Z-Ala-ala-asn-amc

Z-Ala-ala-asn-amc is a synthetic peptide substrate widely utilized in biochemical research to investigate protease activity, particularly those enzymes that recognize and cleave specific oligopeptide sequences. Featuring a benzyloxycarbonyl (Z) protecting group at the N-terminus and a 7-amino-4-methylcoumarin (AMC) fluorogenic moiety at the C-terminus, this compound enables sensitive detection of enzymatic cleavage events. Its defined sequence, incorporating alanine and asparagine residues, is tailored to probe the substrate specificity of various proteolytic enzymes, making it a valuable tool in enzymology and molecular biology studies.

Enzyme Activity Assays: Z-Ala-ala-asn-amc is extensively employed as a fluorogenic substrate in enzyme activity assays, particularly for serine and cysteine proteases. Upon enzymatic cleavage at the amide bond adjacent to the AMC group, the non-fluorescent substrate releases free AMC, resulting in a marked increase in fluorescence. This allows for highly sensitive, real-time quantification of protease activity in complex biological samples or purified systems, facilitating kinetic studies and inhibitor screening.

Substrate Specificity Profiling: The tailored peptide sequence of Z-Ala-ala-asn-amc enables detailed investigation of protease substrate preferences. By monitoring the rate and extent of cleavage, researchers can elucidate the sequence selectivity of target enzymes, compare the activity of protease isoforms, and identify optimal substrate motifs for further biochemical characterization. Such specificity profiling is crucial for understanding enzyme function, guiding the design of selective inhibitors, and mapping proteolytic pathways.

High-Throughput Screening: The fluorogenic nature of this peptide substrate makes it highly amenable to high-throughput screening platforms. In drug discovery and biotechnology settings, it is routinely used in microplate-based assays to rapidly evaluate large compound libraries for potential protease inhibitors or modulators. The robust, quantifiable fluorescence signal enables automated data acquisition and analysis, streamlining the identification of active compounds with desired biochemical properties.

Protease Inhibitor Characterization: Z-Ala-ala-asn-amc serves as a reliable substrate for characterizing the potency and selectivity of novel protease inhibitors. By measuring changes in enzymatic cleavage rates in the presence of candidate molecules, researchers can determine inhibition kinetics, calculate IC50 values, and assess off-target effects. This application supports the rational development of enzyme-targeted research tools and enhances the understanding of inhibitor mechanisms.

Enzyme Kinetics and Mechanistic Studies: The precise structure and fluorogenic properties of this peptide facilitate detailed kinetic analyses of proteolytic enzymes. Researchers utilize it to determine key parameters such as Km and Vmax, investigate catalytic mechanisms, and evaluate the effects of mutations or environmental factors on enzyme function. Such data are essential for advancing fundamental knowledge in enzymology and supporting the development of innovative biochemical assays.

1. SERS spectrum of the peptide thymosin‐β4 obtained with Ag nanorod substrate

2. TMEM16F and dynamins control expansive plasma membrane reservoirs

3. Glucagonlike peptide 2 analogue teduglutide: stimulation of proliferation but reduction of differentiation in human Caco-2 intestinal epithelial cells

4. Identification, Localization in the Central Nervous System and Novel Myostimulatory Effect of Allatostatins in Tenebrio molitor Beetle

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