H-Lys(Z)-AMC · HCl

H-Lys(Z)-AMC · HCl is a protected lysine derivative bearing a benzyloxycarbonyl (Z) group on the ε-amino side chain and an AMC (7-amino-4-methylcoumarin) fluorogenic leaving group attached through an amide linkage at the C-terminus. The compound is present as a hydrochloride salt, which increases handling stability by protonating the basic lysine-derived functionality while leaving the Z-protected ε-amine unavailable for undesired coupling. The stereochemical outcome is tied to the lysine backbone, providing a defined chiral amino acid framework compatible with peptide chemistry workflows. The Z carbamate and the coumarin fluorophore together create a reactivity profile suited to selective deprotection, controlled acylation, and downstream conversion into lysine-based peptide building blocks or analytical substrates.

1. Protease Substrate Assays

H-Lys(Z)-AMC · HCl is used in chemical biology and enzymology workflows as a fluorogenic substrate format where the AMC group enables sensitive monitoring of amide bond cleavage events. The lysine side chain architecture, combined with Z protection on the ε-amine, helps maintain a defined recognition element and reduces competing reactions during assay setup. The hydrochloride salt form supports reproducible solubility and protonation state control, which can be relevant for enzyme-active-site interactions. The resulting AMC release can be applied to characterize protease specificity, screen inhibitor panels, and generate mechanistic readouts that connect lysine-directed substrate recognition to measurable fluorescence changes.

2. Protected Lysine Building Blocks

H-Lys(Z)-AMC · HCl functions as a lysine-derived intermediate for protected amino acid synthesis and peptide building block preparation, leveraging the Z carbamate as a removable protecting group for the ε-amino moiety. The protected ε-amine enables selective peptide coupling at the desired position while preventing side-chain crosslinking or oligomerization during fragment assembly. The AMC amide serves as a handle for constructing or testing C-terminal lysine motifs, and subsequent transformations can convert the coumarin-bearing amide into alternative acylated derivatives as synthetic needs evolve. Lysine stereochemistry and the orthogonal protection pattern support compatibility with stepwise peptide construction strategies and downstream derivatization into lysine-containing analogs.

3. Peptidomimetic And SAR Studies

H-Lys(Z)-AMC · HCl can be applied in peptidomimetic construction and structure-activity relationship studies where lysine side-chain geometry and controlled functional group availability are required for scaffold diversification. The Z-protected ε-amino group allows staged side-chain modifications after selective deprotection, enabling access to ε-acylated, ε-alkylated, or conjugatable lysine analogs without disturbing the AMC-linked C-terminal motif. The coumarin fluorophore can also be used as a reporter tag in molecular design iterations that compare binding or processing behavior across closely related structures. The compound thereby supports medicinal chemistry-adjacent optimization of lysine-containing pharmacophores and analytical traceability of candidate analogs.

4. Bioconjugation Tagging

H-Lys(Z)-AMC · HCl is suitable for bioconjugation chemistry workflows that require an amide-linked fluorescent handle while maintaining selective protection of the lysine ε-amino functionality. The Z group provides a controlled protection strategy so that conjugation can be directed to the intended reactive site after deprotection, minimizing heterogeneous labeling from unprotected amines. The hydrochloride salt form can help manage protonation during coupling steps, which is relevant when targeting amide formation or carbamate-directed transformations under controlled conditions. The AMC-containing lysine motif can be used to generate labeled peptide fragments, tagging reagents, or analytical standards that track biomolecular processing and localization in biochemical research.

5. Process Chemistry Intermediate

H-Lys(Z)-AMC · HCl can serve as a defined intermediate in fine chemical synthesis and process chemistry for manufacturing lysine-based fluorogenic reagents and peptide-scaffold precursors. The Z carbamate provides a robust protecting-group strategy that can be carried through coupling and purification operations, supporting reproducible downstream deprotection and conversion to other lysine derivatives. The coumarin AMC moiety offers a stable reporting functionality that can be incorporated into batch-manufactured assay reagents or used as a reference material for quality control of substrate analogs. The salt form helps with handling and formulation considerations tied to basic amino acid derivatives, aligning with industrial intermediate preparation practices for amino acid chemistry and peptide-related production.

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