Resonant neutral particle emission in collisions of electrons with protonated peptides with disulfide bonds at high energies
Artikel i vetenskaplig tidskrift, 2011

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.

gas-phase

ion/ion reactions

polypeptide ions

hydrogen-atom adducts

electrostatic storage-ring

capture

attachment

dissociation

amide bond

peptides

model peptide

helical

Författare

T. Tanabe

National Institute of Radiological Sciences

High Energy Accelerator Research Organization

K. Noda

National Institute of Radiological Sciences

S. Miyagi

Toyohashi University of Technology

N. Kurita

Toyohashi University of Technology

S. Tanaka

Kobe University

J. Setzler

Karlsruher Institut für Technologie (KIT)

W. Wenzel

Karlsruher Institut für Technologie (KIT)

Evgeni B. Starikov

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

G. Cuniberti

Technische Universität Dresden

Pohang University of Science and Technology

Chemical Physics Letters

0009-2614 (ISSN)

Vol. 504 83-87

Ämneskategorier

Fysikalisk kemi

DOI

10.1016/j.cplett.2011.01.058