转录基因和分子对接分析揭示病毒性基因调节介导的抗菌作用的基因二氧化对黄金葡萄球菌的抗菌作用
Jianan Liu1, Junya Zhu2, Hongshun Hao3
1School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China.
Applied biochemistry and biotechnology
|May 6, 2024
概括
异硫酸 (BITC) 通过改变基因表达和蛋白质相互作用,对黄金葡萄球菌表现出抗菌作用. 分子对接证实了BITC的存在.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 金黄色葡萄球菌 (Staphylococcus aureus) 是一个重要的人类病原体.
- 有效的抗菌策略对黄金色杆菌至关重要.
- 异硫酸 (BITC) 是一种潜在的治疗剂.
研究的目的:
- 为了研究BITC对S. aureus的抗菌机制.
- 为了识别受BITC治疗影响的基因和蛋白质.
- 为了探索BITC和S. aureus蛋白质之间的分子相互作用.
主要方法:
- 转录组分析以确定差异表达的基因.
- STRING数据库用于蛋白质-蛋白质相互作用分析.
- 定量逆转录PCR (qRT-PCR) 用于基因表达的验证.
- 分子对接以预测目标蛋白质上的BITC结合点.
主要成果:
- 在亚抑制度的BITC治疗改变了S. aureus中的94个基因,其中52个是下调的.
- 鉴定了由36个差异表达基因编码的蛋白质之间的相互作用.
- 验证了毒性基因的下调:囊多糖合成酶 (cp8F),囊多糖生物合成蛋白 (cp5D) 和热核酶 (nuc).
- 分子对接揭示了BITC与cp8F,cp5D和核蛋白的稳定结合,结合能量从-6.00到-6.60 kcal/mol.
- BITC与蛋白中的特定氨基酸形成疏水性,结合和π-π结合的相互作用.
结论:
- 通过调节基因表达和毒性因子,BITC对S. aureus表现出抗菌活性.
- 分子对接提供了关于BITC与关键S. aureus蛋白质的结合机制的见解.
- 这些发现支持进一步开发BITC作为抗黄金菌感染的抗菌剂.
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