   2.5.1.70 | more |
construction of chimeric enzymes between narigenin 8-dimethylallyltransferase and isoflavone-specific prenyltransferase G6DT responsible for the prenylation of the genistein at the 6-position, by recombination of amino acid sequences within the loop domains. Chimera SfG2N possesses purely narigenin 8-dimethylallyltransferase activity despite the absence of the N-terminal sequence derived from narigenin 8-dimethylallyltransferase, 243 amino acids. Chimera SfG3N possesses only isoflavone-specific prenyltransferase G6DT activity, although its 33% of the C-terminus is from narigenin 8-dimethylallyltransferase polypeptide. Neither chimeric enzyme can catalyze the prenylation reaction for other types of flavonoid such as kaempferol, apigenin, naringenin chalcone |
722715 |
