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将BrfS集成到生物膜控制级联中,可以在低温下促进菌的生长

Gonzalo Tulin¹, Andrea A E Méndez¹, Nicolás R Figueroa^1,2

¹Instituto de Biología Molecular y Celular de Rosario, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Consejo Nacional de Investigaciones Científicas y Técnicas, Rosario, Argentina.

|February 10, 2025

概括

沙门氏菌是一种沙门氏菌.

科学领域:

微生物学微生物学
分子生物学分子生物学
细菌病原体的产生

背景情况:

生物膜的形成对于细菌的生存至关重要,并且受到各种环境因素的调节.
曲线纤维和甲胺纤维素是 * Salmonella * 和 * Escherichia coli * 中的关键生物膜成分,由转录调节器 CsgD * 控制.
MlrA是一种类似于MerR的调节器,激活*csgD*转录,而MlrB则在巨细胞内抑制它.

研究的目的:

为了表征STM1266,一种特异于菌的MLRA类调节剂,现在被命名为BrfS.
研究BrfS在特定环境条件下的生物膜形成中的作用.
阐明BrfS在控制生物膜成分基因表达中的调节机制.

主要方法:

在不同条件下进行基因表达分析 (最小介质,20°C,盐含量有限的丰富介质).
转录组分析以识别由BrfS.调节的基因.
对 *brfS*, *csgD* 和 *mlrA* 的突变分析 (删除和过度表达).

主要成果:

*brfS*转录在最小介质和20°C时得到上调.
BrfS影响细胞外基质的产生,并控制*csgB*和*bapA*的表达.
BrfS在CsgD依赖的和独立的途径中调节曲线生物合成,在低温下*bapA*转录是BrfS依赖的.

结论:

BrfS是一种影响生物膜形成的*Salmonella*特异性调节剂.
BrfS在curli和*bapA*基因调节中发挥着重要作用,具有不同的机制.
BrfS可能有助于Salmonella在营养限制和低温下的环境持久性.

关键词:

生物膜转录控制的控制细胞外矩阵是细胞外矩阵.低温低温的低温是什么意思这就是MlrA同类.沙门氏菌是一种沙门氏菌.

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