Screening of Filamentous Fungi to Identify Biocatalysts for Lupeol Biotransformation
作者:Tatiane C. de Carvalho、Aline M. Polizeli、Izabel C. C. Turatti、Marcela E. Severiano、Carlos E. de Carvalho、Sérgio R. Ambrósio、Antônio E. M. Crotti、Uir S. de Figueiredo、Paulo C. Vieira、Niege A. J. C. Furtado
DOI:10.3390/molecules15096140
日期:——
The goal of the study was to evaluate the ability of filamentous fungi to biotransform the pentacyclic triterpene lupeol. The microbial transformations were carried out in shake flasks in different media. Experiments were also run with control flasks. Samples of each culture were taken every 24 hours, extracted with ethyl acetate, and analyzed by GC-MS. The biotransformation of lupeol by Aspergillus ochraceus and Mucor rouxii afforded two compounds in each culture, which were detected in the cultures developed for more than seven days only in the Koch’s K1 medium. The obtained data demonstrated that A. ochraceus is a good biocatalyst to introduce double bonds in the lupeol structure, whereas M. rouxii exhibits ability to biocatalyze oxygen insertions in that pentacyclic triterpene. Mass spectrometry was demonstrated to be an efficient analytical method to select promising biocatalysts for the compound investigated in this study. The biotransformation processes were influenced by the culture medium and incubation period. The obtained results open the perspective of using A. ochraceus and M. rouxii in pentacyclic triterpene biotransformations.
该研究的目的是评估丝状真菌生物转化五环三萜羽扇豆醇的能力。微生物转化在不同培养基的摇瓶中进行。还用对照烧瓶进行实验。每 24 小时采集一次每种培养物的样品,用乙酸乙酯提取,并通过 GC-MS 进行分析。赭曲霉和鲁氏毛霉对羽扇豆醇的生物转化在每种培养物中提供了两种化合物,仅在科赫 K1 培养基中培养超过 7 天的培养物中检测到了这些化合物。获得的数据表明,A. ochraceus 是在羽扇豆醇结构中引入双键的良好生物催化剂,而 M. rouxii 表现出生物催化五环三萜中氧插入的能力。质谱法被证明是一种有效的分析方法,可为本研究中研究的化合物选择有前途的生物催化剂。生物转化过程受培养基和培养时间的影响。所获得的结果开启了在五环三萜生物转化中使用 A. ochraceus 和 M. rouxii 的前景。