Fiche publication
Date publication
juin 2018
Journal
Journal of the American Society for Mass Spectrometry
Auteurs
Membres identifiés du Cancéropôle Est :
Dr DELSUC Marc-André
Tous les auteurs :
Floris F, Chiron L, Lynch AM, Barrow MP, Delsuc MA, O'Connor PB
Lien Pubmed
Résumé
Two-dimensional mass spectrometry (2DMS) involves simultaneous acquisition of the fragmentation patterns of all the analytes in a mixture by correlating their precursor and fragment ions by modulating precursor ions systematically through a fragmentation zone. Tandem two-dimensional mass spectrometry (MS/2DMS) unites the ultra-high accuracy of Fourier transform ion cyclotron resonance (FT-ICR) MS/MS and the simultaneous data-independent fragmentation of 2DMS to achieve extensive inter-residue fragmentation of entire proteins. 2DMS was recently developed for top-down proteomics (TDP), and applied to the analysis of calmodulin (CaM), reporting a cleavage coverage of about ~23% using infrared multiphoton dissociation (IRMPD) as fragmentation technique. The goal of this work is to expand the utility of top-down protein analysis using MS/2DMS in order to extend the cleavage coverage in top-down proteomics further into the interior regions of the protein. In this case, using MS/2DMS, the cleavage coverage of CaM increased from ~23% to ~42%. Graphical Abstract Two-dimensional mass spectrometry, when applied to primary fragment ions from the source, allows deep-sequencing of the protein calmodulin.
Mots clés
2DMS, FT-ICR MS, Top-down proteomics
Référence
J. Am. Soc. Mass Spectrom.. 2018 Jun 4;:
