H-Tyr-AMC

H-Tyr-AMC is a tyrosine-derived amide conjugate in which the L-tyrosine amino acid backbone is linked through a primary amide to 7-amino-4-methylcoumarin (AMC), forming a fluorogenic substrate scaffold with a stereochemically defined aromatic amino acid component. The molecule contains a phenolic hydroxyl on the tyrosine side chain, an amide linkage that stabilizes the conjugation, and a coumarin chromophore that enables sensitive optical readout upon enzymatic or chemical transformation. The N-terminal free amine (H-) and the tyrosine phenol provide functional handles for derivatization, while the coumarin system participates in fluorescence-based detection and analytical quantification. As a compact amino acid-reporter conjugate, H-Tyr-AMC functions as an intermediate and assay reagent in peptide chemistry and biochemical research where controlled tyrosine recognition and measurable signal generation are required.

1. Enzyme Activity Assays

H-Tyr-AMC is used in enzyme activity screening and mechanistic studies in chemical biology and biochemistry, where tyrosine-directed substrate recognition can be monitored through the coumarin reporter. The tyrosine-derived aromatic side chain and the phenolic hydroxyl group mimic key features of Tyr-containing peptide motifs, while the AMC fluorophore enables readout of substrate cleavage or conversion events. The amide linkage between the amino acid and AMC supports stable substrate presentation under assay-relevant conditions and can be paired with peptide-coupling logic for designing related fluorogenic analogs. Downstream workflows frequently include generating structure-activity relationship (SAR) series by modifying the phenol, changing the amino acid context, or altering the reporter to tune sensitivity and kinetic behavior. H-Tyr-AMC therefore serves as an amino acid-reporter conjugate platform for studying substrate specificity, inhibitor effects, and reaction pathway selectivity.

2. Peptide Coupling Substrate

H-Tyr-AMC is applied in synthetic organic chemistry and peptide chemistry as a reporter-bearing amino acid derivative that can be incorporated into coupling strategies for constructing Tyr-containing peptide analogs. The presence of the tyrosine amino acid functionality and the amide bond to AMC provides a defined connection point for assembling conjugates where the coumarin moiety acts as a detectable tag. The phenolic hydroxyl can be protected or selectively functionalized to control chemoselectivity during peptide coupling, enabling orthogonal protection schemes that separate side-chain modification from backbone assembly. The resulting Tyr-AMC-containing constructs can be used to generate assay-ready peptide substrates, mapping reagents, and mechanistic probes for proteases or processing enzymes. H-Tyr-AMC thus supports downstream derivative formation where peptide coupling chemistry and fluorogenic detection are integrated into a single molecular scaffold.

3. Bioconjugation Probes

H-Tyr-AMC is suitable for chemical biology and biomolecule labeling workflows that require a tyrosine-based recognition element coupled to a fluorescent reporter. The tyrosine phenolic hydroxyl and the amide-linked AMC chromophore enable conjugation designs that preserve aromatic recognition while maintaining optical detectability. The free N-terminal amine (H-) can be used as a reactive handle for coupling to activated esters, isothiocyanates, or other electrophiles in bioconjugation schemes, while the coumarin core provides a built-in signal for tracking conjugate formation. The resulting labeled reagents can be used in binding studies, substrate mapping, and analytical tracking of biomolecular transformations where Tyr-mediated interactions are relevant. H-Tyr-AMC therefore functions as a chiral amino acid-reporter building block for generating fluorescent conjugation products and analytical probes.

4. Analytical Research Standards

H-Tyr-AMC is employed in analytical research as a fluorescence-based standard and calibration component for quantifying enzyme-catalyzed transformations and reporter release. The coumarin chromophore provides a measurable optical signature, while the tyrosine-derived structural motif helps ensure that analytical signals correspond to Tyr-specific reaction pathways rather than nonspecific background fluorescence. The amide-linked conjugation stabilizes the reporter under measurement conditions, supporting reproducible signal generation across method development and comparative studies. Downstream use often includes preparing related standards by side-chain derivatization, reporter substitution, or creating analogs with altered amino acid context to validate assay selectivity. H-Tyr-AMC thus supports method development in amino acid derivatization, peptide substrate evaluation, and fluorescence readout calibration in biochemical research.

5. Protected Amino Acid Derivatization

H-Tyr-AMC is relevant to protected amino acid chemistry and side-chain functionalization strategies because its tyrosine phenolic hydroxyl and amino acid-derived amide can be manipulated to control chemoselectivity. The phenol can be protected or converted to activated derivatives to enable orthogonal transformations, while the AMC-linked amide maintains a stable reporter connection during intermediate synthesis. The N-terminal amine functionality allows incorporation into protected amino acid intermediate sequences where selective deprotection and re-coupling are required to build Tyr-containing libraries. Downstream, derivatives prepared from H-Tyr-AMC can serve as intermediates for peptidomimetic construction, fluorogenic substrate series, and process chemistry intermediate preparation where controlled functional group handling is necessary. H-Tyr-AMC therefore aligns with amino acid derivatization workflows that combine protecting-group logic with fluorescence-compatible reporter chemistry.

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