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马尔托德素结合蛋白作为Cronobacter sakazakii在干燥应激下生存的关键因素

Juan Xue¹, Jun Lv¹, Lanfang Liu²

¹Institute of Infection and Immunity, Department of Neurology, Department of Critical Care Medicine,Hubei Provincial Clinical Research Center for Umbilical Cord Blood Hematopoietic Stem Cells, Taihe Hospital, Hubei University of Medicine, Shiyan, Hubei, China.

Food research international (Ottawa, Ont.)

|January 15, 2024

概括

在干燥过程中Cronobacter sakazakii (C. sakazakii) 的生存与特定的基因和一种结合马尔托德素的蛋白质有关. 针对这些因素可以降低婴儿配方奶粉中C. sakazakii污染风险.

科学领域:

微生物学微生物学
食品安全食品安全
细菌病原体的产生

背景情况:

克罗诺巴克特萨卡扎基 (C. sakazakii) 对婴儿构成严重的感染风险,通常是通过受污染的婴儿配方奶粉.
萨卡扎基 (C. sakazakii) 具有显著的抗压能力,即使在巴氏杀菌后也能存活.
了解干燥耐受机制对于预防婴儿感染至关重要.

研究的目的:

识别有助于C. sakazakii干燥耐受性的基本基因和蛋白质.
研究特定基因录音带 (envZ-ompR,recA,flhD) 在生存中的作用.
在干燥条件下探索马尔托德素结合蛋白 (ESA_03421) 的功能.

主要方法:

野生类型和基因淘汰C. sakazakii菌株的比较蛋白质组分析.
确定关键的基因和蛋白质参与干燥生存.
基因淘汰实验,以评估对细菌生存能力的影响.

主要成果:

发现envZ-ompR,recA和flhD的基因磁带对C. sakazakii的干燥耐受性至关重要.
被EnvZ-OmpR,Reca和FlhD调控的马尔托德素结合蛋白 (ESA_03421) 被确定为一个关键因素.
淘汰ESA_03421导致与野生类型菌株相比,可行的C. sakazakii减少了150%.

结论:

EnvZ-OmpR,Reca,FlhD和ESA_03421对于C. sakazakii的干燥耐受性至关重要.
这些发现为针对C. sakazakii.的新型抗菌战略提供了潜在的目标.
通过针对这些生存机制,可以提高婴儿配方奶粉中C. sakazakii污染的减少.

关键词:

克罗诺细菌 sakazakiiii 的时间抗干燥的耐干燥性基因淘汰赛基因淘汰赛马尔托德斯特林结合蛋白质是一种结合蛋白质.蛋白质组学分析

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