A synthetic peptide inhibitor that inhibits caspase-13 and related caspase activity. FMK inhibitors are irreversible and non-toxic, and can be used in both in vivo and in vitro studies.
CAT No: R1027
Caspase-13 Inhibitor Z-LEED-FMK is a synthetic peptide-based compound designed to selectively and irreversibly inhibit the enzymatic activity of caspase-13, a member of the cysteine-aspartic acid protease family involved in programmed cell death pathways. As a fluoromethyl ketone (FMK) derivative, Z-LEED-FMK covalently modifies the active site cysteine residue of its target protease, effectively blocking substrate cleavage. Its sequence specificity, conferred by the Z-LEED peptide motif, allows for targeted inhibition in biochemical assays, making it a valuable molecular tool for dissecting the role of caspase-13 in apoptotic and inflammatory processes. Researchers utilize this inhibitor to probe cell signaling networks, validate pathway components, and elucidate the mechanistic underpinnings of caspase-mediated cellular responses.
Apoptosis research: Z-LEED-FMK is widely employed in apoptosis studies to delineate the specific contribution of caspase-13 to cell death pathways. By selectively inhibiting this protease, investigators can distinguish its functional role from other caspases and assess its involvement in intrinsic and extrinsic apoptotic signaling. This approach facilitates the identification of downstream substrates, the mapping of cleavage events, and the clarification of caspase-13's participation in cellular dismantling during programmed cell death.
Inflammatory signaling studies: The inhibitor is instrumental in investigating the intersection between caspase activity and inflammatory responses. Caspase-13 has been implicated in the processing of pro-inflammatory substrates and the regulation of cytokine maturation. Application of Z-LEED-FMK in cell-based or in vitro systems enables researchers to suppress caspase-13 activity, thereby evaluating its contribution to cytokine release, inflammasome assembly, and the propagation of inflammatory signals within immune or epithelial models.
Protease substrate identification: The specificity of Z-LEED-FMK supports its use in substrate profiling experiments. By blocking caspase-13 activity in lysates or live cells, scientists can compare proteolytic patterns and identify candidate proteins that are direct substrates of this enzyme. Mass spectrometry-based proteomics, combined with inhibitor treatment, facilitates the discovery of novel cleavage events and advances understanding of caspase-13's substrate repertoire.
Pathway validation in genetic models: In studies utilizing gene knockout or knockdown approaches, Z-LEED-FMK serves as a complementary pharmacological tool to validate phenotypes associated with caspase-13 deficiency. The inhibitor allows for temporal control of protease activity, enabling researchers to dissect acute versus chronic effects and to confirm that observed cellular outcomes are specifically attributable to caspase-13 inhibition rather than compensatory genetic adaptations.
High-content screening and assay development: The compound is also valuable in the optimization and validation of high-throughput screening assays targeting caspase-dependent processes. Its irreversible inhibitory mechanism and sequence selectivity make it suitable for use as a positive control or reference compound in assay calibration. This application is critical for the development of robust screening platforms aimed at identifying novel modulators of caspase activity, supporting both basic research and early-stage drug discovery initiatives.
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