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学科主题: 生命有机化学
题名: Structure-based Mechanistic Insights into Terminal Amide Synthase in Nosiheptide-Represented Thiopeptides Biosynthesis
其他题名: 硫肽nosiheptide生物合成最后一般碳酰胺化被NosA催化形成的结构研究
作者: Liu SS(刘珊珊)1; Guo H(郭恒)1; Zhang TL(张天龙)1; Han L(韩莉)1; Me PF(么鹏飞)1; Zhang Y(张岩)1; Rong NY(荣乃燕)1; Yu Y(虞沂)1; Lan WX(蓝文贤)1; Wang CX(王春喜)1; Ding JP(丁建平)1; Wang RX(王任小)1; Liu W(刘文)1; Cao CY(曹春阳)1
通讯作者: 刘文 ; 曹春阳
刊名: Sci Rep
发表日期: 2015
DOI: 10.1038/srep12744
卷: 5, 页:12744
收录类别: SCI
文章类型: 论文
英文摘要: Nosiheptide is a parent compound of thiopeptide family that exhibit potent activities against various bacterial pathogens. Its C-terminal amide formation is catalyzed by NosA, which is an unusual strategy for maturating certain thiopeptides by processing their precursor peptides featuring a serine extension. We here report the crystal structure of truncated NosA(1-111) variant, revealing three key elements, including basic lysine 49 (K49), acidic glutamic acid 101 (E101) and flexible C-terminal loop NosA(112-151), are crucial to the catalytic terminal amide formation in nosiheptide biosynthesis. The side-chain of residue K49 and the C-terminal loop fasten the substrate through hydrogen bonds and hydrophobic interactions. The side-chain of residue E101 enhances nucleophilic attack of H2O to the methyl imine intermediate, leading to C-alpha-N bond cleavage and nosiheptide maturation. The sequence alignment of NosA and its homologs NocA, PbtH, TpdK and BerI, and the enzymatic assay suggest that the mechanistic studies on NosA present an intriguing paradigm about how NosA family members function during thiopeptide biosynthesis.
语种: 英语
相关网址: 查看原文
WOS记录号: WOS:000359128600001
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/39517
Appears in Collections:生命有机化学国家重点实验室_期刊论文

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作者单位: 1.中科院上海有机化学研究所, 生命有机化学国家重点实验室
2.中科院上海有机化学研究所, 生物与化学交叉研究中心
3.中科院上海生命科学研究院生物化学与细胞生物学研究所

Recommended Citation:
Liu SS,Guo H,Zhang TL,et al. Structure-based Mechanistic Insights into Terminal Amide Synthase in Nosiheptide-Represented Thiopeptides Biosynthesis[J]. Sci Rep,2015,5:12744.
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