Uncovering Distinct Peptide Charging Behaviors in Electrospray Ionization Mass Spectrometry Using a Large-Scale Dataset.
Uncovering Distinct Peptide Charging Behaviors in Electrospray Ionization Mass Spectrometry Using a Large-Scale Dataset.
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利用大规模数据集揭示电喷雾电离质谱中不同肽的充电行为。
DOI:
10.1021/jasms.3c00325
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发表时间:
2024-01-03
影响因子:
3.2
通讯作者:
Regev, Oded
中科院分区:
文献类型:
--
作者:
Xu, Allyn M.;Tang, Lauren C.;Jovanovic, Marko;Regev, Oded
Electrospray ionization is a powerful and prevalent technique used to ionize analytes in mass spectrometry. The distribution of charges that an analyte receives (charge state distribution, CSD) is an important consideration for interpreting mass spectra. However, due to an incomplete understanding of the ionization mechanism, the analyte properties that influence CSDs are not fully understood. Here, we employ a machine learning-based approach and analyze CSDs of hundreds of thousands of peptides. Interestingly, half of the peptides exhibit charges that differ from what one would naively expect (the number of basic sites). We find that these peptides can be classified into two regimes (undercharging and overcharging) and that these two regimes display markedly different charging characteristics. Notably, peptides in the overcharging regime show minimal dependence on basic site count, and more generally, the two regimes exhibit distinct sequence determinants. These findings highlight the rich ionization behavior of peptides and the potential of CSDs for enhancing peptide identification.
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影响因子:
7.4
作者:
Daub, Christopher D.;Cann, Natalie M.
通讯作者:
Cann, Natalie M.
DOI:
10.1074/mcp.ra117.000314
发表时间:
2017-12
期刊:
Molecular & cellular proteomics : MCP
影响因子:
--
作者:
Bruderer R;Bernhardt OM;Gandhi T;Xuan Y;Sondermann J;Schmidt M;Gomez-Varela D;Reiter L
通讯作者:
Reiter L
DOI:
10.1007/s13361-014-0902-3
发表时间:
2014-08-01
影响因子:
3.2
作者:
Breibeck, Joscha;Serafin, Adam;Skerra, Arne
通讯作者:
Skerra, Arne
影响因子:
7
作者:
Guo, Xiaofeng;Trudgian, David C.;Mirzaei, Hamid
通讯作者:
Mirzaei, Hamid
影响因子:
56.9
作者:
FENN, JB;MANN, M;WHITEHOUSE, CM
通讯作者:
WHITEHOUSE, CM