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Updated: Jul 17, 2025

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在WS9326生物合成过程中以P450为媒介的脱氨酸的形成是通过一种特定的乙烯酸二基质基质的脱进行的

Songya Zhang¹, Lin Zhang², Anja Greule³

¹CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.

Acta pharmaceutica Sinica. B

|September 1, 2023

概括

这项研究揭示了细胞染色体P450 Sas酶如何通过直接脱NRPS结合中间体来修改抗生素. 这一发现扩大了我们对P450酶在生物合成中的理解.

科学领域:

生物化学生物化学
分子生物学分子生物学
酶学是一种酶学.

背景情况:

WS9326A是一种类抗生素,具有不寻常的N-甲基-E-2-3-脱氨酸 (NMet-Dht) 残留物.
细胞染色体P450 Sas (P450_Sas) 对于NMet-Dht的形成至关重要,但其在Dht的α,β-脱中确切的作用尚不清楚.

研究的目的:

阐明WS9326A生物合成中P450_Sas介导的α,β脱的基质,时间和机制.
描述P450_Sas的结构和功能性质.

主要方法:

确定P450_Sas基质作为一种特定的NRPS相关的类载体蛋白 (PCP) 结合的二介质.
生物化学试验和P450_Sas的晶体结构分析.

主要成果:

在N-甲基化后,P450_Sas对NRPS结合的双 (Z)-2-pent-1'-enyl-cinnamoyl-Thr-N-Me-Tyr进行作用.
该酶对含有 (Z) -2-pent-1'-enyl-cinnamoyl 组的基质具有特异性.
在P450_Sas中,一个独特的活性部位氨酸 (F250) 对其活性和WS9326A生物合成至关重要.

结论:

P450_Sas直接脱NRPS结合的二基质,在N-甲基化后加入双键.
这项工作扩展了P450酶在修改非核糖体合成酶 (NRPS) 相关基质方面的已知功能.
这些发现提供了对复杂抗生素生物合成的见解.

关键词:

细胞染色体P450的使用.酶的机制酶的机制自然产品是天然产品.非核糖体合成酶的非核糖体合成酶类抗生素是一种抗生素.蛋白质晶体结构蛋白质晶体结构

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