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在素降解肠道共生体 Akkermansia muciniphila 的药物活性化β-glucuronidase上的结构功能研究

Tarushi^1,2, Gagan Deep Gupta^1,2, Mukesh Kumar^1,2

¹Protein Crystallography Section, Bhabha Atomic Research Centre, Mumbai, India.

Journal of biomolecular structure & dynamics

|May 4, 2025

概括

我们发现AmGUS是一种来自Akkermansia muciniphila的新型β-glucuronidase,它可以切割抗癌药物SN38. 这种酶可能会导致药物毒性,并且代表了一种新的GUS酶类.

科学领域:

微生物学微生物学
酶学是一种酶学.
结构生物学结构生物学

背景情况:

肠道微生物β-glucuronidases (mGUS) 影响激素调节,神经递质活性和异生物代谢.
mGUS的活性可以通过促进诸如伊利诺坦 (SN-38) 等抗癌药物的肠肝循环,导致严重的腹.

研究的目的:

为了表达,净化和表征AmGUS,一种来自肠道共生体Akkermansia muciniphila的新型β-glucuronidase.
为了研究AmGUS的基质特异性和结构性质.
探索AmGUS在抗癌药物代谢中的潜在作用.

主要方法:

阿姆古斯的表达和净化.
酶活性测试以确定基质特异性.
用于AmGUS.US结构分析和分类的计算建模.

主要成果:

AmGUS对葡萄糖化物基质表现出特异性,并有效地分裂SN38.38的葡萄糖化形式.
与其他已知的GUS酶不同,AmGUS作为单体起作用.
结构分析表明AmGUS属于一种新的GUS酶类,具有独特的活性位点循环,包括一个新的N终端循环.

结论:

来自A. muciniphila的AmGUS代表了一类具有独特结构特征的β-glucuronidases的新类.
该酶对SN38的活性表明它在药物的肝内循环和潜在的毒性中起作用.
了解AmGUS提供了对人类肠道微生物群的GUSome和A. muciniphila的殖民性的见解.

关键词:

阿克尔曼西亚的木偶生活.格斯·格斯 (Gus Gus) 是一个很好的演员.在SN38-G中使用.毒性毒性毒性毒性毒性毒性毒性毒性毒性毒性毒这是一种β-glucuronidase.

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