ArticleJournal of the American Society for Mass Spectrometry2012
Conformation-specific spectroscopy of peptide fragment ions in a low-temperature ion trap.
Article in Journal of the American Society for Mass Spectrometry, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Examining the Effect of an Anion-Binding Reagent on the Structure of Deprotonated Leucine Enkephalin Using Cryogenic-Ion Infrared Action Spectroscopy.The journal of physical chemistry. A · 2025Article
- Reconstructing the infrared spectrum of a peptide from representative conformers of the full canonical ensemble.Communications chemistry · 2023Article
- Quantum Chemistry Calculations for Metabolomics.Chemical reviews · 2021Review
- Loss of internal backbone carbonyls: additional evidence for sequence-scrambling in collision-induced dissociation of y-type ions.Journal of the American Society for Mass Spectrometry · 2014Article
- Fragmentation reactions of methionine-containing protonated octapeptides and fragment ions therefrom: an energy-resolved study.Journal of the American Society for Mass Spectrometry · 2013Article
- Parallel β-sheet vibrational couplings revealed by 2D IR spectroscopy of an isotopically labeled macrocycle: quantitative benchmark for the interpretation of amyloid and protein infrared spectra.Journal of the American Chemical Society · 2012Article
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We have applied conformer-selective infrared-ultraviolet (IR-UV) double-resonance photofragment spectroscopy at low temperatures in an ion trap mass spectrometer for the spectroscopic characterization of peptide fragment ions. We investigate b- and a-type ions formed by collision-induced dissociation from protonated leucine-enkephalin. The vibrational analysis and assignment are supported by nitrogen-15 isotopic substitution of individual amino acid residues and assisted by density functional theory calculations. Under such conditions, b-type ions of different size are found to appear exclusively as linear oxazolone structures with protonation on the N-terminus, while a rearrangement reaction is confirmed for the a (4) ion in which the side chain of the C-terminal phenylalanine residue is transferred to the N-terminal side of the molecule. The vibrational spectra that we present here provide a particularly stringent test for theoretical approaches.
Indexed as
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Registered trials
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