N-Acetyl-Leucyl-Leucine carries two hydrophobic leucine residues under an N-acetyl cap, forming a stable dipeptide for folding and solubility studies. The sequence models hydrophobic clustering and steric packing. Researchers evaluate its behavior in varied solvent systems. Applications include peptide-assembly modeling, proteolysis research, and structural-biochemistry analysis.
CAT No: R2549
CAS No:24125-26-6
Synonyms/Alias:N-Acetyl-leucyl-leucine;C11333;2-[(2-acetamido-4-methyl-pentanoyl)amino]-4-methyl-pentanoic acid;Acetyl-L-leucyl-L-leucine;AC1L9E2N;2-((2-acetamido-4-methyl-pentanoyl)amino)-4-methyl-pentanoic acid;24125-26-6;CHEBI:7193;SCHEMBL5551895;Q27107453;
N-Acetyl-leucyl-leucine is a synthetic dipeptide composed of two leucine residues, with an acetyl group capping the N-terminus. As a peptide compound, it serves as a valuable tool in the study of peptide structure, function, and metabolism. Its defined sequence and chemical stability make it relevant for biochemical investigations into peptide transport, enzymatic hydrolysis, and protein interaction dynamics. The compound is frequently utilized in research settings that require precise control over peptide composition and modification, offering insight into the behavior of short-chain peptides in various biological and chemical environments.
Peptide transport studies: N-Acetyl-leucyl-leucine is commonly employed to investigate mechanisms of peptide uptake and transport across biological membranes. Its dipeptide structure, combined with N-terminal acetylation, allows researchers to probe the specificity and efficiency of peptide transporters such as PEPT1 and PEPT2. By monitoring the cellular uptake and distribution of this compound, scientists gain a deeper understanding of transporter-mediated absorption, which is essential for elucidating nutrient assimilation and drug delivery processes in model systems.
Enzyme substrate analysis: The compound serves as a model substrate in studies of peptidase and protease activity. The acetylated dipeptide is resistant to some exopeptidases, making it useful for dissecting the substrate specificity and catalytic mechanisms of various endopeptidases. Using N-Acetyl-leucyl-leucine, researchers can assess how modifications at the peptide termini influence enzyme recognition and cleavage, thereby advancing knowledge of protein turnover and degradation pathways.
Peptide synthesis validation: In the context of synthetic chemistry, this dipeptide is often utilized as a reference standard or intermediate in solid-phase peptide synthesis (SPPS) protocols. Its defined sequence and stability enable chemists to optimize coupling conditions, evaluate resin performance, and troubleshoot synthesis workflows. The compound's use in method development ensures reproducibility and accuracy in the assembly of more complex peptides and peptide-based biomolecules.
Structural and conformational studies: The well-characterized nature of N-Acetyl-leucyl-leucine makes it an ideal model for investigating peptide secondary structure and conformational preferences. Techniques such as nuclear magnetic resonance (NMR) spectroscopy, circular dichroism (CD), and X-ray crystallography can be applied to this dipeptide to explore how acetylation and sequence context influence folding and molecular interactions. Insights gained from such studies inform the broader understanding of peptide and protein structure-function relationships.
Analytical method development: The compound is valuable in the validation and calibration of analytical techniques used for peptide detection and quantification, including high-performance liquid chromatography (HPLC) and mass spectrometry (MS). Its predictable chromatographic and mass spectral properties make it a reliable standard for optimizing separation parameters, establishing detection limits, and ensuring quality control in peptide analysis workflows. This utility supports both research and industrial laboratories in achieving accurate, reproducible analytical results.
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