Z-Val-Ala-Asp (OMe)-FMK Inhibitor

Novus Biologicals | Catalog # NBP2-29392

Novus Biologicals
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Product Summary for Z-Val-Ala-Asp (OMe)-FMK Inhibitor

This inhibitor is designed as a methyl ester to facilitate cell permeability. If the intended use is on purified or recombinant enzymes, esterase should be added to generate the free carboxyl groups.
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Product Specifications

Details of Functionality

Mass Spec: M+1=468.2
Chromatography: TLC:EtOAc:80, Hex: 20, Single Spot, Rf:0.3, Single spot>95%
H NMR: All functional groups are present
HPLC: >90%
Peptide content: 81%
Formula: C22H30N3O7F
Molecular Weight: 467

Formulation, Preparation, and Storage

Formulation

Form: White Solid
Make a stock solution of 20 mM in high purity DMSO (>99.9%).

Concentration

Concentration is not relevant for this product. Please see the protocols for proper use of this product.

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Storage

Store at -20C. Avoid freeze-thaw cycles.

Background: Z-Val-Ala-Asp (OMe)-FMK

Members of the caspase family play key roles in apoptosis and inflammation. Z-VAD(OMe)-FMK is a cell-permeable pan caspase peptide inhibitor that irreversibly binds to the catalytic site of caspases proteases, and inhibits caspasemediated apoptosis by preventing the processing of pro-caspases to their active forms (reviewed in 1-3). The ZVAD( OMe) peptide is O-methylated in the P1 position providing enhanced stability and increased cell permeability. Z-VAD(OMe)-FMK (Z-VAD-FMK) is typically used in assays to inhibit apoptosis. Z-VAD-FMK has been used in many different types of apoptosis assays and published extensively; for example, a PubMed search reveals over 1000 references citing Z-VAD-FMK between 1999 and 2003. Users may want to consult the literature for additional information regarding applications for Z-VAD-FMK.

Alternate Names

Z Val Ala Asp OMe FMK, Z-Val-Ala-Asp OMe-FMK

Additional Z-Val-Ala-Asp (OMe)-FMK Products

Product Documents for Z-Val-Ala-Asp (OMe)-FMK Inhibitor

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot or batch number in the search box below.

Product Specific Notices for Z-Val-Ala-Asp (OMe)-FMK Inhibitor

This inhibitor is designed as a methyl ester to facilitate cell permeability. If the intended use is on purified or recombinant enzymes, esterase should be added to generate the free carboxyl groups.

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Inhibitors are guaranteed for 1 year from date of receipt.

Citations for Z-Val-Ala-Asp (OMe)-FMK Inhibitor

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Protocols

View specific protocols for Z-Val-Ala-Asp (OMe)-FMK Inhibitor (NBP2-29392):

Product Handling - Assay Method (NBP2-29392):
Materials:
Dissolve 1mg of Z-Val-Ala-Asp(OMe)-FMK in DMSO to get appropriate concentration:
107 ul DMSO = 20mM
214 ul DMSO = 10 mM
428 ul DMSO = 5 mM

Method:
Add 2 ul of above stock solutions to 1 ml of culture medium containing cells to give final DMSO concentration of
0.2%. Levels of DMSO above this may cause some cellular toxicity thus masking the effect of the ICE-protease
inhibitors.

FAQs for Z-Val-Ala-Asp (OMe)-FMK Inhibitor

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  • Q: For assays with recombinant enzymes, esterase should be added: which type of esterase, how much, and can you recommend a specific enzyme?

    A: When this peptide FMK inhibitor or other OMe peptide inhibitors are used with purified caspases, the ester groups are not rapidly hydrolyzed and the inhibitor-enzyme reaction rate may be reduced.. The ester groups can be removed by pretreating with esterase. For example, dilute the FMK inhibitor stock (or DMSO only for a control) 10-fold into 10 mM borate buffer, pH 8.0, containing 1 unit of esterase (e.g., carboxylic acid ester hydrolase which is available from different vendors) and incubate for 15 minutes on ice. Then dilute an additional 100-fold into the final reaction mixture and incubate again for 15 minutes prior to adding the purified caspase substrate. This is a general protocol, and you may also be able to find other suggestions in the scientific literature.

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