Native Top-Down Mass Spectrometry and Ion Mobility MS for Characterizing the Cobalt and Manganese Metal Binding of α-Synuclein Protein
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Structural characterization of intrinsically disordered proteins (IDPs) has been a major challenge in the field of protein science due to limited capabilities to obtain full-length high-resolution structures. Native ESI-MS with top-down MS was utilized to obtain structural features of protein-ligand binding for the Parkinson’s disease-related protein, α-synuclein (αSyn), which is natively unstructured. Binding of heavy metals has been implicated in the accelerated formation of αSyn aggregation. Using high-resolution Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry, native top-down MS with various fragmentation methods, including electron capture dissociation (ECD), collisional activated dissociation (CAD), and multistage tandem MS (MS 3 ), deduced the binding sites of cobalt and manganese to the C-terminal region of the protein. Ion mobility MS (IM-MS) revealed a collapse toward compacted states of αSyn upon metal binding. The combination of native top-down MS and IM-MS provides structural information of protein-ligand interactions for intrinsically disordered proteins.
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Native MS provides information on protein complex subunit stoichiometry, metal binding, protein interaction partners, and lipid binding.
“Valuable information regarding protein complex subunit stoichiometry [42], metal-binding [43,44], protein interaction partners [45], and lipid binding [46] can be achieved using native MS.”
From Top-down proteomics: challenges, innovations, and applications in basic and clinical research (2020) · cites this paper as [44]
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Neurodegenerative Proteinopathies in the Proteoform Spectrum—Tools and Challenges
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Ion–Ion Charge Reduction Addresses Multiple Challenges Common to Denaturing Intact Mass Analysis
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α-Synuclein condensation in synaptic vesicle function and synucleinopathies
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- Authors
- Wongkongkathep, P., Han, J. Y., Choi, T. S., Yin, S., Kim, H. I., & Loo, J. A.
- Affiliations
- Chulalongkorn University (TH)
- Korea University (KR)
- University of California, Los Angeles (US)
- Corresponding author
- Loo, Joseph A.
- Venue
- Journal of the American Society for Mass Spectrometry
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-06-27
- Volume
- 29
- Issue
- 9
- Pages
- 1870-1880
- ISSN
- 1044-0305 (ISSN-L)
- PMC
- PMC6087494
- OpenAlex
- W2809702123
- Cited by
- 71
- References
- 83
- Citations by year
- 2026: 6 · 2025: 5 · 2024: 2 · 2023: 15 · 2022: 8 · 2021: 7 · 2020: 12 · 2019: 13 · 2018: 3
- FWCI
- 3.78
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Journal of the American Society for Mass Spectrometry (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- eScholarship (California Digital Library) (submittedVersion)
- Funders
- National Institute of General Medical Sciences (R01GM103479)
- U.S. Department of Energy
- 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
- alpha-synuclein, intrinsically disordered proteins, cobalt binding, manganese binding, metal binding sites, protein-ligand interactions, protein aggregation, Parkinson's disease, protein conformational change, native top-down mass spectrometry, ion mobility mass spectrometry, electron capture dissociation
- MeSH terms
- Cobalt, Manganese, Models, Molecular, Spectrometry, Mass, Electrospray Ionization, alpha-Synuclein, Tandem Mass Spectrometry, Intrinsically Disordered Proteins
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