uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Carbonyl Charge Solvation Patterns May Relate to Fragmentation Classes in Collision-Activated Dissociation
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Computational and Systems Biology.
2012 (English)In: Journal of the American Society for Mass Spectrometry, ISSN 1044-0305, E-ISSN 1879-1123, Vol. 23, no 8, 1319-1325 p.Article in journal (Refereed) Published
Abstract [en]

Here, we investigate the hypothesis that the origin of Class I fragmentation in tryptic peptide dications corresponding to the cleavage of the first two amino acids from the N-terminus is due to a dominant charge solvation pattern. Molecular dynamics simulations (MDS) of model A(n)R dications confirmed the existence of a persistent solvation of the protonated N-terminus on the second backbone carbonyl. Additionally, MDS predicted a new distinct fragmentation class corresponding to the loss of two amino acids from the C-terminus. This prediction was confirmed experimentally at very low excitation levels. The pattern produced by electron transfer dissociation of the same dications gave markedly decreased cleavage frequencies at the second peptide bond, which, within the non-local fragmentation mechanism, supports the preferential charge solvation on the second carbonyl. Taken together, these results confirm the role of a charge solvation pattern in the origin of fragmentation classes.

Place, publisher, year, edition, pages
2012. Vol. 23, no 8, 1319-1325 p.
Keyword [en]
Peptide fragmentation, Gas-phase chemistry, Sequencing, Protonation
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-183908DOI: 10.1007/s13361-012-0418-7ISI: 000307355700003OAI: oai:DiVA.org:uu-183908DiVA: diva2:565374
Available from: 2012-11-07 Created: 2012-11-05 Last updated: 2012-11-07Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
van der Spoel, David
By organisation
Computational and Systems Biology
In the same journal
Journal of the American Society for Mass Spectrometry
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 130 hits
ReferencesLink to record
Permanent link

Direct link