Global Ion Suppression Limits the Potential of Mass Spectrometry Based Phosphoproteomics.

Details

Serval ID
serval:BIB_09A1E7AB864E
Type
Article: article from journal or magazin.
Collection
Publications
Title
Global Ion Suppression Limits the Potential of Mass Spectrometry Based Phosphoproteomics.
Journal
Journal of Proteome Research
Author(s)
Dreier R.F., Ahrné E., Broz P., Schmidt A.
ISSN
1535-3907 (Electronic)
ISSN-L
1535-3893
Publication state
Published
Issued date
2018
Peer-reviewed
Oui
Volume
18
Number
1
Pages
493-507
Language
english
Abstract
Mass spectrometry based proteomics has become the method of choice for pinpointing and monitoring thousands of post-translational modifications, predominately phosphorylation sites, in cellular signaling studies. Critical for achieving this analytical depth is the enrichment of phosphorylated peptides prior to liquid chromatography-mass spectrometry (MS) analysis. Despite the high prevalence of this modification, the numbers of identified phosphopeptides lag behind those achieved for unmodified peptides, and the cause for this still remains controversial. Here, we use an effective phosphatase protocol that considerably improves global ionization efficiency and, therefore, the overall sensitivity and coverage of standard phosphoproteomics studies. We demonstrate the power of our method on the model system of Salmonella-infected macrophages by extending the current quantitative picture of immune signaling pathways involved in infection. In combination with sensitive, label-free targeted MS for phosphorylation site validation, our approach is ideally suited to exploring cellular phosphorylation based signaling networks in high detail.
Keywords
immune signaling, infection, ion suppression, mass spectrometry, parallel reaction monitoring, phosphoproteomics
Pubmed
Web of science
Create date
28/01/2019 10:58
Last modification date
20/08/2019 13:31
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