结核菌Mycobacterium的肝素结合性血凝素蛋白是一种核相关蛋白质
Chetkar Chandra Keshavam1, Saba Naz2, Aanchal Gupta3
1Department of Zoology, University of Delhi, Delhi, India.
The Journal of biological chemistry
|October 21, 2023
概括
结核菌肝素结合性血凝素 (HbhA) 是一种新型核相关蛋白 (NAP),可以调节基因表达. 这种蛋白质作为全球转录抑制剂,影响细菌生存的基本基因调节.
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 遗传学 是一个
背景情况:
- 核素相关蛋白 (NAP) 对细菌的基因表达,毒性和休眠性至关重要.
- 结核菌菌 (Mtb) 使用NAP来维持宿主生存和适应,但其NAP谱系尚未完全理解.
- 在Mtb中的肝素结合性血凝素 (HbhA) 以前被称为粘附分子.
研究的目的:
- 在Mtb.中识别新的NAP.
- 描述肝素结合血蛋白 (HbhA) 蛋白的DNA结合和调节功能.
- 研究HbhA在Mtb基因表达和基因组组织中的作用.
主要方法:
- 生物信息学分析和生物化学实验,以识别和描述HbhA.
- 原子力显微镜可视化HbhA-DNA相互作用.
- 转录组学 (RNA测序) 用于分析hbhA淘汰赛 (KO) 菌株中的基因表达变化.
主要成果:
- HbhA被确定为Mtb.中的一种新型,序列独立的DNA结合蛋白.
- 结合DNA的活性取决于HbhA.的炭基终端域.
- HbhA调节DNA架构,与核体同位,并调节约36%的总和29%的基本基因.
- 删除hbhA导致~73%的差异表达基因的升高调节,表明全球抑制作用.
结论:
- 在Mtb.中,HbhA作为非必不可少的核相关蛋白质起作用.
- HbhA作为全球转录抑制剂,影响了Mtb转录组的很大一部分.
- HbhA在Mtb基因表达和基因组组织中起着调节作用.
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