H-beta-Ala-AMC · TFA

H-beta-Ala-AMC · TFA is an amino acid derivative in which beta-alanine is linked to an AMC fluorophore (7-amino-4-methylcoumarin) through an amide/amide-like connection and supplied as the trifluoroacetate (TFA) salt. The molecule contains a stereochemically defined beta-alanine backbone (typically treated as achiral at the beta position), a terminal amide functionality adjacent to the coumarin fluorophore, and a basic nitrogen that is protonated under TFA salt conditions. The AMC chromophore provides strong fluorescence upon enzymatic or chemical cleavage, while the TFA counterion supports handling as a stable, isolable solid and can be removed under standard deprotection conditions to regenerate the free amine. The overall structure behaves as a compact, labeled amino acid substrate analog that can be used to probe peptide-bond forming chemistry and downstream assay-ready derivatives in peptide science and applied analytical workflows.

1. Enzyme Assay Substrates

H-beta-Ala-AMC · TFA is used in enzyme activity screening and mechanistic studies where coumarin-based fluorogenic readouts are required for sensitive detection of cleavage events. The beta-alanine segment and the AMC-linked amide motif mimic a short peptide recognition element, enabling enzymes that process amino acid amides or peptide-like substrates to undergo substrate turnover that releases fluorescent AMC. The TFA salt form stabilizes the amine during storage and facilitates reproducible preparation of assay solutions, while the fluorophore provides direct signal generation without additional derivatization steps. Downstream use can include building a substrate panel for specificity mapping, comparing substrate analogs, and supporting inhibitor characterization in biochemical research.

2. Peptide Coupling Building Block

H-beta-Ala-AMC · TFA can be applied as a labeled amino acid intermediate for constructing peptide derivatives where the AMC-bearing amide participates in stepwise coupling strategies. The compound's amide-forming functionality and the presence of a protonatable nitrogen under TFA conditions allow it to be integrated into peptide synthesis workflows, including N-protection management and salt-to-free-base transitions prior to coupling. The coumarin fluorophore serves as a built-in tracer that can be retained through chain assembly to generate fluorescent peptide standards, allowing monitoring of coupling outcomes and downstream purification by fluorescence detection. The resulting labeled peptides and peptide fragments can be used for structure-activity relationship studies, binding assays, and analytical method development in peptide chemistry.

3. Analytical Fluorogenic Standards

H-beta-Ala-AMC · TFA is suitable for analytical research requiring fluorescent standards and calibration materials for quantifying enzymatic cleavage or reaction kinetics. The AMC moiety provides a well-defined optical reporter, and the beta-alanine-linked scaffold yields a reproducible small-molecule reference that can be used to validate assay linearity, instrument response, and sample handling consistency. The trifluoroacetate salt form improves weighability and solubility behavior for routine preparation of standards, while the underlying amide linkage defines the chemical identity of the substrate analog. Downstream applications include LC/fluorescence method development, verification of peptide hydrolysis products, and generation of reference materials for biochemical assay normalization.

4. Chemical Biology Probes

H-beta-Ala-AMC · TFA can function as a chemical biology probe to interrogate substrate recognition and processing by proteases, amidases, and related enzymes that accept short amino acid amide motifs. The beta-alanine residue provides the minimal amino acid context, while the AMC fluorophore enables real-time or endpoint readouts that correlate with cleavage at the labeled bond. The TFA salt can be leveraged to control protonation state during probe preparation, supporting consistent interaction conditions with enzyme active sites and reducing variability from free-base handling. Downstream derivative formation may include coupling the labeled fragment into larger peptide-mimetic constructs for mechanistic mapping, specificity profiling, and comparative studies of substrate analog libraries.

5. Process Chemistry Intermediate

H-beta-Ala-AMC · TFA is relevant to process chemistry and specialty chemical production as a stable, isolable fluorogenic amino acid derivative that can be manufactured and supplied as a defined salt form. The presence of the TFA counterion supports predictable physical handling and can be removed when free amine functionality is required for further derivatization, enabling a controlled transition between protected/handled and reactive forms. The AMC-labeled scaffold is compatible with downstream transformations that generate peptide-building-block derivatives, including conversion into additional amide-linked intermediates for manufacturing of labeled reagents. Broader relevance extends to industrial intermediate preparation for biochemical assay components, where consistent structure and reliable optical reporting are central to scale-up reproducibility in fine chemical synthesis.

1. C-peptide and its C-terminal fragments improve erythrocyte deformability in type 1 diabetes patients

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

3. Zeta-potential-changing nanoparticles conjugated with cell-penetrating peptides for enhanced transfection efficiency

4. An Open-label, Single-center, Safety and Efficacy Study of Eyelash Polygrowth Factor Serum

5. Effect of Probiotic Lactobacillus plantarum on Streptococcus mutans and Candida albicans Clinical Isolates from Children with Early Childhood Caries