在脂化宏循环的生物合成中采用细菌脂蛋白通路
Jeff Y Chen1,2, Lingyang Zhu3, Kevin Y Zhang1,2
1Department of Chemistry and Howard Hughes Medical Institute, 600 South Mathews Avenue, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
这项研究揭示了一种新的细菌酶类,即多核非海姆铁依赖氧化酶 (MNIOs),可以修改核糖体合成和翻译后修改 (RiPPs). 研究人员发现了新的RiPP-脂蛋白混合体,称为DAG-RiPPs,扩大了我们对细菌生物合成的理解.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 酶学 是一种酶学.
背景情况:
- 细菌多核非铁依赖氧化酶 (MNIOs) 对于修改核糖体合成和翻译后修改 (RiPPs) 至关重要.
- 来自Chryseobacterium的酶ChrH是MNIO的典范,催化复杂的转化,包括宏环化,异环化和S-甲基化.
研究的目的:
- 描述MNIO酶子家族的更广泛的基质范围和产品.
- 研究基质识别机制和MNIO产品的结构多样化.
- 为了识别和表征新的RiPP-脂蛋白混合体.
主要方法:
- 使用比较基因组学来识别和分析MNIO酶子家族及其产物.
- 使用生物信息分析来确定基质识别动机和N-终端修饰.
- 进行了基因组挖掘,以发现预测的RiPP-脂蛋白杂交体.
主要成果:
- MNIO子家族通过保留的C端模式识别基质,使N端多样化成为可能.
- 基质可以通过细菌脂蛋白通路拥有N端信号以成熟.
- 确定了新的RiPP-脂蛋白杂交物,称为DAG-RiPPs,其特征是N-终端的二甲基糖醇修饰.
结论:
- MNIO酶子家族产生多种RiPP,包括宏环原体和更大的改性蛋白质.
- 一个保存的C-终端图案决定了基质识别,允许广泛的N-终端结构变化.
- DAG-RiPPs的发现突出了新一类混合分子,并扩大了已知的RiPP修改作品集.
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