通过进化保守的核糖体蛋白L11甲基化调节细菌严格反应
Hanna E Walukiewicz1, Yuliya Farris2, Meagan C Burnet2
1Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.
mBio
|August 27, 2024
概括
细菌蛋白的甲基化,特别是核糖体蛋白L11的甲基化,对于严格的响应信号和调节核糖体活动至关重要. 这种保守的修饰影响了细菌的平衡,特别是在静止阶段.
科学领域:
- 细菌学 细菌学是一门学科.
- 分子生物学分子生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 氨酸和氨酸甲基化调节了真核生物中的酶和转录,但它在细菌中的作用仍然基本不明.
- 尽管已经确定了60多年,但细菌蛋白质甲基化的功能仅在少数蛋白质中被理解.
- 细菌蛋白质组的很大一部分经历甲基化,蛋白质的保留点参与了必要的细胞过程.
研究的目的:
- 为了研究细菌中蛋白质甲基化的功能意义.
- 探索细菌核糖体蛋白质上保存甲基化位点的作用.
- 为了阐明核糖体蛋白L11 (bL11) 的特定功能.甲基化.
主要方法:
- 重新分析48个细菌菌株的大型细胞蛋白组学数据集.
- 在大肠杆菌中对prmA删除突变体 (ΔprmA) 的比较蛋白质组学分析.
- 测定无机聚酸盐和瓜诺辛四/五酸盐水平,RNA,核糖体蛋白质和多元体形状.
主要成果:
- 几乎四分之一的细菌蛋白质组是甲基化,在各种血统中保留了遗址.
- 核糖体蛋白L11 (bL11) 的甲基化得到保存,但由于 ΔprmA 突变体中缺乏生长缺陷,其功能以前尚不清楚.
- 该ΔprmA突变体表现出危害的瓜诺辛四/五酸盐生产,减少无机聚酸盐,RNA/核糖体蛋白积累,以及静止阶段异常的多体组形状.
结论:
- 保存的bL11甲基化对于细菌有效的严格响应信号是必不可少的.
- bL11甲基化在调节核糖体活动,循环和整体核糖体平衡方面发挥着至关重要的作用.
- 这项研究强调了蛋白质甲基化在细菌生理学的重要性,超出了已知的真核生物功能.
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