Capillary Zone Electrophoresis-Tandem Mass Spectrometry As an Alternative to Liquid Chromatography-Tandem Mass Spectrometry for Top-down Proteomics of Histones.
Capillary Zone Electrophoresis-Tandem Mass Spectrometry As an Alternative to Liquid Chromatography-Tandem Mass Spectrometry for Top-down Proteomics of Histones.
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毛细管区电泳串联质谱法作为液态色谱串联质谱法,用于组蛋白自上而下的蛋白质组学。
DOI:
10.1021/acs.analchem.0c04237
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发表时间:
2021-03-16
影响因子:
7.4
通讯作者:
Sun L
中科院分区:
文献类型:
--
作者:
Chen D;Yang Z;Shen X;Sun L
Top-down proteomics (TDP) is an ideal approach for deciphering the histone code and it routinely employs reversed-phase liquid chromatography (RPLC)-tandem mass spectrometry (MS/MS). Because of the extreme complexity of histones regarding the number of proteoforms, new analytical tools with high-capacity separation and highly sensitive detection of proteoforms are required for TDP of histones. Here we present capillary zone electrophoresis (CZE)-MS/MS via the electro-kinetically pumped sheath-flow CE-MS interface for large-scale top-down delineation of histone proteoforms. CZE-MS/MS identified a comparable number of proteoforms to RPLC-MS/MS from a calf histone sample with more than 30-fold less sample consumption (75-ng vs. Three μg), indicating its substantially higher sensitivity. We identified about 400 histone proteoforms from the calf histone sample using two-dimensional size-exclusion chromatography (SEC)-CZE-MS/MS with less than 300-ng proteins consumed. We identified histone proteoforms carrying various tentative post-translational modifications (PTMs), for example, acetylation, methylation (mono-, di-, and tri-), phosphorylation, and succinylation. The electrophoretic mobility (μef) of unmodified histone proteoforms can be predicted accurately (R2 = 0.98) with an optimized semiempirical model based on our recent work. The results render CZE-MS/MS as a useful tool for deciphering the histone code in a proteoform-specific manner and on a global scale.
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影响因子:
7.4
作者:
Chen D;Lubeckyj RA;Yang Z;McCool EN;Shen X;Wang Q;Xu T;Sun L
通讯作者:
Sun L
影响因子:
3.3
作者:
El Kennani S;Crespo M;Govin J;Pflieger D
通讯作者:
Pflieger D
影响因子:
4.1
作者:
CIFUENTES, A;POPPE, H
通讯作者:
POPPE, H
影响因子:
14.8
作者:
Dai, Lunzhi;Peng, Chao;Zhao, Yingming
通讯作者:
Zhao, Yingming
影响因子:
14.8
作者:
Garcia, Benjamin A.;Mollah, Sahana;Hunt, Donald F.
通讯作者:
Hunt, Donald F.