Thr-Leu pairs polar threonine with hydrophobic leucine to model early-stage folding behaviors. The dipeptide enables detailed examination of hydrogen bonding and amphipathic tendencies. Researchers explore its solution dynamics and enzymatic recognition patterns. Applications include structural modeling, motif analysis, and peptide-synthesis refinement.
CAT No: R2664
CAS No:50299-12-2
Synonyms/Alias:H-Thr-Leu-OH;Thr-Leu;50299-12-2;L-threonyl-L-leucine;threonylleucine;CHEBI:74860;(2S)-2-[[(2S,3R)-2-amino-3-hydroxybutanoyl]amino]-4-methylpentanoic acid;(S)-2-((2S,3R)-2-Amino-3-hydroxybutanamido)-4-methylpentanoic acid;Threoninylleucine;Threonyl-leucine;TL dipeptide;T-L Dipeptide;Threoninyl-Leucine;H-Thr-Leu;MFCD00083825;L-Thr-L-Leu;L-Threoninyl-L-Leucine;Threonine Leucine dipeptide;Threonine-Leucine dipeptide;CHEMBL1221899;SCHEMBL14842720;BQBCIBCLXBKYHW-CSMHCCOUSA-N;AS-82914;FT108186;CS-0453119;G77914;Q27144970;(2S)-2-[(2S,3R)-2-AMINO-3-HYDROXYBUTANAMIDO]-4-METHYLPENTANOIC ACID;
Thr-Leu, also known as Threonylleucine, is a synthetic dipeptide composed of the amino acids threonine and leucine joined via a peptide bond. As a representative member of the dipeptide class, it serves as a valuable research tool in the study of peptide structure, function, and metabolism. The combination of a polar, hydroxyl-containing threonine residue with a hydrophobic leucine residue gives this molecule unique physicochemical properties, making it of interest in various biochemical, enzymological, and analytical contexts. Thr-Leu is widely utilized in research settings to probe peptide transport mechanisms, investigate proteolytic specificity, and support the development of peptide-based analytical methodologies.
Peptide transport studies: In biochemical and cell biology research, Thr-Leu is often employed as a model substrate to investigate the mechanisms of peptide uptake and transport across cellular membranes. Its defined structure allows researchers to assess the activity and specificity of peptide transporters, such as those in the solute carrier (SLC) family, under controlled experimental conditions. By tracking the cellular uptake or translocation of this dipeptide, scientists can elucidate transporter kinetics, substrate preferences, and the impact of structural modifications on transport efficiency.
Enzyme substrate characterization: The dipeptide is frequently used in enzymology to study the substrate specificity and catalytic mechanisms of various proteases and peptidases. Its sequence, featuring both a hydroxylated side chain and a branched aliphatic residue, provides an informative probe for mapping enzyme active sites and determining cleavage preferences. Incorporating Thr-Leu into enzyme assays enables the identification of novel proteolytic activities, helps differentiate between exopeptidase and endopeptidase action, and supports the screening of enzyme inhibitors in a controlled, defined substrate context.
Peptide synthesis optimization: As a standard dipeptide, Thr-Leu is valuable in the optimization and validation of peptide synthesis protocols. Its use allows synthetic chemists to assess coupling efficiency, monitor racemization, and evaluate the impact of protecting group strategies on peptide bond formation. By serving as a reference compound, it aids in troubleshooting synthetic bottlenecks and benchmarking the performance of new reagents or methodologies in solid-phase or solution-phase peptide assembly.
Analytical method development: In the field of analytical chemistry, Thr-Leu is utilized as a calibration standard and test analyte for the development and validation of chromatographic and mass spectrometric methods targeting small peptides. Its defined mass, polarity, and retention characteristics make it suitable for optimizing detection parameters, evaluating instrument sensitivity, and establishing quantitative protocols for peptide analysis in complex biological samples.
Peptidomimetic and structure-activity relationship (SAR) studies: The unique side chain combination present in Thr-Leu renders it a useful scaffold for designing and evaluating peptidomimetics and conducting SAR investigations. Researchers employ this dipeptide to explore the influence of side chain polarity and hydrophobicity on molecular recognition, binding affinity, and biological activity in model systems. These studies contribute to a deeper understanding of peptide-protein interactions and inform the rational design of novel bioactive molecules for research applications.
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