N-Fmoc-(S)-2-aminoheptanoic acid

N-Fmoc-(S)-2-aminoheptanoic acid is a synthetic amino acid derivative featuring a fluorenylmethyloxycarbonyl (Fmoc) protecting group on the α-amino function and a seven-carbon aliphatic side chain. As a non-proteinogenic, enantiomerically pure building block, it is widely recognized for its value in peptide chemistry and advanced organic synthesis. The compound's distinct structure, combining a hydrophobic heptanoic acid backbone with the Fmoc protecting group, enables precise manipulation during solid-phase peptide synthesis (SPPS) and supports the creation of tailor-made peptide sequences for fundamental and applied research. Its use is pivotal in expanding the diversity of peptide libraries, facilitating the study of structure-activity relationships, and enabling the design of novel biomolecular architectures.

Peptide Synthesis: N-Fmoc-(S)-2-aminoheptanoic acid is primarily employed as a key building block in solid-phase peptide synthesis. The Fmoc group provides temporary protection to the α-amino group, allowing for stepwise chain elongation and selective deprotection under mild basic conditions. Incorporation of this non-natural amino acid into peptide sequences introduces a hydrophobic, extended side chain, which can modulate peptide conformation, stability, and interaction properties. Its use is instrumental in designing peptides with altered physicochemical characteristics or enhanced resistance to enzymatic degradation, supporting both fundamental research and the development of functional peptides for biotechnological applications.

Peptidomimetic Design: The unique structural features of this compound make it valuable for the synthesis of peptidomimetics—molecules that mimic the structure and function of natural peptides while exhibiting improved pharmacokinetic or biophysical properties. By substituting canonical amino acids with N-Fmoc-(S)-2-aminoheptanoic acid, researchers can systematically probe the impact of side chain length and hydrophobicity on molecular recognition, receptor binding, and membrane permeability. This approach aids in the rational design of peptide analogs with tailored activity profiles, contributing to the advancement of chemical biology and drug discovery research.

Structure-Activity Relationship Studies: The inclusion of a non-proteinogenic, aliphatic amino acid such as this one in peptide sequences enables detailed investigation of structure-activity relationships (SAR). By varying the position and frequency of such residues, scientists can dissect the roles of side chain hydrophobicity, steric bulk, and conformational flexibility in modulating biological activity. These SAR studies are essential for optimizing peptide-based probes, inhibitors, or molecular tools, and for understanding the fundamental principles governing peptide-protein and peptide-membrane interactions.

Combinatorial Peptide Library Construction: N-Fmoc-(S)-2-aminoheptanoic acid is frequently incorporated into combinatorial peptide libraries to expand the diversity of accessible sequence space. Its presence increases the chemical heterogeneity of libraries, facilitating the discovery of novel peptide ligands, catalysts, or molecular scaffolds with desirable properties. By enabling the systematic exploration of non-canonical side chains, it supports high-throughput screening efforts in fields such as molecular recognition, enzyme inhibition, and biomaterials development.

Analytical Method Development: The compound also serves as a useful standard or reference material in analytical method development for peptide research. Its defined stereochemistry and unique side chain structure make it suitable for calibrating chromatographic systems, validating mass spectrometric detection, or benchmarking derivatization protocols. Employing such specialized amino acid derivatives assists researchers in ensuring accuracy, reproducibility, and sensitivity in peptide analysis workflows, ultimately enhancing the reliability of experimental results across diverse biochemical investigations.

1. Effect of Short-Term Desiccation, Recovery Time, and CAPA-PVK Neuropeptide on the Immune System of the Burying Beetle Nicrophorus vespilloides

2. The effect of sex on immune responses to a homocitrullinated peptide in the DR4-transgenic mouse model of Rheumatoid Arthritis

3. Proinsulin C-peptide and insulin: Limited pattern similarities of interest in inter-peptide interactions but no C-peptide effect on insulin and IGF-1 receptor signaling

4. Tachykinin-related peptides modulate immune-gene expression in the mealworm beetle Tenebrio molitor L

5. Myotropic activity and immunolocalization of selected neuropeptides of the burying beetle Nicrophorus vespilloides (Coleoptera: Silphidae)