Glutaryl-Phe-AMC

Glutaryl-Phe-AMC is a glutaryl-activated phenylalanine amide linked to 7-amino-4-methylcoumarin (AMC), forming a fluorogenic peptide substrate analog with a defined acyl spacer and a chiral amino acid stereocenter at the phenylalanine residue. The molecule contains an AMC fluorophore that can be released upon amide bond cleavage, while the glutaryl group provides a negatively biased, carbonyl-rich acyl motif that can influence enzyme recognition and binding orientation. The phenylalanine side chain contributes hydrophobic/aromatic interactions, and the amide linkage constrains conformational freedom in ways that are relevant for peptide coupling chemistry and substrate mimic design. As a research-grade biochemical intermediate, Glutaryl-Phe-AMC is chemically stable under typical handling for fluorogenic assays and can be used to generate downstream peptide and amide derivatives through acyl transfer, coupling, or analytical derivatization strategies.

1. Protease Activity Assays

Glutaryl-Phe-AMC is applied in biochemical research workflows focused on protease activity screening and kinetic characterization, where the glutaryl-phenylalanine amide architecture serves as a substrate recognition element. The AMC fluorophore is positioned to undergo fluorescence increase upon enzymatic cleavage that liberates the coumarin leaving group, enabling sensitive monitoring of proteolysis without requiring additional labeling steps. The glutaryl carbonyl array and the phenylalanine side chain can support selective binding to protease active sites that accommodate acidic acyl motifs and hydrophobic residues. The resulting fluorescence readout can be used to compare substrate specificity across enzyme variants and to support structure-activity relationship studies for inhibitor or substrate analog design in peptide chemistry.

2. Enzyme Inhibitor Screening

Glutaryl-Phe-AMC functions as a tool substrate in drug discovery and chemical biology programs that evaluate small-molecule or peptide-based inhibitors targeting protease families. The defined acyl spacer (glutaryl) and the stereochemically defined Phe residue provide a structured binding pattern that can be competed by inhibitor candidates, making the substrate useful for translating binding interactions into measurable changes in AMC release. The amide linkage and coumarin leaving group enable assay-compatible readouts that reflect how candidate molecules affect catalytic turnover rather than non-specific fluorescence artifacts. Downstream, inhibitor hits can be carried into medicinal chemistry as structure-guided leads, with Glutaryl-Phe-AMC supporting iterative synthesis of analogs that vary acyl length, aromatic side-chain character, or leaving-group geometry.

3. Peptidomimetic SAR Studies

Glutaryl-Phe-AMC is suitable for peptidomimetic construction and SAR studies where the glutaryl-Phe-AMC scaffold acts as a model for acyl recognition and residue-dependent cleavage. The compound's functional groups, including the terminal coumarin amide and the glutaryl carbonyls, enable systematic modification of spacing, electronic character, and steric presentation while maintaining a fluorogenic readout handle. The phenylalanine side chain can be replaced or diversified in derivative synthesis to probe how aromatic hydrophobicity and stereochemical configuration affect enzyme processing. The resulting analog series can guide selection of peptide-like backbones for further synthetic elaboration, including conversion into non-fluorogenic substrates, reference standards, or conjugatable intermediates for downstream biochemical investigations.

4. Analytical Fluorogenic Standards

Glutaryl-Phe-AMC can be employed in analytical research for developing and validating fluorogenic assay formats that require consistent substrate behavior and reproducible AMC release profiles. The coumarin fluorophore provides a built-in detection tag, while the glutaryl-phenylalanine amide framework supports controlled cleavage chemistry that can be monitored spectroscopically. The compound can serve as a reference material when comparing assay conditions such as buffer composition, co-solvent effects, or sample matrices that may influence amide hydrolysis or fluorescence background. Downstream use includes preparing calibration or control materials for method qualification in biochemical screening laboratories and supporting traceable workflows for protease specificity measurements.

5. Specialty Chemical Intermediate Use

Glutaryl-Phe-AMC is relevant to fine chemical synthesis and process chemistry intermediate preparation when a coumarin-containing amino acid derivative is needed as a modular building block. The molecule contains a reactive amide motif and a stable coumarin system that can be carried through derivatization steps to generate related AMC-based substrates, acylated amino acid derivatives, or coupling-ready intermediates for peptide chemistry. The glutaryl group can be used as an acylating handle in subsequent synthetic sequences, enabling controlled formation of analogs that vary chain length or acyl substitution patterns. Industrially, the compound's defined structure and fluorogenic readout make it a practical intermediate for producing assay reagents and substrate libraries used in industrial biocatalysis development and biochemical process monitoring.

6. Bioconjugation Research Probes

Glutaryl-Phe-AMC can be used in chemical biology for designing enzyme-responsive probes where the glutaryl-Phe recognition element is coupled to a fluorescent reporting group. The presence of the AMC moiety provides a direct fluorescence output, while the amide and carbonyl-rich glutaryl segment can participate in specific binding interactions that mimic peptide substrate recognition. The phenylalanine side chain contributes hydrophobic contact potential, which may be leveraged when constructing probe families with altered residue identity or spacer length to tune cleavage sensitivity. Downstream, derivative synthesis can extend toward conjugatable probe formats, including incorporation into larger molecular scaffolds for monitoring protease activity in complex reaction mixtures and for generating structure-defined reagents in applied amino acid and peptide science.

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