H-Phe-AMC

H-Phe-AMC is an anilide-linked phenylalanine derivative bearing an aminomethyl coumarin (AMC) fluorophore, where the N-terminus is protected as an H- (free amino) motif and the AMC group provides a strong signal upon enzymatic cleavage or chemical release. The molecule contains a stereochemically defined phenylalanine backbone with a benzylic stereocenter, a hydrophobic phenyl side chain that supports substrate recognition, and an amide linkage that can participate in peptide-like coupling chemistry. The coumarin fluorophore enables sensitive detection through fluorescence turn-on behavior, while the amide and aromatic functionalities provide controlled reactivity under standard peptide synthesis conditions. As a research-grade biochemical probe and peptide-analog intermediate, H-Phe-AMC can be incorporated into substrate design workflows and downstream synthetic sequences that require a chiral amino acid handle paired with a cleavable reporter group.

1. Enzyme Substrate Assays

H-Phe-AMC is used in enzymology and chemical biology for fluorescence-based substrate assays targeting proteases and peptidases, where the AMC reporter generates a measurable signal after cleavage of the phenylalanine-AMC linkage. The phenylalanine portion provides a side-chain pattern that can mimic substrate recognition elements, while the amide bond geometry supports enzyme-dependent hydrolysis. The coumarin fluorophore is positioned to enable turn-on readouts, making the compound suitable for kinetic studies, inhibitor screening panels, and orthogonal assay development. Downstream synthetic utility includes using the same AMC reporter strategy to prepare related amino acid AMC substrates for mapping specificity across enzyme families.

2. Protease Inhibitor Screening

H-Phe-AMC supports drug discovery chemistry workflows focused on protease inhibitor characterization using fluorescence readouts that correlate with residual enzymatic activity. The compound's chiral phenylalanine residue and hydrophobic side chain can be applied to design substrate-mimetic screening formats that probe S1/S1' pocket preferences without requiring full-length peptide substrates. The N- and C-functional motifs enable assay-compatible handling and can be adapted into series of analogs by varying the amino acid identity while retaining the AMC reporter. The resulting derivatives can serve as structure-activity relationship (SAR) tools for optimizing inhibitor binding modes through substrate specificity profiling.

3. Peptidomimetic Probe Synthesis

H-Phe-AMC is suitable for peptidomimetic construction and chemical probe synthesis because it combines an amino acid scaffold with a cleavable fluorescent tag. The phenylalanine amide linkage provides a peptide-like connection point for assembling longer reporter-bearing constructs or for generating analogs that incorporate alternative protecting-group strategies during synthesis. The AMC moiety functions as a built-in detection handle, enabling downstream formation of probe libraries where cleavage yields a quantifiable fluorophore. Applied use extends to generating mechanistic probes for protease activity in biochemical research and for validating cleavage sites in peptide-analog studies.

4. Side-Chain Functionalization Studies

H-Phe-AMC can be employed in amino acid derivatization research where the phenylalanine side chain is used as a platform for exploring how hydrophobic aromatic substitutions affect recognition and cleavage. The stereogenic center in the phenylalanine backbone enables stereochemical comparisons when preparing epimeric or analog series, supporting studies of stereochemical requirements for peptide coupling-like recognition events. The amide and aromatic coumarin functionalities can be leveraged for controlled chemical transformations that preserve the reporter while modifying the substrate-binding region. The resulting functionalized derivatives can feed into synthetic methodology development for chiral amino acid intermediate preparation and for reporter-tagged substrate design.

5. Analytical Fluorescence Standards

H-Phe-AMC is used in analytical research as a fluorescence-active reference material for method development, signal calibration, and assay validation in coumarin-based detection systems. The AMC fluorophore provides a defined optical response that can support normalization across experimental runs, while the phenylalanine-amide structure provides a chemically consistent cleavage target for assay benchmarking. The compound's defined chiral amino acid framework makes it suitable for comparative analytical studies when evaluating specificity of cleavage under different conditions. Downstream utility includes preparing related AMC standards and constructing calibration sets for multiplexed fluorescence assays in biochemical and industrial process monitoring contexts.

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

2. An interdomain binding site on HIV-1 Nef interacts with PACS-1 and PACS-2 on endosomes to down-regulate MHC-I

3. Emerging applications of nanotechnology for diagnosis and therapy of disease: a review

4. Immune responses to homocitrulline-and citrulline-containing peptides in rheumatoid arthritis

5. Adipose tissue is a key organ for the beneficial effects of GLP-2 metabolic function