Are R&D Systems Caspase Inhibitors irreversible?

Yes, the majority of R&D Systems Caspase Inhibitors have a Fluoromethyl ketone (FMK) functional group on the C-terminus of the peptide, and act as effective irreversible inhibitors with no added cytotoxic effects. Inhibitors synthesized with a benzyloxycarbonyl group (also known as BOC or Z) at the N-terminus and O-methyl side chains exhibit enhanced cellular permeability. R&D Systems also offers a General Caspase Inhibitor, Q-VD-OPh, Catalog # OPH001, as well as a FITC-conjugated pan-caspase inhibitor (ApoStat), Catalog # FMK012, which are both cell-permeable, irreversible inhibitors of caspase activity.

Does R&D Systems offer a negative control for Caspase Inihibitors with benzyloxycarbonyl group (Z-) at the N-terminus and the FMK functional group at the C-terminus?

Yes, R&D Systems offers Caspase Inhibitor Control Z-FA-FMK, Catalog # FMKC01, which is an inhibitor of cathepsins B and L but not caspases, and has been used in several systems as a negative control for peptide inhibitors of caspases.

Pan Caspase Inhibitor Z-VKD-FMK Biotinylated

Name: Pan Caspase Inhibitor Z-VKD-FMK Biotinylated
Brand: R&D Systems
SKU: FMK011

R&D Systems, part of Bio-Techne | Catalog # FMK011

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Preparation & Storage
Background
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Specific Notices

Key Product Details

Cell permeable fluoromethyl ketone (FMK)-derivatized peptides act as effective irreversible Caspase inhibitors with no cytotoxic effects and, therefore, are useful tools for studying Caspase activity.

Conjugate

Biotin

View all Caspase (Pan-specific) Small Molecules and Peptides »

Formulation, Preparation and Storage

FMK011

Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage	Store the unopened product at -20 to -70 °C. Use a manual defrost freezer and avoid repeated freeze-thaw cycles. Do not use past expiration date.

Background: Caspase (Pan-specific)

Caspases are a family of cytosolic aspartate-specific cysteine proteases involved in the initiation and execution of apoptosis. They are expressed as latent zymogens and are activated by an autoproteolytic mechanism or by processing by other proteases (frequently other caspases). Human caspases can be subdivided into three functional groups: cytokine activation (caspase-1, -4, -5, and -13), apoptosis initiation (caspase-2, -8, -9, -and -10), and apoptosis execution (caspase-3, -6, and -7).

Caspases are regulated by a variety of stimili, including APAF1, CFLAR/FLIP, NOL3/ARC, and members of the inhibitor of apoptosis (IAP) family such as BIRC1/NAIP, BIRC2/cIAP-1, BIRC3/cIAP-2, BIRC4/XIAP, BIRC5/Survivin, and BIRC7/Livin. IAP activity is modulated by DIABLO/SMAC or PRSS25/HTRA2/Omi. Cell-permeable and irreversible peptide inhibitors are also available for different caspases.

Alternate Names

CASP1, caspase 1, ICE, IL1BC, p45

Additional Caspase (Pan-specific) Products

Product Documents for Pan Caspase Inhibitor Z-VKD-FMK Biotinylated

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Product Specific Notices for Pan Caspase Inhibitor Z-VKD-FMK Biotinylated

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