Article (Scientific journals)
MALDI In-Source Decay, from sequencing to imaging
Debois, Delphine; Smargiasso, Nicolas; Demeure, Kevin et al.
2013In Topics in Current Chemistry, 331, p. 117-141
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Keywords :
MALDI; In Source Decay; Sequencing; Post-Translational Modifications; Imaging
Abstract :
[en] MALDI is now a mature method allowing the identification and, more challenging, the quantification of biopolymers (proteins, nucleic acids, glycans…). MALDI spectra show mostly intact singly charged ions. To obtain fragments, the activation of singly charged precursors is necessary, but not efficient above 3.5 kDa thus making MALDI MS/MS difficult for large species. In-source decay (ISD) is a prompt fragmentation reaction that can be induced thermally or by radicals. As fragments are formed in the source, precursor ions cannot be selected; however, the technique is not limited by the mass of the analyzed compounds and pseudo MS/MS can be performed on intense fragments. The discovery of new matrices that enhance the ISD yield, combined with the high sensitivity of MALDI mass spectrometers, and software development, opens new perspectives. We first review the mechanisms involved in the ISD processes, then discuss ISD applications like top-down sequencing and post-translational modifications studies, and finally review MALDI-ISD tissue imaging applications.
Research center :
CART - Centre Interfacultaire d'Analyse des Résidus en Traces - ULiège
Giga-Systems Biology and Chemical Biology - ULiège
Disciplines :
Chemistry
Author, co-author :
Debois, Delphine ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Smargiasso, Nicolas ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Demeure, Kevin ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Asakawa, Daiki
Zimmerman, Tyler ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Quinton, Loïc  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie biologique
De Pauw, Edwin  ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Language :
English
Title :
MALDI In-Source Decay, from sequencing to imaging
Publication date :
2013
Journal title :
Topics in Current Chemistry
ISSN :
0340-1022
eISSN :
1436-5049
Publisher :
Springer, Berlin, Germany
Volume :
331
Pages :
117-141
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 27 October 2012

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