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Identification and Quantitation of Signal Molecule-Dependent Protein Phosphorylation

 Last Update: 2021-03-14
 Source: Internet
 Author: User

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Phosphoproteomics is a fast-growing field that aims at characterizing phosphorylated proteins in a cell or a tissue at a given time. Phosphorylation of proteins is an important regulatory mechanism in many cellular processes. Gel-free phosphoproteome technique involving enrichment of phosphopeptide coupled with mass spectrometry has proven to be invaluable to detect and characterize phosphorylated proteins. In this chapter, a gel-free quantitative approach involving
15
N metabolic labelling in combination with phosphopeptide enrichment by titanium dioxide (TiO
2
) and their identification by MS is described. This workflow can be used to gain insights into the role of signalling molecules such as cyclic nucleotides on regulatory networks through the identification and quantification of responsive phospho(proteins).

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