Journal
ANALYTICAL CHEMISTRY
Volume 92, Issue 18, Pages 12193-12200Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.0c01064
Keywords
-
Categories
Funding
- National Science Foundation Division of Materials Research and Division of Chemistry [DMR-1644779]
- State of Florida
- National Institute of General Medical Sciences, National Institutes of Health [P41 GM108569]
- Sherman Fairchild Foundation
Ask authors/readers for more resources
Fourier transform mass spectrometers routinely provide high mass resolution, mass measurement accuracy, and mass spectral dynamic range. In this work, we utilize 21 T Fourier transform ion cyclotron resonance (FT-ICR) to analyze product ions derived from the application of multiple dissociation techniques and/or multiple precursor ions within a single transient acquisition. This ion loading technique, which we call, chimeric ion loading, saves valuable acquisition time, decreases sample consumption, and improves top-down protein sequence coverage. In the analysis of MCF7 cell lysate, we show collision-induced dissociation (CID) and electron-transfer dissociation (ETD) on each precursor on a liquid chromatographymass spectrometry (LC-MS) timescale and improve mean sequence coverage dramatically (CID-only 15% vs chimeric 33%), even during discovery-based acquisition. This approach can also be utilized to multiplex the acquisition of product ion spectra of multiple charge states from a single protein precursor or multiple ETD/proton-transfer reactions (PTR) reaction periods. The analytical utility of chimeric ion loading is demonstrated for top-down proteomics, but it is also likely to be impactful for tandem mass spectrometry applications in other areas.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available