Cited by 72Advanced Proteomics Techniques and ApplicationsMass Spectrometry Techniques and ApplicationsMicrofluidic and Capillary Electrophoresis Applications

In-Line Separation by Capillary Electrophoresis Prior to Analysis by Top-Down Mass Spectrometry Enables Sensitive Characterization of Protein Complexes

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Han, Xuemei, Wang, Yueju, Aslanian, Aaron, Fonslow, Bryan, Graczyk, Beth, Davis, Trisha N., Yates, John R.·2014·Journal of Proteome Research

Abstract

Intact protein analysis via top-down mass spectrometry (MS) provides a bird’s eye view over the protein complexes and complex protein mixtures with the unique capability of characterizing protein variants, splice isoforms, and combinatorial post-translational modifications (PTMs). Here we applied capillary electrophoresis (CE) through a sheathless CE–electrospray ionization interface coupled to an LTQ Velos Orbitrap Elite mass spectrometer to analyze the Dam1 complex from Saccharomyces cerevisiae. We achieved a 100-fold increase in sensitivity compared to a reversed-phase liquid chromatography coupled MS analysis of recombinant Dam1 complex with a total loading of 2.5 ng (12 amol). N-terminal processing forms of individual subunits of the Dam1 complex were observed as well as their phosphorylation stoichiometry upon Mps1p kinase treatment.

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Authors
Han, X., Wang, Y., Aslanian, A., Fonslow, B., Graczyk, B., Davis, T. N., & Yates, J. R.
Affiliations
  • Scripps Research Institute (US)
  • University of Washington (US)
Corresponding author
Yates, John R.
Venue
Journal of Proteome Research
Published
2014-11-09
Volume
13
Issue
12
Pages
6078-6086
ISSN
  • 1535-3893 (ISSN-L)
  • 1535-3907
OpenAlex
W2323293250
Cited by
72
References
52
Citations by year
2026: 3 · 2025: 5 · 2024: 5 · 2023: 3 · 2022: 10 · 2021: 9 · 2020: 2 · 2019: 12 · 2018: 5 · 2017: 8 · 2016: 8 · 2015: 2
FWCI
2.57
Type
journal article
Language
en
Open access
Locations
  • Journal of Proteome Research (publishedVersion, other-oa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (8P41GM103533-17, R01 MH067880)
  • National Heart, Lung, and Blood Institute (HHSN268201000035C)
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
  • Physical Sciences › Chemistry › Spectroscopy › Mass Spectrometry Techniques and Applications
  • Physical Sciences › Engineering › Biomedical Engineering › Microfluidic and Capillary Electrophoresis Applications
Keywords
top-down mass spectrometry, capillary electrophoresis, Dam1 complex, Saccharomyces cerevisiae, protein complexes, top-down proteomics, phosphorylation stoichiometry, Mps1 kinase, N-terminal processing, post-translational modification, protein isoforms, sensitivity enhancement
MeSH terms
Binding Sites, Microtubule-Associated Proteins, Molecular Weight, Phosphorylation, Reproducibility of Results, Protein Serine-Threonine Kinases, Cell Cycle Proteins, Electrophoresis, Capillary, Protein Subunits, Spectrometry, Mass, Electrospray Ionization, Saccharomyces cerevisiae Proteins, Proteomics

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