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递归基因组工程解读了KT244040中Pseudomonas putida中一个必不可少的thymidylate kinase活动的进化起源

Nicolas T Wirth¹, Katja Rohr¹, Antoine Danchin²

¹The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kongens , Lyngby, Denmark.

|September 21, 2023

概括

这项研究解释了 Pseudomonas putida 如何在基因组中断的情况下保持基本的基酸酶功能. 它强调横向基因转移是细菌获得重要代谢能力的机制.

科学领域:

微生物学微生物学
分子生物学分子生物学
细菌遗传学细菌遗传学

背景情况:

了解细菌代谢对于生物技术和理解生物化学多样性至关重要.
模型细菌*Pseudomonas putida* KT2440呈现了一个独特的案例,其中一种基本的基酸酶功能似乎被基因组岛破坏了.
在P. putida*中这种重要的代谢功能的起源仍然无法解释.

研究的目的:

为了阐明 *Pseudomonas putida* KT2440.0 中必不可少的基酸酶 (dTMPK) 功能的起源和维护.
研究横向基因转移 (HGT) 对获得基本代谢基因的影响.
为细菌基因组进化和工业应用中基因组缩小的潜力提供见解.

主要方法:

对比基因组学分析以确定基因起源和基因组背景.
生物信息工具分析基因合成和潜在的HGT事件.
功能性测试以确认P. putida*中的酶活性和实质性.

主要成果:

在*P. putida* KT2440中,必需的甲基基因酶活性是由一个水平获得的基因维持的.
这种获得的基因占据了被破坏的原生基因的位置,这表明快速的整合和功能替代.
这代表了一种新的实例,一种基本的代谢功能是通过HGT获得的,并在宿主中立即发挥作用.

结论:

横向基因转移是细菌获得和维持基本代谢功能的重要机制,即使当本地基因被破坏时也是如此.
获得的基本基因的即时功能整合可以发生,这挑战了以前对长期适应期的概念.
识别基本和辅助基因有助于为工业生物技术设计强大的,基因组缩小的细菌细胞工厂.

关键词:

伪omonas putida可以使用.细菌进化的细菌进化基因组工程是基因组工程.基因组的缩小是基因组的缩小.横向基因转移是指水平基因转移.预言预言预言预言乙基基因酸乙基因酶 (thymidylate kinase) 是一种

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