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首页> 外文期刊>The Journal of Antibiotics: An International Journal >Liquid chromatography-tandem mass spectrometry characterization of five new leucinostatins produced by Paecilomyces lilacinus CG-189
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Liquid chromatography-tandem mass spectrometry characterization of five new leucinostatins produced by Paecilomyces lilacinus CG-189

机译:淡紫色拟青霉CG-189生产的五种新亮抑素的液相色谱-串联质谱表征

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摘要

The fungus Paecilomyces lilacinus produces leucinostatins-peptaibiotics that exert a range of biological activities including antimalarial, antiviral, antitumor and phytotoxicity. In this paper, we developed an analytical method employing LC-MS/MS in the precursor ion and product ion scan modes to elucidate five new leucinostatins. Direct Infusion (DI-MS) helped to identify the most abundant leucinostatins: F, D B2, S, A and K. MS/MS analysis using a triple quadrupole operating at different scan modes is a versatile tool to study natural products, especially peptaibiotics. Although DI-MS full-scan analysis is rapid and sensitive, it cannot distinguish between peptide isomers. On the other hand, LC-MS/MS operated in the precursor ion and product ion modes is time consuming, but allows identifying the structure of isomers or isobar in crude extracts.
机译:淡紫色拟青霉菌产生亮白抑素-peptaibiotics,发挥一系列生物活性,包括抗疟疾,抗病毒,抗肿瘤和植物毒性。在本文中,我们开发了一种在前体离子和产物离子扫描模式下采用LC-MS / MS的分析方法,以阐明五种新的亮氨酸他汀类药物。直接输注(DI-MS)有助于鉴定最丰富的白细胞抑素:F,D B2,S,A和K。使用三重四极杆在不同扫描模式下运行的MS / MS分析是研究天然产物(尤其是肽类抗生素)的多功能工具。尽管DI-MS全扫描分析是快速而灵敏的,但它无法区分肽异构体。另一方面,以前体离子和产物离子模式运行的LC-MS / MS很耗时,但可以识别粗提物中的异构体或等压线的结构。

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