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一个单域响应调节器通过与启动的糖酶转移酶相互作用来激活外聚糖类生物合成

Johannes Schwabe¹, Julia Monjaras-Feria², Timo Glatter³

¹Department of Ecophysiology, Max Planck Institute for Terrestrial Microbiology, Marburg, Germany.

|November 28, 2025

概括

细菌通过EpsW~P调节多糖体的产生,通过EpsW~P调节多糖体的产生,通过EpsW~P调节多糖体的产生,通过EpsW~P调节多糖体的产生,通过EpsW~P调节多糖体的产生,通过EpsW~P调节多糖体的产生,通过EpsW~P调节多糖体的产生,通过EpsW~P调节多糖体的产生,通过EpsW~P调节多糖体的产生. 这种相互作用促进了EpsZ二元化,启动了外聚糖 (EPS) 生物合成.

科学领域:

细菌细胞表面和糖生物学
酶调节的分子机制
微生物生理学和生物合成途径

背景情况:

出口的细菌多糖对于细胞功能和生物技术应用至关重要.
多糖生物合成依赖于有限的共享基质,需要精确的监管控制.
在*Myxococcus xanthus*中,外聚糖 (EPS) 合成是由EpsZ,一个大型单基糖酶转移酶 (monoPGT) 启动的.

研究的目的:

阐明Dif化学传感系统调节*Myxococcus xanthus*中EPS生物合成的机制.
调查化单域响应调节器EpsW (EpsW~P) 在EPS通路激活中的作用.
为了确定EpsW~P和启动酶EpsZ之间的相互作用.

主要方法:

基于MiniTurbo的近距离标记,以检测蛋白质与蛋白质相互作用.
在*Salmonella enterica*中对EpsZ和EpsW进行异质表达,以评估功能补充.
基于AlphaFold的结构建模用于预测蛋白质复杂结构和二分化接口.

主要成果:

EpsW~P被证明可以在翻译后的水平上刺激EPS生物合成.
检测到EpsW~P和EpsZ之间的直接相互作用,EpsW增强了EpsZ的酶活性.
结构建模显示,EpsZ缺乏在*S. enterica* WbaP中发现的同位体化β-hairpin,而EpsW~P促进了稳定的EpsZ二元体形成.

结论:

一个新的调节模型提出EpsW~P全质地促进了活性,二维EpsZ构造的形成,从而激活了EPS生物合成.
这种翻译后激活机制代表了调节多糖生物合成启动的新范式.
单域响应调节器对大型单种PGT的调节在菌菌和潜在的其他细菌群体中可能广泛存在.

关键词:

在Wzxx中使用.这就是为什么Wzy Wzy.monoPGTT 的使用情况.糖基转移酶是一种糖基转移酶.聚糖生物合成的多糖化物.接近性标签的标签.响应调节器响应调节器的响应

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