Antimicrobial agent isolated from Coptidis rhizome extract incubated with Rhodococcus sp. strain BD7100
作者:Kazuki Ishikawa、Kazunori Takahashi、Syun Hosoi、Hisashi Takeda、Hinaka Yoshida、Daigo Wakana、Masayoshi Tsubuki、Fumihiko Sato、Motoaki Tojo、Tomoo Hosoe
DOI:10.1038/s41429-018-0114-3
日期:2019.2
Coptidis rhizome (CR) is a widely used herbal medicine that contains protoberberine-type alkaloids. CR extract exhibits various pharmacologic activities. A previous study reported the isolation of Rhodococcus sp. strain BD7100 as a berberine (BBR)-utilizing bacterium, and the BBR-degradation pathway has been investigated. When we incubated strain BD7100 cells with CR extract, the number of viable cells declined with the degradation of components in the CR extract, and the culture broth exhibited antibacterial activity against strain BD7100. These results suggest that CR extract cultured in the presence of strain BD7100 contains one or more antibacterial agents. In this study, we isolated coptirhoquinone A (1) from CR extract incubated with strain BD7100 in LuriaâBertani (LB) medium, and the structure was elucidated using NMR and MS analysis. We also report the total synthesis and antimicrobial activities of 1 against bacteria, fungi, and Pythium sp.
黄连(CR)是一种广泛使用的草药,含有原小檗碱型生物碱。 CR 提取物表现出多种药理活性。先前的一项研究报告了红球菌属的分离。菌株 BD7100 作为小檗碱 (BBR) 利用细菌,并且已经研究了 BBR 降解途径。当我们用CR提取物培养BD7100菌株细胞时,随着CR提取物中成分的降解,活细胞数量下降,并且培养液对BD7100菌株表现出抗菌活性。这些结果表明在菌株BD7100存在下培养的CR提取物含有一种或多种抗菌剂。在本研究中,我们从在 LuriaâBertani (LB) 培养基中与菌株 BD7100 一起孵育的 CR 提取物中分离出coptirhoquinone A (1),并使用 NMR 和 MS 分析阐明了其结构。我们还报告了 1 对细菌、真菌和腐霉属的全合成和抗菌活性。