从Bambusicola thoracicus中发现和工程硫转移酶SULT1B1
Mingzhu Yan1, Qanli Zhang2, Shuyao Yang3
1School of Biological Engineering, Tianjin University of Science and Technology, Tianjin, 300457, China; National Engineering Research Center of Industrial Enzymes, National Center of Technology Innovation for Synthetic Biology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.
International journal of biological macromolecules
|January 17, 2026
概括
研究人员阐明了SULT1B1的结构和机制,揭示了扩大的基质结合腔. 酶工程产生了一种具有显著增强活性的变体,为药物开发和生物催化剂提供了洞察力.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 酶工程是什么? 酶工程是什么?
背景情况:
- 硫转移酶 (SULT) 是异生菌代谢和激素调节中的关键酶.
- 它们将PAPS中的硫酸盐群转移到各种基板上.
- 了解SULT结构-功能关系对于药物开发至关重要.
研究的目的:
- 确定SULT1B1 (BtSULT1B1) 的第一个蛋白质晶体结构.
- 阐明BtSULT1B1.1.的催化机制和基质结合方式.
- 为了设计一种具有增强酶活性的变体.
主要方法:
- 使用X射线结晶学,以获得BtSULT1B1结构与基质和捐赠体的复合体.
- 结构分析的重点是基板结合口袋和门环特性.
- 用定位突变和分子动力学模拟来设计和研究酶变体.
主要成果:
- 确定了SULT1B1的晶体结构,揭示了其催化机制和基质结合.
- 与人类和小鼠同类相比,BtSULT1B1具有扩大的门环腔,可以容纳更大的基板.
- 一种针对部位的变种,A44S,其活性增加了3.6倍.
结论:
- 这项研究扩大了有关硫转移酶基质结合和酶结构的知识.
- 这些发现为工程 SULT 提供了一个分子基础,以提高活动.
- 结果支持在体外硫化平台的设计,并促进药物开发.
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