Gwanakosides A and B, 6-Deoxy-α-<scp>l</scp>-talopyranose-Bearing Aromatic Metabolites from a <i>Streptomyces</i> sp. and Coculture with <i>Pandoraea</i> sp.
作者:Thanh-Hau Huynh、Jayho Lee、Dong Hyun Moon、Thanh Quang Nguyen、Sangkeun Son、Sunghoon Hwang、Young Eun Du、Jinsheng Cui、Jae-Hyuk Jang、Sang-Jip Nam、Jongheon Shin、Jichan Jang、Sang Kook Lee、Ki-Bong Oh、Dong-Chan Oh
DOI:10.1021/acs.jnatprod.1c00703
日期:2022.1.28
Single-strain cultivation of a mountain soil-derived Streptomyces sp. GA02 and its coculture with Pandoraea sp. GA02N produced two aromatic products, gwanakosides A and B (1 and 2, respectively). Their spectroscopic analysis revealed that 1 is a new dichlorinated naphthalene glycoside and 2 is a pentacyclic aromatic glycoside. The assignment of the two chlorine atoms in 1 was confirmed by the analysis
山土来源的链霉菌的单菌株培养。 GA02 及其与Pandoraea sp. 的共培养。 GA02N 产生了两种芳香族产品,即瓜那苷 A 和 B(分别为1和2 )。他们的光谱分析表明, 1是一种新的二氯化萘糖苷, 2是一种五环芳香糖苷。 1中两个氯原子的归属通过其谱带选择性 CLIP-HSQMBC 光谱分析得到证实。根据1 H– 1 H 耦合常数、旋转框架 Overhauser 增强光谱 (ROESY) NMR 相关性、化学衍生化以及随后的光谱和色谱分析,将瓜那苷中的糖鉴定为 6-脱氧-α- l-吡喃糖。基于基于量子力学的化学位移分析方法、DP4计算和6-脱氧-α- l-吡喃糖的化学确定构型,提出了2的绝对构型,其产量在共培养中提高了约100倍。 Gwanakoside A 对致病菌具有抑制活性,包括金黄色葡萄球菌(MIC = 8 μg/mL) 和结核分枝杆菌(MIC 50 = 15 μg/