形成的S-甲基二 Ester 揭示了早期的生物合成步骤的雅塔基米辛
Jin Feng1, Shichao Wang1, Xu Yang1
1Key Laboratory of Glyco-drug Research of Zhejiang Province, School of Chemistry and Material Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences (CAS), Hangzhou, China.
Angewandte Chemie (International ed. in English)
|February 28, 2026
概括
雅塔基生物合成涉及硫转移和S-甲基化,需要先前的O-甲基化步骤. 这项研究阐明了一种新型S-甲基转移酶的机制,促进了对这种复杂抗生素的理解.
科学领域:
- 生物化学 生物化学
- 自然产品生物合成 自然产品生物合成
- 分子生物学分子生物学
背景情况:
- 雅塔基 (YTM) 是一种复杂的抗瘤和抗真菌抗生素.
- YTM含有独特的S-甲基 thioester 分子和一个环胺药.
- 含硫的天然产品丰富,但它们的生物合成途径尚未完全理解.
研究的目的:
- 为了阐明Yatakemycin中S-甲基 thioester部分的生物合成途径.
- 为了确定参与硫转移和S-甲基化中的基因和酶.
- 研究O-甲基化作为S-甲基 thioester形成的先决条件的作用.
主要方法:
- 在YTM生物合成基因集群 (BGC) 内的基因 (ytkG/F/W) 的功能性表征.
- 确定S-甲基硫形成的硫源.
- 酶分析和结构研究 (晶体结构的确定,分子对接,突变) 的YtkW,一个硫酸S-甲基转移酶.
主要成果:
- 证实了ytkG/F/W基因参与硫转移和S-甲基化.
- 形成S-甲基基的过程连接了初级和二级代谢途径.
- 由外部MT类酶催化的O-甲基化在S-甲基 thioester形成之前是必不可少的.
- 阐明了新型S-甲基转移酶YtkW的催化机制.
结论:
- 已经提出了一个可信的早期生物合成途径,以S-甲基 thioester 形成为重点.
- 这些发现增强了对YTM生物合成的理解.
- 该研究为探索YTM和相关化合物的结构多样化提供了新的见解和工具.
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