Automated Capillary Isoelectric Focusing-Tandem Mass Spectrometry for Qualitative and Quantitative Top-Down Proteomics.
Automated Capillary Isoelectric Focusing-Tandem Mass Spectrometry for Qualitative and Quantitative Top-Down Proteomics.
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自动毛细管等电聚焦量质谱法,用于定性和定量自上而下的蛋白质组学。
DOI:
10.1021/acs.analchem.0c03266
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发表时间:
2020-12-15
影响因子:
7.4
通讯作者:
Sun L
中科院分区:
文献类型:
--
作者:
Xu T;Shen X;Yang Z;Chen D;Lubeckyj RA;McCool EN;Sun L
Top-down proteomics (TDP) aims to delineate proteomes in a proteoform-specific manner, which is vital for accurately understanding protein function in cellular processes. It requires high-capacity separation of proteoforms before mass spectrometry (MS) and tandem MS (MS/MS). Capillary isoelectric focusing (cIEF)-MS has been recognized as a useful tool for TDP in the 1990s because cIEF is capable of high-resolution separation of proteoforms. Previous cIEF-MS studies concentrated on measuring the protein’s mass without MS/MS, impeding the confident proteoform identification in complex samples and the accurate localization of post-translational modifications on proteoforms. Herein, for the first time, we present automated cIEF-MS/MS-based TDP for large-scale delineation of proteoforms in complex proteomes. Single-shot cIEF-MS/MS identified 711 proteoforms from an Escherichia coli (E. coli) proteome consuming only nanograms of proteins. Coupling two-dimensional size-exclusion chromatography (SEC)-cIEF to ESI-MS/MS enabled the identification of nearly 2000 proteoforms from the E. coli proteome. Label-free quantitative TDP of zebrafish male and female brains using SEC-cIEF-MS/MS quantified thousands of proteoforms and revealed sex-dependent proteoform profiles in brains. Particularly, we discovered several proteolytic proteoforms of pro-opiomelanocortin and prodynorphin with significantly higher abundance in male zebrafish brains as potential endogenous hormone proteoforms. Multilevel quantitative proteomics (TDP and bottom-up proteomics) of the brains revealed that the majority of proteoforms having statistically significant difference in abundance between genders showed no abundance difference at the protein group level. This work represents the first multilevel quantitative proteomics study of sexual dimorphism of the brain.
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影响因子:
7.4
作者:
Lubeckyj RA;McCool EN;Shen X;Kou Q;Liu X;Sun L
通讯作者:
Sun L
影响因子:
21.8
作者:
Li H;Nguyen HH;Ogorzalek Loo RR;Campuzano IDG;Loo JA
通讯作者:
Loo JA
影响因子:
5.8
作者:
Kou, Qiang;Xun, Likun;Liu, Xiaowen
通讯作者:
Liu, Xiaowen
DOI:
10.1007/s13361-019-02167-w
发表时间:
2019-08-01
影响因子:
3.2
作者:
Lubeckyj, Rachele A.;Basharat, Abdul Rehman;Sun, Liangliang
通讯作者:
Sun, Liangliang
影响因子:
4.7
作者:
Hahl P;Davis T;Washburn C;Rogers JT;Smith A
通讯作者:
Smith A