plant Science Letters, 15 (2). pp. 177-181.

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Official URL: http://dx.doi.org/10.1016/0304-4211(79)90071-3


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.

Item Type: Journal Article
Publication: Plant Science Letters
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Biological Sciences > Biochemistry
Date Deposited: 23 Dec 2010 05:38
Last Modified: 23 Dec 2010 05:38
URI: http://eprints.iisc.ac.in/id/eprint/34385

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