Cyclo(D-Leu-L-Pro) creates a rigid diketopiperazine ring that restricts backbone flexibility and enhances stability. Its mixed chirality contributes uncommon conformational preferences. Researchers evaluate its behavior to understand stereochemical effects on ring geometry. Applications include cyclic-peptide design, natural-product mimicry, and conformational studies.
CAT No: R2651
CAS No:36238-67-2
Synonyms/Alias:Cyclo(D-Leu-L-Pro);36238-67-2;Cyclo[D-Leu-L-Pro-];(3R,8aS)-3-(2-methylpropyl)-2,3,6,7,8,8a-hexahydropyrrolo[1,2-a]pyrazine-1,4-dione;Cyclo(L-Pro-D-Leu);CHEMBL463718;CHEBI:182342;DTXSID101157974;HY-N3654;AKOS040763114;FS-8699;(3R,8aS)-3-(2-methylpropyl)-hexahydropyrrolo[1,2-a]pyrazine-1,4-dione;(3R,8aS)-Hexahydro-3-(2-methylpropyl)pyrrolo[1,2-a]pyrazine-1,4-dione;(3R,8aS)-3-isobutyl-2,3,6,7,8,8a-hexahydropyrrolo[1,2-a]pyrazine-1,4-dione;
Cyclo(D-Leu-L-Pro) is a cyclic dipeptide, also known as a diketopiperazine, composed of D-leucine and L-proline residues. As a member of the diketopiperazine family, it exhibits a stable ring structure that confers distinct physicochemical properties, including resistance to enzymatic degradation and increased conformational rigidity compared to linear dipeptides. These characteristics make it a valuable tool in biochemical research, particularly in studies involving peptide stability, molecular recognition, and conformational analysis. Its ability to serve as a model compound for cyclic peptide systems has established its relevance in both fundamental and applied peptide science.
Peptide stability studies: Cyclo(D-Leu-L-Pro) is widely utilized in investigations focused on peptide stability and degradation pathways. The cyclic nature of diketopiperazines offers a model for understanding how structural constraints influence resistance to proteolytic enzymes. Researchers employ this compound to compare the stability of cyclic versus linear peptides under various physiological and experimental conditions, providing insights into peptide design for enhanced durability in research and industrial applications.
Molecular recognition and binding assays: The conformational rigidity of Cyclo(D-Leu-L-Pro) makes it an excellent scaffold for exploring molecular recognition phenomena. Its defined three-dimensional structure allows researchers to probe specific interactions with proteins, nucleic acids, or small molecules. Such studies are instrumental in elucidating the principles of ligand binding, receptor specificity, and the development of molecular probes or affinity reagents based on cyclic peptides.
Peptide synthesis and methodology development: The compound serves as a reference standard and synthetic intermediate in the development and optimization of peptide cyclization strategies. Its well-characterized formation provides a benchmark for evaluating new cyclization reagents, catalysts, or methodologies in solid-phase and solution-phase peptide synthesis. By studying the synthesis and purification of Cyclo(D-Leu-L-Pro), researchers can refine protocols for generating other cyclic peptides with desired properties.
Structure-activity relationship (SAR) analysis: The unique stereochemistry and conformational features of Cyclo(D-Leu-L-Pro) are leveraged in SAR studies to assess how cyclization and residue configuration affect biological and physicochemical properties. By comparing its activity and behavior to those of related dipeptides or analogs, scientists gain a deeper understanding of the structural determinants that govern function, which is critical for rational peptide design and the development of novel bioactive compounds.
Analytical method validation: As a structurally defined cyclic dipeptide, Cyclo(D-Leu-L-Pro) is frequently used as a standard in chromatographic and spectroscopic method development. Its consistent retention characteristics and spectral signatures enable validation and calibration of analytical techniques such as HPLC, LC-MS, and NMR. This role is essential for ensuring the reliability and reproducibility of analytical workflows in peptide research, quality control, and compound characterization.
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