Trp-Arg pairs an aromatic indole-containing residue with a strongly basic arginine, enabling π-cation interaction studies. Researchers examine its folding, hydrogen bonding, and solvent behavior. The dipeptide aids in modeling membrane-binding and nucleic-acid interactions. Applications include peptide-design research, spectroscopic studies, and interaction mapping.
CAT No: R2360
CAS No:88831-09-8
Synonyms/Alias:Trp-Arg;88831-09-8;L-Arginine, L-tryptophyl-;tryptophanyl-arginine;L-Tryptophan-L-arginine;H-Trp-Arg-OH;CHEMBL477417;CHEBI:74866;(S)-2-((S)-2-Amino-3-(1H-indol-3-yl)propanamido)-5-guanidinopentanoic acid;(2S)-2-[[(2S)-2-amino-3-(1H-indol-3-yl)propanoyl]amino]-5-(diaminomethylideneamino)pentanoic acid;Tryptophyl-Arginine;L-tryptophyl-L-arginine;L-Trp-L-Arg;L-Tryptophanyl-L-arginine;H-Trp-Arg-OH.2 HCl;SCHEMBL4947728;(2S)-2-[(2S)-2-amino-3-(1H-indol-3-yl)propanamido]-5-carbamimidamidopentanoic acid;HY-P4635;WR;BDBM50266680;FT108193;CS-0655433;Q27144975;
Trp-Arg, also known as Tryptophan-Arginine dipeptide, is a synthetic peptide composed of the amino acids tryptophan and arginine linked via a peptide bond. As a small bioactive molecule, Trp-Arg exhibits unique physicochemical properties derived from its constituent residues, such as the aromatic indole ring of tryptophan and the guanidinium group of arginine. These features contribute to its high solubility in aqueous environments and its potential for engaging in diverse molecular interactions. Due to its size and structure, the dipeptide is readily incorporated into various experimental systems, facilitating its use in a wide range of research and development applications. Its versatility makes it a valuable tool for probing peptide transport, investigating cellular signaling, and exploring the structure-function relationships of peptides in biochemical and biophysical contexts.
Peptide Transport Studies: Trp-Arg serves as a model substrate for investigating peptide transporter systems in both prokaryotic and eukaryotic cells. Researchers utilize this dipeptide to elucidate the mechanisms by which peptide transporters recognize, bind, and translocate small peptides across biological membranes. By tracking the uptake and efflux of Trp-Arg in cell lines or membrane vesicles, scientists gain insights into transporter specificity, kinetics, and regulation, which are essential for understanding nutrient absorption and drug delivery processes.
Protein-Protein Interaction Research: The unique side chains of tryptophan and arginine in this dipeptide make it an effective probe in studies of protein-protein interactions. Its ability to participate in π-cation and hydrogen bonding interactions allows Trp-Arg to mimic or disrupt specific binding motifs within larger protein complexes. Researchers often employ the dipeptide in binding assays, NMR spectroscopy, or crystallography to analyze the contribution of short peptide sequences to the stability and specificity of protein assemblies, thereby advancing the understanding of molecular recognition events.
Antioxidant Activity Investigation: Tryptophan-containing peptides, such as Trp-Arg, are known for their potential antioxidant properties due to the electron-rich indole ring of tryptophan. Scientists explore the capacity of this dipeptide to scavenge free radicals and inhibit oxidative processes in vitro. By assessing its reactivity in chemical assays and cellular models, researchers evaluate how Trp-Arg may contribute to the development of novel antioxidant agents or functional food ingredients that help mitigate oxidative stress.
Cell Signaling Pathway Analysis: The arginine residue in Trp-Arg provides a positive charge and the potential for nitric oxide-related signaling, while tryptophan can engage in aromatic interactions with signaling proteins. This combination enables the dipeptide to serve as a tool for dissecting signal transduction pathways, particularly those involving peptide-mediated receptor activation or inhibition. Experimental systems employing Trp-Arg help clarify the roles of short peptides in modulating cellular responses, such as proliferation, differentiation, or immune activation.
Enzyme Substrate Specificity Studies: Trp-Arg is frequently used to investigate the substrate preferences and catalytic mechanisms of peptidases and proteases. Its defined structure allows for precise mapping of cleavage sites and enzymatic activity, providing valuable information about enzyme selectivity and function. By incorporating the dipeptide into kinetic assays or structural studies, researchers can advance the design of enzyme inhibitors or peptide-based therapeutics.
Biophysical Characterization: In addition to its biochemical applications, Trp-Arg is employed in studies of peptide conformation, aggregation, and stability. Its intrinsic fluorescence, conferred by the tryptophan residue, facilitates monitoring of peptide folding and interactions using spectroscopic techniques. Researchers leverage these properties to investigate the fundamental principles governing peptide behavior in solution and at interfaces, contributing to the broader understanding of peptide science and its technological applications.
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