Z-Tyr-Ser-OH

Z-Tyr-Ser-OH, also known as N-Carbobenzoxy-L-tyrosyl-L-serine, is a synthetic dipeptide featuring a protected tyrosine residue linked to serine. Its structure incorporates a benzyloxycarbonyl group (Z or Cbz) at the N-terminus, which serves as a protective group during peptide synthesis, preventing unwanted side reactions and facilitating the stepwise construction of longer peptide chains. The presence of both aromatic and hydroxyl functionalities within this molecule enables it to participate in a variety of selective coupling reactions, making it a valuable intermediate for researchers and chemists working in peptide chemistry and related fields. Owing to its stability and compatibility with common synthetic protocols, Z-Tyr-Ser-OH is widely utilized in laboratories focused on developing novel peptide sequences, optimizing synthetic methodologies, and studying structure-activity relationships in bioactive peptides.

Peptide Synthesis: Z-Tyr-Ser-OH is primarily employed as a building block in the synthesis of longer peptides and small proteins. Its protected tyrosine allows for selective deprotection and coupling, enabling chemists to construct complex sequences with high precision. By incorporating this dipeptide into solid-phase or solution-phase peptide synthesis workflows, researchers can efficiently assemble peptides containing tyrosine-serine motifs, which are prevalent in many biologically active molecules. The product's compatibility with various coupling reagents and its stability under typical synthetic conditions ensure high yields and reproducibility, making it a staple in the peptide synthesis toolbox.

Enzymatic Substrate Studies: The dipeptide serves as a model substrate for investigating the specificity and kinetics of proteases and peptidases. Researchers utilize Z-Tyr-Ser-OH to probe enzyme active sites, gain insights into substrate recognition, and elucidate catalytic mechanisms. By monitoring the cleavage of this substrate under controlled conditions, scientists can characterize enzyme behavior, screen for inhibitors, and design experiments that inform the development of therapeutic agents targeting peptide-processing enzymes. Its defined sequence and protective group facilitate selective studies without interference from side reactions.

Structure-Activity Relationship Research: As an intermediate with both aromatic and polar side chains, N-Carbobenzoxy-L-tyrosyl-L-serine is invaluable in the systematic study of structure-activity relationships (SAR) within peptide libraries. By incorporating this dipeptide into various analogs, researchers can assess the impact of tyrosine and serine residues on biological activity, receptor binding, and molecular recognition. Such SAR studies are crucial for optimizing lead compounds in pharmaceutical research, as well as for understanding the fundamental principles governing peptide function and interaction.

Combinatorial Chemistry: The protected dipeptide finds extensive use in combinatorial chemistry approaches aimed at generating diverse peptide libraries. Z-Tyr-Ser-OH enables rapid assembly of sequence variants through orthogonal protection strategies and automated synthesis platforms. By serving as a core unit in library construction, it facilitates the exploration of sequence diversity and the identification of novel bioactive peptides. Its reliability and ease of incorporation streamline the process of generating large numbers of compounds for high-throughput screening and discovery.

Bioconjugation and Labeling: Researchers leverage the functional groups present in this dipeptide for bioconjugation and labeling applications. The phenolic hydroxyl of tyrosine and the primary alcohol of serine provide reactive handles for attaching fluorescent dyes, affinity tags, or other moieties. Such modifications are critical in the development of probes for imaging, affinity purification, and studying protein-protein interactions. The protective group can be selectively removed to expose reactive sites at desired stages, ensuring precise control over the conjugation process.

Z-Tyr-Ser-OH stands as a versatile and indispensable reagent in modern peptide research, supporting advances in synthetic methodology, enzymology, SAR exploration, combinatorial library generation, and bioconjugation strategies. Its unique structural features and practical utility continue to drive innovation in peptide science, enabling researchers to address complex questions in chemistry, biology, and drug discovery.

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