在一个成熟的拉索的单一残留物上进行代糖化
Ke Sun1, Jiao-Jiao Cui1, WeiKang Zhai1
1State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, School of Pharmacy, Lanzhou University Lanzhou 730000 People's Republic of China dongsh@lzu.edu.cn.
Chemical science
|March 19, 2025
概括
这项研究揭示了一种独特的糖转移酶 (GT),它可以代地糖化拉索,这是一个由核糖体合成和翻译后修饰 (RiPPs) 的类别. 这一发现扩大了我们对RiPP生物合成的理解,并为的多样化提供了新的工具.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 合成生物学 合成生物学
背景情况:
- 核糖体合成和翻译后改性 (RiPPs) 呈现出多样化的结构和功能.
- 拉索是一种RiPPs的子类,具有复杂的拉里亚结结构.
- 在RiPPs中的翻译后修改 (PTM) 对它们的结构和生物多样性至关重要,但对成熟的拉索的修改具有挑战性.
研究的目的:
- 为了研究参与达瓦辛生物合成的独特酶机制,一种类型的拉索.
- 识别和描述能够修改成熟的拉索的新型葡萄糖转移酶 (GTs).
- 探索这些酶在组合生物合成和多样化的潜力.
主要方法:
- 糖转移酶IgtG的生物化学表征.
- 在RiPP生物合成中对IgtG类酶的生物信息分析.
- 在成熟的拉索上进行了体外糖化分析.
主要成果:
- 鉴定了一种新型的糖转移酶,IgtG,它在成熟的拉索上代性地对氨酸残留物进行高达四次的糖化.
- 这种代糖化发生在达瓦辛生物合成的最后一步,与线性的修改不同.
- 生物信息分析确定了24种IgtG类GT,可能参与草类生物合成,与已知的RiPPGT不同.
结论:
- IgtG的发现证明了一个独特的PTM策略,在成熟的拉索上起作用.
- 这一发现突显了RiPPs内部不同的生物合成途径.
- IgtG和相关酶是通过组合生物合成来使拉索的酶多样化有价值的工具.
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