title: Statistical Examination of the a and a + 1 Fragment Ions from 193 nm Ultraviolet Photodissociation Reveals Local Hydrogen Bonding Interactions.
abstract: Dissociation of proteins and peptides by 193 nm ultraviolet photodissociation (UVPD) has gained momentum in proteomic studies because of the diversity of backbone fragments that are produced and subsequent unrivaled sequence coverage obtained by the approach. The pathways that form the basis for the production of particular ion types are not completely understood. In this study, a statistical approach is used to probe hydrogen atom elimination from a + 1 radical ions, and different extents of elimination are found to vary as a function of the identity of the C-terminal residue of the a product ions and the presence or absence of hydrogen bonds to the cleaved residue. Graphical Abstract ᅟ.
authors.affiliation: Department of Chemistry, University of Texas, Austin, TX, 78712, USA.
authors.forename: Lindsay J
authors.initials: LJ
authors.lastname: Morrison
authors.affiliation: Department of Chemistry, University of Texas, Austin, TX, 78712, USA.
authors.forename: Jake A
authors.initials: JA
authors.lastname: Rosenberg
authors.affiliation: Department of Chemistry, University of Texas, Austin, TX, 78712, USA.
authors.forename: Jonathan P
authors.initials: JP
authors.lastname: Singleton
authors.affiliation: Department of Chemistry, University of Texas, Austin, TX, 78712, USA. jbrodbelt@cm.utexas.edu.
authors.forename: Jennifer S
authors.initials: JS
authors.lastname: Brodbelt
mesh_terms: D006860:Hydrogen Bonding; D007477:Ions; D010455:Peptides; D040901:Proteomics; D014466:Ultraviolet Rays
chemical_list: D007477:Ions; D010455:Peptides
keywords: Hydrogen-bonding; Tandem mass spectrometry; Ultraviolet photodissociation; a Ion