Z-DEVD-FMK is a chemical compound used in the production of pharmaceuticals and agrichemicals.
CAT No: HB00015
Z-DEVD-FMK is a synthetic tetrapeptide inhibitor characterized by the sequence Asp-Glu-Val-Asp (DEVD) conjugated to a fluoromethyl ketone (FMK) reactive group. As a cell-permeable, irreversible inhibitor, it is widely recognized in biochemical research for its high specificity toward caspase-3 and caspase-7, two key cysteine proteases involved in the execution phase of apoptosis. The compound's design enables it to covalently modify the active site cysteine of target caspases, thereby blocking their proteolytic activity. Its utility has become integral to studies dissecting the molecular pathways of programmed cell death, making it a valuable reagent in apoptosis research and related fields.
Apoptosis research: Z-DEVD-FMK is extensively utilized to dissect the molecular mechanisms underlying programmed cell death by selectively inhibiting effector caspases. By blocking caspase-3 and caspase-7 activity, researchers can differentiate between caspase-dependent and caspase-independent apoptotic pathways in cultured cells, tissues, or in vitro systems. This enables precise mapping of the apoptotic cascade, facilitating the identification of upstream and downstream signaling events and enhancing understanding of cell fate decisions under various physiological or stress conditions.
Mechanistic studies of protease function: The compound serves as a powerful tool in elucidating the substrate specificity and catalytic mechanisms of cysteine proteases within the caspase family. Its irreversible binding to the active site allows for kinetic and structural analyses of enzyme-inhibitor complexes, providing insights into the conformational dynamics and regulatory mechanisms governing caspase activation. Such investigations are critical for advancing basic knowledge of proteolytic regulation and for informing the rational design of next-generation protease inhibitors.
Cell-based assay development: As a selective caspase inhibitor, Z-DEVD-FMK is frequently incorporated into cell-based assays to validate the role of caspase-3 and caspase-7 in apoptotic processes. By inhibiting these enzymes in situ, the compound enables researchers to assess the contribution of caspase-mediated proteolysis to phenotypic outcomes such as DNA fragmentation, membrane blebbing, or cell shrinkage. Its use in assay development supports the generation of robust, reproducible models for high-throughput screening or mechanistic studies in apoptosis research.
Neurobiology and neurotoxicity models: The selective inhibition of effector caspases by Z-DEVD-FMK is instrumental in neurobiology, where it aids in distinguishing neuronal cell death mechanisms in response to toxins, ischemia, or genetic manipulation. By preventing caspase-mediated apoptosis in primary neurons or neuronal cell lines, the compound allows for the assessment of neuroprotective strategies and the delineation of alternative cell death pathways, contributing to a deeper understanding of neurodegenerative processes and cellular stress responses.
Validation of apoptosis biomarkers: In biomarker discovery and validation studies, the use of Z-DEVD-FMK provides a critical negative control for caspase-dependent cleavage events. By selectively inhibiting caspase activity, researchers can confirm the specificity of candidate apoptosis biomarkers, such as cleaved substrates or neo-epitopes, in complex biological samples. This approach enhances the reliability of analytical methods, including immunoblotting and immunofluorescence, and supports the development of diagnostic assays for cell death quantification in research settings.
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