N-Succinyl-Ala-Ala-Phe-7-amido-4-methylcoumarin links a protected peptide substrate to a fluorogenic reporter for monitoring enzymatic cleavage. Phenylalanine enhances hydrophobic recognition and substrate affinity. Researchers assess kinetic performance in fluorescence-based assays. Applications include protease profiling, substrate development, and mechanistic enzyme analysis.
CAT No: R2474
CAS No:71973-79-0
Synonyms/Alias:N-Succinyl-Ala-Ala-Phe-7-amido-4-methylcoumarin;71973-79-0;4-[[1-[[1-[[1-[(4-methyl-2-oxochromen-7-yl)amino]-1-oxo-3-phenylpropan-2-yl]amino]-1-oxopropan-2-yl]amino]-1-oxopropan-2-yl]amino]-4-oxobutanoic acid;DTXSID90390826;DTXCID00341687;DA-78073;N-Succinyl-Ala-Ala-Phe-7-amido-4-methylcoumarin, protease substrate;635-336-2;
N-Succinyl-Ala-Ala-Phe-7-amido-4-methylcoumarin is a synthetic peptide substrate widely employed in enzymology and biochemical research, particularly in the investigation of protease activity. Structurally, it combines a tripeptide sequence (Ala-Ala-Phe) with a 7-amido-4-methylcoumarin (AMC) fluorogenic leaving group, making it highly valuable for sensitive detection of enzymatic cleavage events. The succinyl modification at the N-terminus enhances substrate specificity and stability, facilitating selective interactions with target proteases such as chymotrypsin and related serine proteases. Its unique design enables researchers to monitor proteolytic activity in real time, providing a robust tool for kinetic studies and enzyme characterization.
Protease Activity Assays: As a fluorogenic peptide substrate, N-Succinyl-Ala-Ala-Phe-AMC is extensively used in quantitative protease assays. Upon enzymatic cleavage by chymotrypsin-like serine proteases, the AMC moiety is released, resulting in a pronounced increase in fluorescence that can be easily measured. This property enables highly sensitive detection of protease activity in vitro, supporting studies on enzyme kinetics, substrate specificity, and inhibitor screening. The substrate's selectivity for chymotrypsin-like enzymes makes it ideal for dissecting the catalytic properties and substrate preferences of this important enzyme family.
Enzyme Inhibitor Screening: The fluorogenic response of the AMC group upon peptide bond hydrolysis makes this substrate particularly useful for high-throughput screening of protease inhibitors. By measuring changes in fluorescence in the presence of test compounds, researchers can rapidly assess the inhibitory potential of candidate molecules against target proteases. This approach streamlines the identification and optimization of novel inhibitors, which are valuable in both basic research and early-stage drug discovery efforts focused on proteolytic enzymes.
Enzyme Mechanism Studies: The defined peptide sequence and fluorogenic nature of N-Succinyl-Ala-Ala-Phe-AMC facilitate detailed mechanistic investigations of serine proteases. Researchers use this substrate to probe enzyme-substrate interactions, map active site characteristics, and analyze catalytic efficiency under various experimental conditions. The real-time fluorescence readout enables the collection of precise kinetic data, supporting mechanistic modeling and comparative studies across different enzyme isoforms or mutants.
Biochemical Pathway Elucidation: In complex biological samples, this substrate serves as a sensitive probe for monitoring endogenous protease activities. By incorporating it into cell lysates, tissue extracts, or other biological fluids, scientists can profile proteolytic activity patterns associated with physiological or pathological states. The ability to detect subtle changes in protease function supports investigations into regulatory mechanisms, signal transduction pathways, and the roles of proteases in diverse biological processes.
Analytical Method Development: The predictable and quantifiable fluorescence generated by AMC release has established this substrate as a standard in the development and validation of analytical methods for protease quantification. Its use in calibrating fluorometric assays ensures reproducibility and sensitivity, supporting the generation of reliable data for both research and industrial applications. The substrate's robust performance under various assay conditions makes it a preferred choice for laboratories seeking to standardize protease activity measurements.
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