Tyrosyl residue (Tyr)

The tyrosyl residue refers to the amino acid tyrosine as it is incorporated into proteins. It is a standard proteinogenic amino acid (symbol Tyr or Y) with a phenolic side chain, as found in the primary sequence of proteins. Tyrosyl residues can be sites for key post-translational modifications such as phosphorylation (catalyzed by tyrosine kinases; resulting in phosphotyrosine) and sulfation (by tyrosyl-protein sulfotransferases). These modifications are crucial for regulating protein function, mediating signal transduction, enabling protein-protein interactions, and impacting a variety of biological processes and disease mechanisms. However, as a target, "tyrosyl residue" refers to an individual chemical group within many different proteins, not a distinct druggable molecular entity[3][6].

Other names

Tyrosine residueTyr residueY residueTyrosyl group

None specific to the residue itself. However, for drugs targeting proteins with key tyrosyl residue modifications: - Inhibition/activation of kinases or phosphatases altering signaling via phosphotyrosine - Blocking of protein-protein interactions involving sulfated tyrosyl residues