Arginylproline is a dipeptide containing a charged guanidinium group and a conformationally restricted proline ring. The motif supports exploration of electrostatic interactions, backbone curvature, and β-turn mimicry. Researchers use it to investigate peptide-protein interfaces and folding pathways. Its compact design aids mechanistic mapping.
CAT No: R2316
CAS No:2418-69-1
Synonyms/Alias:Arginylproline;Arg-pro;2418-69-1;L-Arginyl-L-Proline;H-Arg-Pro-OH;arginyl-proline;RP dipeptide;H-ARG-PRO-OH SULFATE SALT;R-P Dipeptide;Arginine Proline dipeptide;Arginine-Proline dipeptide;L-Proline, 1-L-arginyl-;CHEMBL48223;(2S)-1-[(2S)-2-amino-5-(diaminomethylideneamino)pentanoyl]pyrrolidine-2-carboxylic acid;CHEBI:141419;DTXSID70178886;arginine-proline;(2S)-1-((2S)-2-Amino-5-carbamimidamidopentanoyl)pyrrolidine-2-carboxylate;(2S)-1-[(2S)-2-Amino-5-carbamimidamidopentanoyl]pyrrolidine-2-carboxylate;1-Arginylproline;Substance P1-2;1-2-Substance p;L-Arg-L-pro;1-L-Arginyl-L-proline;SCHEMBL1674799;DTXCID30101377;RP;BDBM50049715;AKOS030622984;FA108240;HY-117110;CS-0063745;(2S)-1-[(2S)-2-AMINO-5-CARBAMIMIDAMIDOPENTANOYL]PYRROLIDINE-2-CARBOXYLIC ACID;
Arginylproline, also known as Arg-Pro or L-Arginyl-L-Proline, is a bioactive dipeptide composed of the amino acids arginine and proline. This compound is recognized for its unique structural properties and its ability to participate in a variety of biochemical processes. As a naturally occurring peptide fragment, it is often studied for its role in enzymatic reactions, peptide research, and the development of functional biomolecules. Its stable peptide bond and compatibility with aqueous environments make it particularly valuable in laboratory settings where precise modeling of peptide interactions is required. Researchers are increasingly interested in arginylproline due to its versatility and its potential to facilitate a deeper understanding of peptide-based mechanisms in both basic and applied sciences.
Peptide Structure-Activity Relationship Studies: Arginylproline serves as a model dipeptide in structure-activity relationship (SAR) investigations, allowing scientists to dissect how specific amino acid sequences influence molecular behavior. By incorporating Arg-Pro into peptide libraries or using it as a reference compound, researchers can examine the impact of the arginine-proline motif on binding affinities, conformational stability, and intermolecular interactions. These insights are crucial for the rational design of peptide analogs and the optimization of bioactive sequences for research and industrial applications.
Enzymatic Substrate for Protease Activity Assays: The dipeptide is frequently employed as a substrate in enzymatic assays aimed at characterizing protease specificity and kinetics. Its straightforward structure enables clear interpretation of proteolytic cleavage patterns, facilitating the identification of enzyme preferences and the mapping of active sites. Utilizing arginylproline in these assays supports the development of novel enzyme inhibitors and the screening of proteolytic enzymes for biotechnological or pharmaceutical research.
Peptide Transport and Uptake Mechanism Research: Arg-Pro is instrumental in studies exploring peptide transport systems across cellular membranes. Its moderate size and defined charge distribution make it an ideal candidate for tracking uptake via peptide transporters, such as PEPT1 and PEPT2. These investigations aid in elucidating the mechanisms by which small peptides are absorbed and distributed within biological systems, providing foundational knowledge for the development of enhanced drug delivery strategies and nutrient absorption models.
Biomaterials and Functional Food Ingredient Development: The dipeptide's compatibility with various matrices has led to its evaluation as a component in biomaterial formulations and functional food products. By integrating arginylproline into hydrogels, coatings, or food supplements, researchers can assess its influence on material properties, bioactivity, and stability. Such studies are instrumental in advancing the design of smart biomaterials and nutraceuticals that leverage the biofunctional potential of specific peptide sequences.
Peptide Synthesis Methodology Optimization: In the field of synthetic chemistry, arginylproline is utilized to refine peptide synthesis protocols and to troubleshoot coupling efficiency and yield. Its well-characterized reactivity profile provides a benchmark for testing new reagents, solid-phase supports, or purification techniques. By serving as a standard in synthetic optimization, it contributes to the development of more efficient and scalable approaches for producing complex peptides and peptide-based compounds.
Bioanalytical Method Development: The application of arginylproline extends to the calibration and validation of analytical techniques such as high-performance liquid chromatography (HPLC) and mass spectrometry. Its defined physicochemical properties make it a suitable reference compound for evaluating method sensitivity, specificity, and reproducibility. Incorporating Arg-Pro into bioanalytical workflows enhances the reliability of peptide quantification and identification, supporting rigorous research in proteomics, metabolomics, and quality control laboratories. Collectively, these diverse applications underscore the significance of arginylproline as a versatile tool in peptide research, enzymology, biomaterials science, and analytical chemistry.
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