Top-Down ETD-MS Provides Unreliable Quantitation of Methionine Oxidation.


Journal

Journal of biomolecular techniques : JBT
ISSN: 1943-4731
Titre abrégé: J Biomol Tech
Pays: United States
ID NLM: 100888641

Informations de publication

Date de publication:
12 2019
Historique:
pubmed: 31 10 2019
medline: 16 5 2020
entrez: 31 10 2019
Statut: ppublish

Résumé

Methionine oxidation plays a critical role in many processes of biologic and biomedical importance, including cellular redox responses and stability of protein pharmaceuticals. Bottom-up methods for analysis of methionine oxidation can suffer from incomplete sequence coverage, as well as an inability to readily detect correlated oxidation between 2 or more methionines. However, the methodology for quantifying protein oxidation in top-down analyses is lacking. Previous work has shown that electron transfer dissociation (ETD)-based tandem mass spectrometry (MS/MS) fragmentation offers accurate and precise quantification of amino acid oxidation in peptides, even in complex samples. However, the ability of ETD-based MS/MS fragmentation to accurately quantify amino acid oxidation of proteins in a top-down manner has not been reported. Using apomyoglobin and calmodulin as model proteins, we partially converted methionines into methionine sulfoxide by incubation in H

Identifiants

pubmed: 31662705
doi: 10.7171/jbt.19-3004-002
pii: JBT_2019-3004-002
pmc: PMC6808186
doi:

Substances chimiques

Apoproteins 0
Calmodulin 0
Myoglobin 0
Peptides 0
Proteins 0
apomyoglobin 0
Hydroxyl Radical 3352-57-6
Methionine AE28F7PNPL
Hydrogen Peroxide BBX060AN9V

Types de publication

Journal Article Research Support, U.S. Gov't, Non-P.H.S.

Langues

eng

Sous-ensembles de citation

IM

Pagination

50-57

Informations de copyright

© Association of Biomolecular Resource Facilities.

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Auteurs

Surendar Tadi (S)

Department of Biomolecular Sciences, University of Mississippi, Oxford, Mississippi, 38677, USA.

Joshua S Sharp (JS)

Department of Biomolecular Sciences, University of Mississippi, Oxford, Mississippi, 38677, USA.

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Classifications MeSH