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Resonant neutral particle emission in collisions of electrons with protonated peptides with disulfide bonds at high energies

T. Tanabe ; K. Noda ; S. Miyagi ; N. Kurita ; S. Tanaka ; J. Setzler ; W. Wenzel ; Evgeni B. Starikov (Institutionen för kemi- och bioteknik, Fysikalisk kemi) ; G. Cuniberti
Chemical Physics Letters (0009-2614). Vol. 504 (2011), 1-3, p. 83-87.
[Artikel, refereegranskad vetenskaplig]

Electron-ion collisions were studied for various protonated peptide monocations with disulfide bonds, using an electrostatic storage-ring equipped with a merged-electron-beam device. Resonant neutral particle emissions at the energies of 6-7 eV were observed, as well as a rise towards zero-energy, which are typical electron-capture dissociation profiles. The presence of disulfide (S-S) bonds tends to enhance the resonant bump heights. Chemical nature of the amino-acid residues adjacent to cysteines appears to correlate with the bump strength. Molecular-dynamical simulations help clarify the role of molecular vibration modes in the electron-capture dissociation process. (C) 2011 Elsevier B. V. All rights reserved.

Nyckelord: electrostatic storage-ring, hydrogen-atom adducts, capture, dissociation, gas-phase, ion/ion reactions, polypeptide ions, helical, peptides, model peptide, amide bond, attachment

Denna post skapades 2011-03-21.
CPL Pubid: 138215


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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Fysikalisk kemi (2005-2014)


Fysikalisk kemi

Chalmers infrastruktur