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DprA招募了ComM,以促进格拉姆阴性细菌在自然转化期间的重组

Triana N Dalia¹, Mérick Machouri^2,3, Céline Lacrouts^2,3

¹Department of Biology, Indiana University, Bloomington, IN 47405.

Proceedings of the National Academy of Sciences of the United States of America

|April 11, 2025

概括

研究人员发现了细菌DNA吸收 (自然转化) 是如何协调的. 蛋白DprA招募酶ComM以促进DNA集成,进步我们对水平基因转移的理解.

科学领域:

微生物学微生物学
分子生物学分子生物学
遗传学是一个遗传学.

背景情况:

自然转换 (NT) 是细菌水平基因转移的关键机制,涉及DNA吸收和基因组集成.
在NT过程中重组的分子机制,特别是像ComM和DprA这样的蛋白质的作用,尚未完全理解.
康姆是一种NT特异的酶,对格拉姆阴性细菌的分支迁移至关重要,但其招募方式尚不清楚.

研究的目的:

阐明在自然转化过程中Comm被招募到重组现场的机制.
为了研究格兰阴性细菌中NT特异性蛋白DprA和ComM之间的相互作用.
了解DprA的C端翼螺旋域在ComM招募中的作用.

主要方法:

使用AlphaFold进行蛋白相互作用的结构预测.
采用了*Helicobacter pylori*和*Vibrio cholerae*作为模型生物.
进行生物化学测试以确认直接的蛋白质与蛋白质相互作用.

主要成果:

在格拉姆阴性DprA同类体中确定了一个C端翼螺旋域.
证明了ComM与DprA翅膀螺旋域直接相互作用.
确定这种DprA-ComM交互对于在NT期间的ComM招聘和随后的分支迁移至关重要.

结论:

在自然转化过程中,DprA通过其翅膀螺旋域积极招募螺旋酶ComM到重组部位.
这种相互作用对于促进分支迁移和高效的DNA集成在格兰阴性细菌中至关重要.
结构建模和实验验证揭示了细菌水平基因转移中的关键分子协调机制.

关键词:

阿尔法折叠的阿尔法横向基因转移是指水平基因转移.再组合的复合方式.

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