基因组挖掘揭示了一种高度氧化的细菌超二二二二二氧化物酸
Ziyi Yang1, Xingming Pan1, Lianchun Deng1
1State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, Jiangsu, China. ldong@cpu.edu.cn.
Organic & biomolecular chemistry
|August 15, 2025
概括
研究人员发现了smelanic酸,一种具有独特氧化结构的新型细菌meroterpenoid,使用Streptomyces的酶引导基因组挖掘. 这种方法有效地发现了新的自然产品,并扩大了化学多样性.
科学领域:
- 自然产品化学 自然产品化学
- 微生物生物化学 微生物生物化学
- 合成生物学 合成生物学
背景情况:
- 细菌的甲甲甲是罕见的,其特点是复杂的融合三环结构.
- 烯循环酶是烯生物合成中的关键酶,但非正规变体提供了独特的结构可能性.
研究的目的:
- 通过酶引导的基因组挖掘,发现新的细菌美罗特类.
- 为了阐明一个新发现的化合物的结构和生物合成途径.
主要方法:
- 基于已知的烯循环酶 (AtoE) 的Streptomyces melanosporofaciens的定向基因组挖掘.
- 在Streptomyces albus中,一个神秘的生物合成基因集群的异质表达.
- 使用NMR光谱学和X射线晶体学阐明产生的化合物的结构.
主要成果:
- 标识和特征的smelanic酸 (1),一个新型的perhydrophenanthrene meroterpenoid.
- 斯梅兰酸具有具有高氧化侧链的环氧化和甘油酸部分,这是细菌meroterpenoids中独特的特征.
- 该研究确定了Smed,AtoE同类物,作为可能参与smelanic酸生物合成的循环酶.
结论:
- 酶引导的基因组挖掘是发现结构新的自然产品的有效策略.
- 发现了smelanic酸扩大了已知的细菌meroterpenoids的化学多样性.
- 这项工作突出了探索新生物活性化合物的神秘生物合成基因集群的潜力.
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