O-Phospho-L-tyrosine (CAS 21820-51-9)

O-Phospho-L-tyrosine is an important compound in the area of biochemistry and molecular biology research, particularly because it is a phosphorylated amino acid mimetic. It is used in studies investigating protein phosphorylation, a critical post-translational modification that regulates protein activity, signaling pathways, and cellular processes. This compound serves as an analog for naturally occurring phosphorylated tyrosine residues in proteins, allowing researchers to explore enzyme-substrate interactions, specifically with protein tyrosine kinases and phosphatases. Its stability compared to phosphotyrosine in proteins makes it a useful tool for examining the structural and functional implications of tyrosine phosphorylation in various proteins. Additionally, O-Phospho-L-tyrosine is used in peptide synthesis to produce peptides with defined phosphorylation sites, which are essential for studying signal transduction pathways and for use as substrates in kinase assays. These peptides are for elucidating the mechanisms by which phosphorylation affects protein function and for the development of inhibitors that can modulate these processes.