Reducing Peptide Sequence Bias in Quantitative Mass Spectrometry Data with Machine Learning.
Reducing Peptide Sequence Bias in Quantitative Mass Spectrometry Data with Machine Learning.
复制标题
用机器学习减少定量质谱数据中的肽序列偏差。
DOI:
10.1021/acs.jproteome.2c00211
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发表时间:
2022-07-01
影响因子:
4.4
通讯作者:
Noble, William Stafford
中科院分区:
文献类型:
--
作者:
Dincer, Ayse B.;Lu, Yang;Schweppe, Devin K.;Oh, Sewoong;Noble, William Stafford
关键词:
Quantitative mass spectrometry measurements of peptides necessarily incorporate sequence-specific biases that reflect the behavior of the peptide during enzymatic digestion, liquid chromatography, and in the mass spectrometer. These sequence-specific effects impair quantification accuracy, yielding peptide quantities that are systematically under- or over-estimated. We provide empirical evidence for the existence of such biases, and we use a deep neural network, called Pepper, to automatically identify and reduce these biases. The model generalizes to new proteins and new runs within a related set of MS/MS experiments, and the learned coefficients themselves reflect expected physicochemical properties of the corresponding peptide sequences. The resulting adjusted abundance measurements are more correlated with mRNA-based gene expression measurements than the unadjusted measurements. Pepper is suitable for data generated on a variety of mass spectrometry instruments, and can be used with labeled or label-free approaches, and with data-independent or data-dependent acquisition.
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影响因子:
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Springer, Michael
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10.1039/b919484c
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