人类cis-prenyltransferase复合体中全调节的结构机制
Moshe Giladi1,2, Shiri Kredi3, Carlo Guardiani4
1Department of Physiology and Pharmacology, Gray Faculty of Medical and Health Sciences, Tel-Aviv University, Tel-Aviv, Israel. moshegil@post.tau.ac.il.
Nature communications
|November 28, 2025
概括
人类的cis-prenyltransferase (hcis-PT) 活性由Nogo-B受体 (NgBR) 通过一种全osteric机制来调节. 特定的NgBR残留物充当通信枢纽,调节酶功能并提供治疗点.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 酶学 是一种酶学.
背景情况:
- 人类cis-prenyltransferase (hcis-PT) 对于合成长链异oprenoids至关重要,对于N链蛋白质糖化至关重要.
- 由DHDDS和Nogo-B受体 (NgBR) 组成的hcis-PT复合体表现出NGBR增强的活性,但调节机制尚不清楚.
研究的目的:
- 通过NGBR阐明人类cis-prenyltransferase中的全调节的分子基础.
- 调查hcis-PT综合体内的结构动态和通信通道.
主要方法:
- 结晶学以确定hcis-PT的阿波结构.
- -交换质谱法 (HDX-MS) 用于评估基质诱导的稳定性.
- 分子动力学 (MD) 模拟和网络分析用于通信通道的识别.
- 功能性突变发生扫描以识别关键残留物.
主要成果:
- 阿波结构显示局部灵活性,而HDX-MS显示了基质诱导的稳定在NgBRβD-βE循环,一个全枢纽.
- NgBRS249被确定为对酶活性至关重要,在子单位间通信中起到中心节点的作用.
- MD模拟表明,NgBRS249的扰动破坏了全性通路,影响了酶活性.
结论:
- 在分单元间接口的动态调节网络通过全信号控制hcis-PT活动.
- 特定的NgBR残留物通过保存的子单元协调机制调节DHDDS活动.
- 这项研究为治疗针对hcis-PT相关疾病的治疗提供了洞察力.
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