Fmoc-Leu-Leu-OH pairs two hydrophobic residues under an N-terminal protecting group, enabling studies of packing effects and backbone orientation. The motif contributes to strong hydrophobic clustering in assembled peptides. Researchers employ it for optimizing resin-bound elongation. Applications span structural modeling, sequence design, and hydrophobic-core engineering.
CAT No: R2530
CAS No:88743-98-0
Synonyms/Alias:Fmoc-leu-leu-OH;88743-98-0;L-Leucine, N-[N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-leucyl]-;(S)-2-((S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-methylpentanamido)-4-methylpentanoic acid;(2S)-2-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanamido]-4-methylpentanoic acid;(2S)-2-[[(2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-methylpentanoyl]amino]-4-methylpentanoic acid;N-[(9H-Fluoren-9-ylmethoxy)carbonyl]-L-leucyl-L-leucine;N-Fmoc-L-leucyl-L-leucine;Fmoc-Leu-Leu;MFCD01632054;Fmoc-L-Leu-L-Leu-OH;E97UXQ96C2;N-(N-Fmoc-L-leucyl)-L-leucine;CS-0129143;EN300-1521370;L-Leucine, N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-leucyl-;(2S)-2-[(2S)-2-{[(9H-FLUOREN-9-YLMETHOXY)CARBONYL]AMINO}-4-METHYLPENTANAMIDO]-4-METHYLPENTANOIC ACID;(S)-2-((S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-methylpentanamido)-4-methylpentanoicacid;
Fmoc-leu-leu-OH is a synthetic dipeptide derivative featuring an N-terminal 9-fluorenylmethyloxycarbonyl (Fmoc) protecting group and two consecutive leucine residues. As a protected peptide fragment, it serves as a valuable building block in solid-phase peptide synthesis (SPPS) and related methodologies. The sequence's hydrophobic character, conferred by the leucine side chains, makes it particularly relevant for studies involving protein-protein interactions, membrane-active peptides, and the engineering of hydrophobic domains in custom peptide constructs. Its compatibility with standard Fmoc-based protocols and its defined structure support precise incorporation into larger peptide sequences, facilitating research in biochemistry, structural biology, and materials science.
Peptide Synthesis: Fmoc-leu-leu-OH is primarily employed as a dipeptide building block in Fmoc-based solid-phase peptide synthesis. Its use allows researchers to introduce the Leu-Leu motif efficiently into growing peptide chains, which is especially beneficial when synthesizing sequences rich in hydrophobic residues or repetitive leucine stretches. The pre-assembled dipeptide format can improve overall synthetic efficiency, reduce racemization risk, and minimize side reactions compared to stepwise single-residue coupling. This capability is particularly valuable for the rapid assembly of complex peptides, peptidomimetics, or combinatorial peptide libraries.
Hydrophobic Domain Engineering: The compound's consecutive leucine residues provide a defined hydrophobic segment that is instrumental in designing peptides with membrane-associating properties or in mimicking transmembrane regions. Researchers utilize such dipeptide fragments to study the role of hydrophobic interactions in protein folding, stability, and aggregation. By incorporating the Leu-Leu motif into synthetic peptides, it becomes possible to systematically investigate sequence-structure relationships and the behavior of hydrophobic clusters in various biochemical environments.
Protein-Protein Interaction Studies: The presence of adjacent leucine residues is a common feature in many protein-protein interaction motifs, such as leucine zippers and coiled-coil domains. Fmoc-leu-leu-OH enables the modular synthesis of peptides that model these biologically significant motifs, supporting investigations into the mechanisms of molecular recognition, dimerization, and oligomerization. Such model peptides are essential for probing the determinants of specificity and affinity in protein complexes, as well as for developing synthetic analogs with tailored interaction properties.
Peptide-Based Material Development: The hydrophobicity and structural features of the Leu-Leu sequence make this dipeptide derivative suitable for the design of peptide-based materials, including self-assembling nanostructures, hydrogels, and biomimetic surfaces. Researchers exploit its propensity to promote aggregation or ordered assembly when included in longer peptide sequences, enabling the creation of functional materials with customizable mechanical and chemical properties. Such materials have applications in biosensing, biointerfaces, and the development of novel biomaterials for research and industrial purposes.
Analytical Method Development: The well-defined structure and physicochemical properties of Fmoc-leu-leu-OH make it a useful standard or reference compound in analytical method development for peptide analysis. Laboratories utilize it to calibrate or validate chromatographic, spectrometric, or electrophoretic methods designed for peptide identification, purity assessment, or sequence confirmation. Its predictable retention and detection characteristics facilitate method optimization and quality control in peptide research and production workflows.
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