Ser-Leu integrates a polar serine with hydrophobic leucine, producing an amphipathic system for examining hydrogen bonding and solvent interactions. The dipeptide supports modeling of secondary-structure initiation. Researchers evaluate its behavior in enzymatic recognition studies. Applications span peptide assembly research, motif analysis, and conformational profiling.
CAT No: R2663
CAS No:6665-16-3
Synonyms/Alias:Ser-Leu;H-Ser-Leu-OH;6665-16-3;seryl-leucine;L-seryl-L-leucine;serylleucine;Serinylleucine;SL dipeptide;S-L Dipeptide;CHEBI:74815;Serine Leucine dipeptide;Serine-Leucine dipeptide;(2S)-2-[[(2S)-2-amino-3-hydroxypropanoyl]amino]-4-methylpentanoic acid;L-Leucine, L-seryl-;DTXSID60875837;N-Serylleucine;Serinyl-Leucine;(2S)-2-(((2S)-2-amino-3-hydroxypropanoyl)amino)-4-methylpentanoic acid;(2S)-2-(((2S)-2-azaniumyl-3-hydroxypropanoyl)amino)-4-methylpentanoate;(2S)-2-[[(2S)-2-azaniumyl-3-hydroxypropanoyl]amino]-4-methylpentanoate;MFCD00055934;L-Ser-L-Leu;L-Serinyl-L-Leucine;N-L-Seryl-L-leucine;CHEMBL52406;SCHEMBL3777970;DTXCID901013954;SL;DA-74289;FS108174;Q27144925;
Ser-Leu, also known as Serine-Leucine, is a synthetic dipeptide composed of the amino acids serine and leucine linked by a peptide bond. As a member of the peptide compound category, it serves as a valuable tool in biochemical research, particularly in studies exploring peptide structure, sequence specificity, and protein interaction motifs. The presence of both a polar hydroxyl-containing side chain (serine) and a hydrophobic aliphatic side chain (leucine) imparts unique physicochemical properties to this dipeptide, making it an informative model for investigations into peptide folding, recognition, and function. Its defined sequence and manageable size allow for precise manipulation in experimental systems, supporting a range of scientific inquiries across molecular biology, biochemistry, and analytical chemistry.
Peptide synthesis validation: Ser-Leu is frequently utilized as a reference standard or intermediate in solid-phase peptide synthesis (SPPS) and solution-phase synthesis protocols. Its straightforward structure and well-characterized linkage make it ideal for optimizing coupling efficiency, deprotection strategies, and purification methods. Researchers employ this dipeptide to evaluate resin performance, test new coupling reagents, or benchmark chromatographic techniques, thereby refining synthetic workflows and ensuring reproducible peptide production.
Protease substrate specificity studies: The Ser-Leu sequence is recognized as a relevant motif in the context of protease activity assays, particularly for serine and cysteine proteases. By incorporating this dipeptide into substrate panels or using it as a standalone substrate, investigators can assess enzyme cleavage preferences, kinetic parameters, and inhibition profiles. Such studies contribute to a deeper understanding of proteolytic mechanisms and inform the design of selective inhibitors or activity-based probes.
Peptide structure-function analysis: Due to the contrasting side chain properties of serine and leucine, Ser-Leu serves as a model system for examining the influence of sequence composition on local secondary structure formation and peptide conformational dynamics. Researchers leverage its defined dipeptide structure in spectroscopic and computational studies to elucidate hydrogen bonding patterns, backbone flexibility, and hydrophobic interactions. Insights gained from these analyses aid in predicting the behavior of larger peptides and proteins.
Analytical method development: The dipeptide is commonly employed as a standard in chromatographic and mass spectrometric method development. Its distinct retention characteristics and ionization behavior make it suitable for calibrating instruments, validating peptide detection protocols, and establishing limits of quantification. Analytical chemists use Ser-Leu to optimize separation conditions and ensure accurate identification of peptides in complex biological samples.
Biochemical pathway elucidation: In metabolic and enzymatic pathway studies, Ser-Leu can be used to probe the activity of dipeptidases and peptide transporters. By tracking its uptake, hydrolysis, or modification in cellular or subcellular systems, scientists can characterize substrate specificity and transport kinetics of relevant enzymes and membrane proteins. Such investigations are instrumental in mapping peptide metabolism and understanding nutrient processing at the molecular level.
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