菌根菌PhoH2的结构和功能表征,并确定其酶活性的潜在抑制剂
Shivangi1,2, Yasmeen Khan1,2, Mary Krishna Ekka1,2
1CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi, 110007, India.
概括
菌根菌PhoH2 (Mt-PhoH2) 具有ATPase和GTPase活性,这对细菌的生存和病变产生至关重要. 它的功能依赖于金属,Mg2+离子优化活性,并且已经确定了潜在的抑制剂.
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:
- 结核菌菌具有复杂的信号网络,对生存和发病至关重要.
- 菌根菌PhoH2 (Mt-PhoH2) 是一种信号蛋白,参与酸盐饥饿反应和依赖ATP的功能.
研究的目的:
- 描述Mt-PhoH2.2.的生物物理,生物化学和计算特性.
- 研究Mt-PhoH2.2.的酶活性,金属离子依赖性和结构特征.
- 为了确定Mt-PhoH2活动的潜在抑制剂.
主要方法:
- 使用了生物物理,生物化学和计算分析.
- 进行了酶分析以确定ATPase和GTPase活动.
- 循环二极化 (CD) 光谱法用于分析二次结构.
- 进行了in silico选,以确定潜在的抑制剂.
主要成果:
- Mt-PhoH2表现出ATPase和GTPase活动,依赖于金属离子,Mg2+观察到的最佳活性是Mg2+.
- 确定了GTP水解的动态参数,显示与ATP相比,GTP的活性和结合亲和力发生了变化.
- 发现ADP和GDP可以抑制ATPase和GTPase活动.
- CD光谱检测显示了ATP和GTP结合时的形状变化.
- 在in silico选中确定了ML141和NAV_2729作为潜在的Mt-PhoH2抑制剂.
- 麻菌株Mt-PhoH2的生长率降低,这表明它发挥了重要的作用.
结论:
- Mt-PhoH2作为一种依赖金属的酶,具有ATPase和GTPase活动,受基质结合的影响.
- 鉴定到的抑制剂需要进一步研究对抗Mycobacterium tuberculosis的治疗潜力.
- Mt-PhoH2对于菌根菌的生长至关重要,并在酸盐饥饿和毒素-抗毒素系统中发挥作用.
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