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在Trichomonas vaginalis acid sphingomyelinases的理论结构分析中,显示了与蛋白质灵活性和流动性相关的基质结合多样性

Ana Laura Medina-Nieto¹, Sairy Yarely Andrade-Guillen¹, Fátima Berenice Ramírez-Montiel²

¹Departamento de Biología, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Mexico 36050, Mexico.

Computational biology and chemistry

|August 9, 2025

概括

酸髓酶 (aSMases) 是细胞修复中的关键酶. 这项研究揭示了T. vaginalis aSMases的独特结构灵活性,这表明了寄生虫感染的新治疗点.

科学领域:

生物化学生物化学
结构生物学结构生物学
寄生虫学的寄生虫学

背景情况:

酸髓酶 (aSMases) 和中性髓酶 (nSMases) 是具有保存结构但同质性不明的酶.
之前的工作描述了Entamoeba histolytica和Trichomonas vaginalis SMases,并指出了它们的功能差异.
由于AlphaFold3的有限可用性,这阻碍了早期的结构分析.

研究的目的:

通过使用开源AlphaFold3.3来研究T. vaginalis aSMases的结构转变和灵活性.
为了在各种联体条件下比较T. vaginalis aSMase模型与E. histolytica aSMases.
通过分析酶的物理性质来探索潜在的新治疗点.

主要方法:

利用开源AlphaFold3进行T. vaginalis aSMases的结构建模.
采用内部坐标的正常模式分析来评估蛋白质的集体运动.
研究了使用全长斯芬戈美林和Mg2+和Co2+离子的酶行为.

主要成果:

大多数T. vaginalis aSMases的灵活性有限,除了TVAG_271580外,它具有很高的可变性.
尽管观察到灵活性,但CO2+离子抑制了两种生物体的酶.
TVAG_222460 (TvSMase3) 无法用髓进行建模,这表明它具有调节作用.

结论:

T. vaginalis aSMases具有独特的结构性质,包括在一些变体中显著的可变性.
这些发现表明开发针对物理性质的aSMase抑制剂的新策略.
这些抑制剂可以帮助控制寄生虫负担并了解寄生虫病理生物学.

关键词:

阿尔法Fold3是什么意思进化进化进化进化进化进化进化斯芬哥米耶林酶是一种神经基酶.结构结构是一个结构.阴道的三虫 (Trichomonas vaginalis) 已经被发现.

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