Cited by 250Mass Spectrometry Techniques and ApplicationsAdvanced Proteomics Techniques and ApplicationsMetabolomics and Mass Spectrometry Studies

An integrated native mass spectrometry and top-down proteomics method that connects sequence to structure and function of macromolecular complexes

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Li, Huilin, Nguyen, Hong Hanh, Ogorzalek Loo, Rachel R., Campuzano, Iain D. G., Loo, Joseph A.·2018·Nature Chemistry

Abstract

Mass spectrometry (MS) has become a crucial technique for the analysis of protein complexes. Native MS has traditionally examined protein subunit arrangements, while proteomics MS has focused on sequence identification. These two techniques are usually performed separately without taking advantage of the synergies between them. Here we describe the development of an integrated native MS and top-down proteomics method using Fourier-transform ion cyclotron resonance (FTICR) to analyse macromolecular protein complexes in a single experiment. We address previous concerns of employing FTICR MS to measure large macromolecular complexes by demonstrating the detection of complexes up to 1.8 MDa, and we demonstrate the efficacy of this technique for direct acquirement of sequence to higher-order structural information with several large complexes. We then summarize the unique functionalities of different activation/dissociation techniques. The platform expands the ability of MS to integrate proteomics and structural biology to provide insights into protein structure, function and regulation.

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  • Because CE separations can be performed in aqueous buffers, protein complexes can be separated in native structures, preserving non-covalent interactions before MS detection.

    “Since CE separations can be performed in aqueous buffers, protein complexes can be separated in their native structures, preserving non-covalent interactions within a protein and between subunits of protein assemblies, prior to MS detection19–21.”
  • The success of native MS depends on ESI of proteins in a volatile aqueous buffer that preserves native quaternary and tertiary states in the gas phase.

    “The success of native MS approaches relies on ESI of proteins in a volatile aqueous buffer that preserves native quaternary and tertiary states in the gas phase19,20.”
  • Native MS provides a proteomics tool that enables identification and characterization of biomolecular structures and advances understanding of biological pathways at the molecular level.

    “Native MS provides a proteomics tool that enables identification and characterization of these biomolecular structures and advances the understanding of their biological pathways at the molecular level19,20,35.”
  • Top-down mass spectrometry (MS)-based proteomics provides a comprehensive analysis of proteoforms to achieve a proteome-wide understanding of protein functions.

    “Top-down mass spectrometry (MS)-based proteomics provides a comprehensive analysis of proteoforms to achieve a proteome-wide understanding of protein functions.”
  • Native MS instruments can transmit and detect high-m/z ions using commercially available time-of-flight, Orbitrap, and Fourier transform ion cyclotron resonance instruments.

    “Today, this is possible using commercially available time-of-flight,33 Orbitrap,34 and Fourier transform ion cyclotron resonance (FTICR)35 instruments.”

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Authors
Li, H., Nguyen, H. H., Ogorzalek Loo, R. R., Campuzano, I. D. G., & Loo, J. A.
Affiliations
  • University of California, Los Angeles (US)
  • Amgen (United States) (US)
Corresponding author
  • Li, Huilin
  • Loo, Joseph A.
Venue
Nature Chemistry
Published
2018-01-01
Volume
10
Issue
2
Pages
139-148
ISSN
  • 1755-4330 (ISSN-L)
  • 1755-4349
OpenAlex
W2781755425
Cited by
249
References
65
Citations by year
2026: 20 · 2025: 26 · 2024: 28 · 2023: 29 · 2022: 25 · 2021: 36 · 2020: 33 · 2019: 34 · 2018: 17
FWCI
13.06
Type
journal article
Language
en
Open access
Locations
  • Nature Chemistry (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • U.S. Department of Energy
  • National Institute of General Medical Sciences (R01GM103479)
  • National Center for Research Resources (S10RR028893)
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Mass Spectrometry Techniques and Applications
  • Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolomics and Mass Spectrometry Studies
Keywords
native mass spectrometry, top-down proteomics, protein complexes, macromolecular complexes, FT-ICR mass spectrometry, protein structure, protein sequences, quaternary structure
MeSH terms
Models, Molecular, Protein Conformation, Mass Spectrometry, Proteomics, Multiprotein Complexes

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