title: Inhibitory effect of flavonoids on DNA-dependent DNA and RNA polymerases.
abstract: Flavonoids, (-)-epigallocatechin (1), myricetin (2) and quercetin (3), were investigated for inhibitory effects on E. coli DNA polymerase I and T7 bacteriophage RNA polymerase. In both DNA and RNA synthesis, 1 and 3 inhibited enzyme reactions by non-competitive and mixed type inhibition respectively, with regard to template DNAs. Myricetin (2) inhibited DNA and RNA polymerase reactions by mixed type and competitive type inhibition, respectively, with template DNAs. It was suggested that 2 interacts with covalently closed circular DNA.
authors: Mitsubishi Kasei Institute of Life Sciences, Tokyo, Japan.
authors: K
authors: K
authors: Shinozuka
authors: Y
authors: Y
authors: Kikuchi
authors: C
authors: C
authors: Nishino
authors: A
authors: A
authors: Mori
authors: S
authors: S
authors: Tawata
mesh_terms: D000818:Animals; D002392:Catechin / Q000031:analogs & derivatives*; D002417:Cattle; D004247:DNA / Q000096:biosynthesis; D004256:DNA Polymerase I / Q000037:antagonists & inhibitors*; D012321:DNA-Directed RNA Polymerases / Q000037:antagonists & inhibitors*; D004926:Escherichia coli / Q000201:enzymology; D005419:Flavonoids / Q000494:pharmacology*; D011794:Quercetin / Q000494:pharmacology*; D012313:RNA / Q000096:biosynthesis; D013604:T-Phages / Q000201:enzymology; D013698:Templates, Genetic
chemical_list: D005419:Flavonoids; D012313:RNA; C040015:myricetin; D002392:Catechin; D004247:DNA; D011794:Quercetin; D012321:DNA-Directed RNA Polymerases; D004256:DNA Polymerase I; C057580:gallocatechol