分析Helicobacter pylori GAPDH与宿主分子和半膜的相互作用:抑制半膜结合

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Ane Anil Kumar¹, Priyadharshini T¹, Preethi Ragunathan¹

¹Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.

Biophysical chemistry

|February 6, 2024

概括

杆菌GAPDH与宿主分子结合以进行殖民. 血红素结合抑制了它的活性,这表明它结合了活性部位,金属离子阻断了血红素结合.

科学领域:

微生物学和生物化学
酶学是一种酶学.
宿主-病原体相互作用

背景情况:

甘甲基3-酸盐脱酶 (GAPDH) 是一种月光酶,其作用超出了糖解.
细菌中的细胞外和表面局部GAPDH可以与宿主分子相互作用,帮助殖民.
杆菌的GAPDH (HpGAPDH) 与宿主分子的相互作用及其血结合性质在很大程度上没有被描述.

研究的目的:

研究HpGAPDH与各种宿主分子的结合相互作用.
阐明HpGAPDH在血红素结合中的作用及其功能后果.
为了确定金属离子对HpGAPDH活性和血红素结合的影响.

主要方法:

生物层干涉测量用于量化HpGAPDH与宿主蛋白质 (全转激素,乳激素,血红蛋白,纤维素原,纤维素,酶,等离子素,粘素) 的结合亲和力.
进行了酶活性测试,以评估黑和金属离子结合对HpGAPDH功能的影响.
使用盲目对接模拟来预测血红蛋白在HpGAPDH上的结合部位.

主要成果:

由于HPGAPDH与乳酸铁素和全转移素具有显著的结合亲和关系.
血红素与HpGAPDH结合导致酶活性丧失,表明在活性部位结合.
金属离子抑制了HpGAPDH的活性,并阻止了血红素的结合,这表明活性部位的竞争性抑制.

结论:

HpGAPDH与宿主分子相互作用,可能有助于H. pylori殖民.
血红素与HpGAPDH结合可能发生在活性部位,抑制其酶功能.
金属离子可以抑制HpGAPDH活性和血红素结合,这表明血红素伴侣活性的调节机制.

关键词:

在GAPDH中使用.GAPDH金属抑制的方法 GAPDH-ECM分子相互作用 GAPDH-血红蛋白相互作用型细菌杆菌的 GAPDH GAPDH 的

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