arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.11241q-bio.QM
收藏

从元蛋白质组学数据集进行肽识别的深度学习

Deep learning for peptide identification from metaproteomics datasets

Xuan Guo, Shichao Feng

摘要:

元蛋白质组学在微生物组研究中得到了广泛的应用,以深入了解微生物群落的功能状态。目前的元蛋白质组学研究一般是基于高通量串联质谱(MS/MS)与液相色谱联用。从MS数据中识别肽和蛋白质涉及根据预定义的蛋白质序列数据库搜索MS/MS光谱并将得分最高的肽分配给光谱的计算程序。现有的计算工具仍然远远不能从从元蛋白质组样本获得的大型MS/MS数据集中提取所有信息。在本文中,我们提出了一种基于深度学习的算法,称为DeepFilter,用于提高串联质谱集合中的置信肽识别率。与其他后处理工具相比,包括Percolator,Q-ranker,PeptideProphet和Iprophet,DeepFilter在海洋微生物和土壤微生物元蛋白质组样本中分别识别出20%和10%的肽谱匹配和蛋白质,错误发现率为1%。

英文摘要:

Metaproteomics are becoming widely used in microbiome research for gaining insights into the functional state of the microbial community. Current metaproteomics studies are generally based on high-throughput tandem mass spectrometry (MS/MS) coupled with liquid chromatography. The identification of peptides and proteins from MS data involves the computational procedure of searching MS/MS spectra against a predefined protein sequence database and assigning top-scored peptides to spectra. Existing computational tools are still far from being able to extract all the information out of large MS/MS datasets acquired from metaproteome samples. In this paper, we proposed a deep-learning-based algorithm, called DeepFilter, for improving the rate of confident peptide identifications from a collection of tandem mass spectra. Compared with other post-processing tools, including Percolator, Q-ranker, PeptideProphet, and Iprophet, DeepFilter identified 20% and 10% more peptide-spectrum-matches and proteins, respectively, on marine microbial and soil microbial metaproteome samples with false discovery rate at 1%.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑