Cited by 45Mass Spectrometry Techniques and ApplicationsAdvanced Proteomics Techniques and ApplicationsProtein Structure and Dynamics

Top‐down mass spectrometry of intact membrane protein complexes reveals oligomeric state and sequence information in a single experiment

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Konijnenberg, Albert, Bannwarth, Ludovic, Yilmaz, Duygu, Koçer, Armağan, Venien‐Bryan, Catherine, Sobott, Frank·2015·Protein Science

Abstract

Here we study the intact stoichiometry and top‐down fragmentation behavior of three integral membrane proteins which were natively reconstituted into detergent micelles: the mechano‐sensitive ion channel of large conductance (MscL), the Kirbac potassium channel and the p7 viroporin from the hepatitis C virus. By releasing the proteins under nondenaturing conditions inside the mass spectrometer, we obtained their oligomeric sizes. Increasing the ion activation (collision energy) causes unfolding and subsequent ejection of a highly charged monomer from the membrane protein complexes. Further increase of the ion activation then causes collision‐induced dissociation (CID) of the ejected monomers, with fragments observed which were predominantly found to stem from membrane‐embedded regions. These experiments show how in a single experiment, we can probe the relation between higher‐order structure and protein sequence, by combining the native MS data with fragmentation obtained from top‐down MS.

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Authors
Konijnenberg, A., Bannwarth, L., Yilmaz, D., Koçer, A., Venien‐Bryan, C., & Sobott, F.
Affiliations
  • University of Antwerp (BE)
  • Institut de minéralogie, de physique des matériaux et de cosmochimie (FR)
  • University of Groningen (NL)
  • Bioinformatique et BioPhysique, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Université Pierre et Marie Curie Paris France
Corresponding author
Sobott, Frank
Venue
Protein Science
Publisher
Wiley
Published
2015-05-29
Volume
24
Issue
8
Pages
1292-1300
ISSN
  • 0961-8368 (ISSN-L)
  • 1469-896X
OpenAlex
W2115690303
Cited by
45
References
52
Citations by year
2025: 4 · 2024: 1 · 2023: 8 · 2022: 3 · 2021: 4 · 2020: 7 · 2019: 7 · 2018: 3 · 2017: 5 · 2016: 1 · 2015: 2
FWCI
1.64
Type
journal article
Language
en
Open access
Locations
  • Protein Science (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (publishedVersion, other-oa)
  • HAL (submittedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, other-oa)
Funders
Hercules foundation
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 › Protein Structure and Dynamics
Keywords
top-down mass spectrometry, native mass spectrometry, membrane protein complexes, oligomeric state, hepatitis C virus, detergent micelles, collision-induced dissociation, ion activation, protein unfolding, protein stoichiometry
MeSH terms
Amino Acid Sequence, Hepatitis C, Humans, Ion Channels, Models, Molecular, Molecular Sequence Data, Viral Proteins, Potassium Channels, Hepacivirus, Spectrometry, Mass, Electrospray Ionization, Protein Multimerization

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