Z-VEID-FMK is a synthetic peptide that irreversibly inhibits activity of VEID-dependent caspases (e.g., caspase-6). The inhibitor is designed as a methyl ester to facilitate cell permeability. Can be used for both in vitro and in vivo studies.
Caspase-6 Inhibitor Z-VEID-FMK is a synthetic peptide-based compound designed to selectively and irreversibly inhibit the activity of caspase-6, a cysteine protease implicated in the execution phase of apoptosis and various cellular remodeling processes. Structurally, it features the VEID peptide sequence conjugated to a fluoromethyl ketone (FMK) group, enabling covalent modification and inactivation of the caspase-6 active site. This inhibitor has become an essential molecular tool in cell biology and neurodegeneration research, offering precise modulation of caspase-6-mediated pathways and facilitating mechanistic studies of programmed cell death and related cellular events.
Apoptosis research: Z-VEID-FMK is widely employed in the investigation of programmed cell death, particularly in dissecting the specific roles of caspase-6 in the apoptotic cascade. By selectively blocking caspase-6 activity, researchers can delineate the contribution of this protease to nuclear lamina disassembly, chromatin condensation, and DNA fragmentation. Its use helps clarify downstream effects distinct from those mediated by other effector caspases, thereby advancing understanding of apoptosis regulation and the interplay between different proteolytic enzymes.
Neurodegeneration studies: The inhibitor has proven valuable in studies of neurodegenerative diseases, where caspase-6 activation is implicated in axonal degeneration and neuronal loss. By applying Z-VEID-FMK in neuronal cultures or ex vivo tissue models, investigators can probe the mechanistic links between caspase-6 activity and pathological protein processing, such as tau cleavage in Alzheimer's disease models. This enables targeted exploration of neuroprotective strategies and the development of novel hypotheses regarding disease progression.
Protease substrate validation: In the context of substrate identification and validation, Z-VEID-FMK serves as a critical control for confirming the specificity of caspase-6-mediated cleavage events. Incorporating the inhibitor into in vitro cleavage assays or cell-based experiments allows researchers to distinguish direct substrates from those processed by other caspases or unrelated proteases. This approach enhances the accuracy of substrate mapping and supports the development of selective biochemical assays.
Cell signaling pathway analysis: The compound is instrumental in the dissection of intricate signaling networks where caspase-6 acts as a regulatory node. By inhibiting caspase-6, scientists can assess its influence on non-apoptotic pathways, including those involved in cellular differentiation, cytoskeletal remodeling, and inflammation. The ability to modulate caspase-6 activity with high specificity provides a robust platform for elucidating novel functions of this protease beyond canonical cell death pathways.
High-content screening and drug discovery: Z-VEID-FMK is also utilized in high-throughput screening platforms aimed at identifying modulators of caspase-6 activity. Its well-characterized inhibitory profile makes it an effective positive control or reference compound in the evaluation of small-molecule libraries or peptide-based inhibitors. This application accelerates the discovery and optimization of new chemical entities targeting apoptotic and neurodegenerative processes, supporting both basic research and early-stage drug development initiatives.
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