Simultaneous Determination of Absolute Configuration and Quantity of Lipopeptides Using Chiral Liquid Chromatography/Mass Spectrometry and Diastereomeric Internal Standards
作者:Reza Nemati、Christopher Dietz、Emily Anstadt、Robert Clark、Michael Smith、Frank Nichols、Xudong Yao
DOI:10.1021/acs.analchem.6b04901
日期:2017.3.21
centers are essential yet challenging. This work uses (3R)- and (3S)-(15-methyl-3-((13-methyltetradecanoyl)oxy)hexadecanoyl)glycyl-l-serine, abbreviated as l-serine-(R+S)-Lipid 654, to develop a method that combines chiral liquid chromatography, a diastereomeric mixture of isotopically labeled internal standards, and multiple reaction monitoring mass spectrometry. The new method allows for simultaneously
脂肽促进先天免疫应答,并与疾病病理学有关。为了研究脂肽的新兴作用,具有多个手性中心的立体异构体的准确测量是必不可少的,但是具有挑战性。这项工作使用(3 R)-和(3 S)-(15-甲基-3-((13-甲基十四烷氧基)氧基)十六烷酰基)甘氨酰-1-丝氨酸,缩写为1-丝氨酸-(R + S-Lipid 654,以开发一种将手性液相色谱法,同位素标记的内标物的非对映异构体混合物和多反应监测质谱法相结合的方法。新方法允许同时确定细菌衍生脂肽的立体异构体的绝对构型和数量。九种评估细菌菌株的总脂质提取物含量不同,但只有1-丝氨酸-脂质654的(R)-亚型。开发的方法还允许对非磷脂作为蜜蜂新型底物的水解进行首次定量分析。毒磷脂酶A2。