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Title: Increasing the Separation Capacity of Intact Histone Proteoforms Chromatography Coupling Online Weak Cation Exchange-HILIC to Reversed Phase LC UVPD-HRMS

Abstract

Top-down proteomics is an emerging analytical strategy to characterize combinatorial protein post-translational modifications (PTMs). However, sample complexity and small mass differences between chemically closely related proteoforms often limit the resolution attainable by separations employing a single liquid chromatographic (LC) principle. In particular, for ultra-modified proteins like histones, extensive and time-consuming fractionation is needed to achieve deep proteoform coverage. Herein, we present the first online nano-flow comprehensive two-dimensional liquid chromatography (nLC×LC) platform top-down mass spectrometry analysis of histone proteoforms. The described two-dimensional LC system combines weak cation exchange chromatography under hydrophilic interaction LC conditions (i.e. charge- and hydrophilicity-based separation) with reversed phase liquid chromatography (i.e. hydrophobicity-based separation). The two independent chemical selectivities were run at nanoflows (300 nL/min) and coupled online with high-resolution mass spectrometry employing ultraviolet photodissociation (UVPD-HRMS). The nLC×LC workflow increased the number of intact protein masses observable relative to one-dimensional approaches and allowed characterization of hundreds of proteforms starting from limited sample quantities (~1.5 µg).

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [2];  [2];  [2];  [1];  [2]
  1. Center for Analytical Sciences Amsterdam (The Netherlands); Vrije Universiteit Amsterdam (The Netherlands)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1507723
Report Number(s):
PNNL-SA-138847
Journal ID: ISSN 1535-3893
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Proteome Research
Additional Journal Information:
Journal Volume: 17; Journal Issue: 11; Journal ID: ISSN 1535-3893
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; histones; online comprehensive two-dimensional liquid chromatography; post-translational modifications; top-down mass spectrometry; ultraviolet photodissociation

Citation Formats

Gargano, Andrea F. G., Shaw, Jared B., Zhou, Mowei, Wilkins, Christopher S., Fillmore, Thomas L., Moore, Ronald J., Somsen, Govert W., and Pasa Tolic, Ljiljana. Increasing the Separation Capacity of Intact Histone Proteoforms Chromatography Coupling Online Weak Cation Exchange-HILIC to Reversed Phase LC UVPD-HRMS. United States: N. p., 2018. Web. doi:10.1021/acs.jproteome.8b00458.
Gargano, Andrea F. G., Shaw, Jared B., Zhou, Mowei, Wilkins, Christopher S., Fillmore, Thomas L., Moore, Ronald J., Somsen, Govert W., & Pasa Tolic, Ljiljana. Increasing the Separation Capacity of Intact Histone Proteoforms Chromatography Coupling Online Weak Cation Exchange-HILIC to Reversed Phase LC UVPD-HRMS. United States. https://doi.org/10.1021/acs.jproteome.8b00458
Gargano, Andrea F. G., Shaw, Jared B., Zhou, Mowei, Wilkins, Christopher S., Fillmore, Thomas L., Moore, Ronald J., Somsen, Govert W., and Pasa Tolic, Ljiljana. Tue . "Increasing the Separation Capacity of Intact Histone Proteoforms Chromatography Coupling Online Weak Cation Exchange-HILIC to Reversed Phase LC UVPD-HRMS". United States. https://doi.org/10.1021/acs.jproteome.8b00458. https://www.osti.gov/servlets/purl/1507723.
@article{osti_1507723,
title = {Increasing the Separation Capacity of Intact Histone Proteoforms Chromatography Coupling Online Weak Cation Exchange-HILIC to Reversed Phase LC UVPD-HRMS},
author = {Gargano, Andrea F. G. and Shaw, Jared B. and Zhou, Mowei and Wilkins, Christopher S. and Fillmore, Thomas L. and Moore, Ronald J. and Somsen, Govert W. and Pasa Tolic, Ljiljana},
abstractNote = {Top-down proteomics is an emerging analytical strategy to characterize combinatorial protein post-translational modifications (PTMs). However, sample complexity and small mass differences between chemically closely related proteoforms often limit the resolution attainable by separations employing a single liquid chromatographic (LC) principle. In particular, for ultra-modified proteins like histones, extensive and time-consuming fractionation is needed to achieve deep proteoform coverage. Herein, we present the first online nano-flow comprehensive two-dimensional liquid chromatography (nLC×LC) platform top-down mass spectrometry analysis of histone proteoforms. The described two-dimensional LC system combines weak cation exchange chromatography under hydrophilic interaction LC conditions (i.e. charge- and hydrophilicity-based separation) with reversed phase liquid chromatography (i.e. hydrophobicity-based separation). The two independent chemical selectivities were run at nanoflows (300 nL/min) and coupled online with high-resolution mass spectrometry employing ultraviolet photodissociation (UVPD-HRMS). The nLC×LC workflow increased the number of intact protein masses observable relative to one-dimensional approaches and allowed characterization of hundreds of proteforms starting from limited sample quantities (~1.5 µg).},
doi = {10.1021/acs.jproteome.8b00458},
journal = {Journal of Proteome Research},
number = 11,
volume = 17,
place = {United States},
year = {Tue Sep 18 00:00:00 EDT 2018},
month = {Tue Sep 18 00:00:00 EDT 2018}
}

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Cited by: 38 works
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Figures / Tables:

Table 2 Table 2: Unique Histone Proteoforms Identified Using ProSight Absolute Mass Search against the Human Proteomea

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Works referencing / citing this record:

Top-down characterization of mouse core histones
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Top-down Mass Spectrometry Analysis of Human Serum Autoantibody Antigen-Binding Fragments
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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.