aureorectus DSM 41692 and Streptomyces virens DSM 41465 as candidate producers of the antibiotic nucleocidin 1. Indeed when these bacterial strains were cultured in a medium supplemented with fluoride (4 mM) they each produced nucleocidin 1 and the previously identified 4′-fluoro-3′-O-β-glucosylated adenosine 2 and its sulfamylated derivative 3. In both of these cases 4′-fluoroadenosine 9 is also identified
基因组同源性和推定的
生物合成
基因簇的存在将
金黄色链霉菌DSM 41692 和Streptomyces virens DSM 41465 确定为抗生素 nucleocidin 1的候选生产者。事实上,当这些细菌菌株在补充有
氟化物 (4 mM) 的
培养基中培养时,它们各自产生核素1和先前确定的 4'-
氟-3'- O -β-
葡糖基化
腺苷2及其
氨磺酰化衍
生物3。在这两种情况下,4'-
氟腺苷9也被鉴定为
天然产物,尽管在牛链霉菌发酵过程中从未观察到它, 核素1的原始来源。4'-
氟腺苷9的身份通过全合成以及使用
葡糖基转移酶 NucGT体外酶促转化为代谢物2来证实。