A multi-purpose, regenerable, proteome-scale, human phosphoserine resource for phosphoproteomics.

A multi-purpose, regenerable, proteome-scale, human phosphoserine resource for phosphoproteomics.
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DOI:
10.1038/s41592-022-01638-5
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发表时间:
2022-11
期刊:
影响因子:
48
通讯作者:
Gygi, Steven P.
Gygi, Steven P.
中科院分区:
生物学1区
文献类型:
--
作者:
Gassaway, Brandon M.;Li, Jiaming;Rad, Ramin;Mintseris, Julian;Mohler, Kyle;Levy, Tyler;Aguiar, Mike;Beausoleil, Sean A.;Paulo, Joao A.;Rinehart, Jesse;Huttlin, Edward L.;Gygi, Steven P.

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Mass-spectrometry-based phosphoproteomics has become indispensable for understanding cellular signaling in complex biological systems. Despite the central role of protein phosphorylation, the field still lacks inexpensive, regenerable, and diverse phosphopeptides with ground-truth phosphorylation positions. Here, we present Iterative Synthetically Phosphorylated Isomers (iSPI), a proteome-scale library of human-derived phosphoserine-containing phosphopeptides that is inexpensive, regenerable, and diverse, with precisely known positions of phosphorylation. We demonstrate possible uses of iSPI, including use as a phosphopeptide standard, a tool to evaluate and optimize phosphorylation-site localization algorithms, and a benchmark to compare performance across data analysis pipelines. We also present AScorePro, an updated version of the AScore algorithm specifically optimized for phosphorylation-site localization in higher energy fragmentation spectra, and the FLR viewer, a web tool for phosphorylation-site localization, to enable community use of the iSPI resource. iSPI and its associated data constitute a useful, multi-purpose resource for the phosphoproteomics community.
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