Biotransformation of three aromadendrane‐type sesquiterpenoids by Aspergillus wentii

Abstract

BACKGROUND: The biotransformation of sesquiterpenoids, which are a large class of naturally occurring compounds, using microorganisms as a biocatalyst to produce useful novel organic compounds was investigated. The biotransformation of sesquiterpenoids, (+)-aromadendrene (1), (−)-alloaromadendrene (2) and (+)-ledene (3) has been investigated using Aspergillus wentii as a biocatalyst.

Characteristic Odor Components of Volatile Oil from the Cultivation Medium of Lactobacillus acidophilus

“…Production of odorants including pyrazines and terpenoids by microorganisms has been extensively studied. Our previous studies have investigated metabolites, which give specific aromas through biotransformation of various terpenoids e. g. aromadendrane skeleton and bisabolane skeleton 43,44 . The presence of various pyrazine compounds in MAI would further increase the value of the oil produced Fig.…”

Biotransformation of 19-Nortestosterone by Aspergillus Wentii MRC 200316

“…1 H NMR spectra were recorded in deuteriochloroform with tetramethylsilane as an internal standard reference at 300 MHz with a Varian Mercury 300 spectrometer. 13 24 for Aspergillus wentii MRC 200316 was prepared by mixing sucrose (15 g), glucose (15 g), polypeptone (5 g), MgSO 4 ·7H 2 O (0.5 g), KCl (0.5 g), K 2 HPO 4 (1 g), and FeSO 4 ·7H 2 O (10 mg) in distilled water (1 l). Then the pH was adjusted to 7.2.…”

“…Stock cultures were maintained at 4 °C on PDA slopes. The synthetic medium 24 for Aspergillus wentii MRC 200316 was prepared by mixing sucrose (15 g), glucose (15 g), polypeptone (5 g), MgSO 4 •7H 2 O (0.5 g), KCl (0.5 g), K 2 HPO 4 (1 g), and FeSO 4 •7H 2 O (10 mg) in distilled water (1 l). Then the pH was adjusted to 7.2.…”

Biotransformation of (–)-Verbenone by Some Fungi

“…Chemical shifts are given in ppm (δ scale), coupling constants (J) are given in Hz. 10 for Aspergillus niger NRRL 330 and Aspergillus wentii MRC 200316 was prepared by mixing sucrose (15 g), glucose (15 g), polypeptone (5 g), MgSO 4 ·7H 2 O (0.5 g), KCl (0.5 g), K 2 HPO 4 (1 g), and FeSO 4 ·7H 2 O (10 mg) in distilled water (1 l). Then the pH was adjusted to 7.2.…”