Metabolism of Steviol and Its Derivatives by Gibberella fujikuroi

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概要

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• Steviol (ent-13-hydroxykaur-16-en-19-oic acid)* is metabolized by Gibberella fujikuroi in the presence of inhibitors of gibberellin biosynthesis, such as quaternary ammonium salt-type growth retardants, to afford 7 β-hydroxy- and 6β, 7β-dihydroxysteviol, gibberellins A1, A18, A19, A53 and 7β, 13-dihydroxykaurenolide. Steviol acetate (ent-13-acetoxykaur-16-en-19-oic acid) is also metabolized to the 6β, 7β-dihydroxy-derivative and to the 13-acetyl derivatives of gibberellins A17 and A20 and steviol methyl ester (methyl ent-13-hydroxykaur-16-en-19-oate) into the monohydroxy-, dihydroxy- and hydroxyoxo-derivatives. These results indicate a low substrate specificity of the enzymes in the fungus and provide a useful preparative methodology of several important plant gibberellins carrying the 13-hydroxyl group.

• 社団法人 日本農芸化学会の論文

著者

• TAKAHASHI Nobutaka

  Department of Biochemistry University of Shizuoka School of Pharmaceutical Science

• Takahashi N

  Plant Functions Laboratory Riken

• MUROFUSHI Noboru

  Department of Biotechnology, Akita Prefectural University

• SHIGEMATSU Yoshio

  Department of Agricultural Chemistry, The University of Tokyo

• NAGURA Shigehiro

  Department of Agricultural Chemistry, The University of Tokyo

• Murofushi Noboru

  Department Of Agricultural Chemistry The University Of Tokyo

• Takahashi Nobutaka

  Department Of Agricultural Chemistry Faculty Of Agricultural Science University Of Tokyo

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