Identification of triacylglycerol using automated annotation of high resolution multistage mass spectral trees

文献类型： 外文期刊

第一作者： Wang, Xiupin

作者： Wang, Xiupin;Li, Peiwu;Zhang, Qi;Ding, Xiaoxia;Zhang, Wen;Zhang, Liangxiao;Wang, Xiupin;Li, Peiwu;Wang, Xiupin;Li, Peiwu;Zhang, Qi;Ding, Xiaoxia;Zhang, Wen;Zhang, Liangxiao;Wang, Xiupin;Li, Peiwu;Zhang, Qi;Ding, Xiaoxia;Zhang, Wen;Zhang, Liangxiao;Zhang, Qi;Ding, Xiaoxia;Zhang, Wen;Zhang, Liangxiao;Peng, Qingzhi

作者机构：

关键词： Triacylglycerols;Multistage mass (MSn);TAG ion tree (TIT);Referenced Kendrick mass defect (RKMD);"Stage-by-stage elimination" strategy

期刊名称：ANALYTICA CHIMICA ACTA （ 影响因子：6.558； 五年影响因子：6.228 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： High complexity of identification for non-target triacylglycerols (TAGs) is a major challenge in lipidomics analysis. To identify non-target TAGs, a powerful tool named accurate MSn spectrometry generating so-called ion trees is used. In this paper, we presented a technique for efficient structural elucidation of TAGs on MSn spectral trees produced by LTQ Orbitrap MSn, which was implemented as an open source software package, or TIT. The TIT software was used to support automatic annotation of non-target TAGs on MSn ion trees from a self-built fragment ion database. This database includes 19108 simulate TAG molecules from a random combination of fatty acids and corresponding 500582 self-built multistage fragment ions (MS <= 3). Our software can identify TAGs using a "stage-by-stage elimination" strategy. By utilizing the MS1 accurate mass and referenced RKMD, the TIT software can discriminate unique elemental composition candidates. The regiospecific isomers of fatty acyl chains will be distinguished using MS2 and MS3 fragment spectra. We applied the algorithm to the selection of 45 TAG standards and demonstrated that the molecular ions could be 100% correctly assigned. Therefore, the TIT software could be applied to TAG identification in complex biological samples such as mouse plasma extracts. (C) 2016 Elsevier B.V. All rights reserved.

分类号： O65

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