Phosphorylation Site Mass Spectrometry Analysis

Mass spectrometry plays an important role in phosphorylation analysis and can be used for site identification and quantitative analysis of phosphorylated proteins. Biotech Park provides mass spectrometry detection services for protein phosphorylation sites.

Phosphorylation and Phosphorylation Sites

Phosphorylation is an important covalent post-translational modification (PTM) in cell signaling pathways. This modification is reversible and catalyzed by protein kinases. Studies have shown that over 30% of eukaryotic proteins undergo phosphorylation. Phosphorylation modifications mainly regulate target proteins through two mechanisms: (1) Phosphorylation may cause conformational changes in the structure of modified proteins (such as enzymes and receptors), thereby 'turning on' or 'turning off' their function; (2) Phosphorylation alters the affinity of proteins for their effectors, enabling the phosphorylated proteins to recruit or release their downstream effectors. Phosphorylation modifications can regulate a wide range of biological activities, such as cell growth, cell metabolism, and cell division.

In eukaryotes, phosphorylation can occur on residues such as serine, threonine, tyrosine, and histidine. Identifying phosphorylation sites of specific target proteins, as well as broader phosphorylation sites within the proteome, is crucial for comprehensively studying the functional roles of protein phosphorylation and analyzing signaling networks.

Mass Spectrometry Analysis of Phosphorylation Sites

Mass Spectrometry Detection of Phosphorylation Sites

Mass spectrometry is one of the techniques used to identify protein phosphorylation sites, often coupled with liquid chromatography. In mass spectrometry-based phosphorylation site detection, protein samples are first digested into peptides by proteases. Due to the low stoichiometry of phosphorylated peptides compared to unmodified peptides, enrichment of phosphorylated peptides is required before liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. Tandem mass spectrometry measures the mass of intact peptides and fragment ions, and bioinformatics analysis is used to match these experimental data with theoretical spectra derived from sequence databases to achieve phosphorylation site analysis.

Related Services

Post-Translational Modification Proteomics Analysis
Phosphorylation Quantitative Proteomics