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Proc Natl Acad Sci U S A. 2004 Jun 29;101(26):9528-33. Epub 2004 Jun 21.

Peptide and protein sequence analysis by electron transfer dissociation mass spectrometry.

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  • 1Engineering Physics Program, University of Virginia, Charlottesville, VA 22901, USA.

Abstract

Peptide sequence analysis using a combination of gas-phase ion/ion chemistry and tandem mass spectrometry (MS/MS) is demonstrated. Singly charged anthracene anions transfer an electron to multiply protonated peptides in a radio frequency quadrupole linear ion trap (QLT) and induce fragmentation of the peptide backbone along pathways that are analogous to those observed in electron capture dissociation. Modifications to the QLT that enable this ion/ion chemistry are presented, and automated acquisition of high-quality, single-scan electron transfer dissociation MS/MS spectra of phosphopeptides separated by nanoflow HPLC is described.

PMID:
15210983
[PubMed - indexed for MEDLINE]
PMCID:
PMC470779
Free PMC Article

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