GlycoDeNovo2: An Improved MS/MS-Based De Novo Glycan Topology Reconstruction Algorithm.

GlycoDeNovo2: An Improved MS/MS-Based De Novo Glycan Topology Reconstruction Algorithm.
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DOI:
10.1021/jasms.1c00288
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发表时间:
2022-03-02
影响因子:
3.2
通讯作者:
Hong, Pengyu
Hong, Pengyu
中科院分区:
化学3区
文献类型:
--
作者:
Chen, Zizhang;Wei, Juan;Tang, Yang;Lin, Cheng;Costello, Catherine E.;Hong, Pengyu

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聚糖结构鉴定对于理解聚糖在各种生物过程中的作用至关重要。之前,我们开发了GlycoDeNovo,一种从头算法,用于从串联质谱(MS/MS)重建聚糖拓扑结构。在这项工作中,我们介绍了GlycoDeNovo 2,它包含两个主要的改进GlycoDeNovo。首先,我们使用可能对应于聚糖的峰测量的前体质量来确定其潜在的组成,其用于约束搜索空间,实现并行计算,从而加快拓扑重构。其次,我们开发了一个程序来计算重建拓扑候选的经验p值。提供实验结果以证明GlycoDeNovo 2的有效性。
Glycan structure identification is essential to understanding the roles of glycans in various biological processes. Previously, we developed GlycoDeNovo, a de novo algorithm for reconstructing glycan topologies from tandem mass spectra (MS/MS). In this work, we introduce GlycoDeNovo2 that contains two major improvements to GlycoDeNovo. First, we use the precursor mass measured for a peak that likely corresponds to a glycan to determine its potential compositions, which are used to constrain the search space, enable parallel computation, and hence speed up topology reconstruction. Second, we developed a procedure to calculate the empirical p-value of a reconstructed topology candidate. Experimental results are provided to demonstrate the effectiveness of GlycoDeNovo2.
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