Abstract
Fagaronine, a benzophenanthridine alkaloid from roots of Fagara zanthoxyloides (Rutaceae), has been reported to possess anti-leukemic activity. It inhibited RNA-directed DNA polymerase activity from avian myeloblastosis virus, Rauscher leukemia virus and simian sarcoma virus. With poly rA·oligo dT, the alkaloid concentration for 50% inhibition of the enzyme activity from these viruses was in the range of 6–12 μg (15 – 31 nmoles) per ml of reaction mixture. The enzyme reaction was also inhibited with activated DNA and 70S RNA as templates; however, with poly rC·oligo dG no inhibition of enzyme activity was obtained. These results suggest that fagaronine inhibits enzyme activity by interaction with the A:T templateprimer.
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