Recombinant Human cIAP-2 (HIAP-1) Protein, CF

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Summary
Reactivity HuSpecies Glossary
Applications Inhibition Activity
Format
Carrier-Free

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Recombinant Human cIAP-2 (HIAP-1) Protein, CF Summary

Details of Functionality
Measured by its ability to inhibit DEVD-AFC cleavage activity in cell extracts activated by addition of cytochrome c and dATP. The IC50 for this effect is 25-1000 nM.
Optimal dilutions should be determined by each laboratory for each application.
Source
E. coli-derived human cIAP-2/HIAP-1 protein
ATVID 10-His tag SIEGRA Human cIAP-2
(Asn2-Ser604)
Accession # Q13489
N-terminus C-terminus
Accession #
N-terminal Sequence
Ala
Protein/Peptide Type
Recombinant Enzymes
Gene
BIRC3
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain

Applications/Dilutions

Theoretical MW
71 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
73 kDa, reducing conditions
Publications
Read Publications using
817-P2 in the following applications:

Packaging, Storage & Formulations

Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 6 months from date of receipt, -70 °C as supplied.
  • 3 months, -70 °C under sterile conditions after opening.
Buffer
Supplied as a 0.2 μm filtered solution in HEPES, NaCl, DTT and Glycerol.
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Assay Procedure
  • Jurkat E6 wild type cell extracts (see supplementary methods for preparation)
  • Extraction Buffer: 50 mM HEPES, 10 mM KCl, 5 mM EGTA, 1 mM MgCl2, 0.2% CHAPS, 0.2 mM DTT, pH 7.5
  • Assay Buffer: 10 mM HEPES, 0.5 mM EGTA, 5 mM DTT, 10% Glycerol, pH 7.5
  • Recombinant Human cIAP‑2/HIAP‑1 (rhcIAP-2) (Catalog # 817-P2)
  • Cytochrome C, Bovine heart (Sigma, Catalog # C3131), 2 mg/mL stock in deionized water
  • dATP (Sigma, Catalog # D6500), 10 mM stock adjusted to pH 7.5 with NaOH
  • Cell Extracts from Jurkat E6 wild type cells (see above protocol)
  • Substrate: Ac-Asp-Glu-Val-Asp-AFC (DEVD-AFC) (MP Biomedicals, Catalog # AFC138), 10 mM stock in DMSO
  • F16 Black Maxisorp Plate (Nunc, Catalog # 475515)
  • Fluorescent Plate Reader (Model: SpectraMax Gemini EM by Molecular Devices) or equivalent
Note: All reagents and assay components should be kept on ice until use.
  1. Thaw cell extracts and centrifuge in a microcentrifuge at 14,000 rpms for 5 minutes at 4 °C. Transfer supernatants to chilled tubes and use within 1 hour.
  2. Prepare a curve of rhcIAP-2 (MW: 71,000 Da) in Extraction Buffer. Make the following serial dilutions: 2500, 1500, 500, 250, 50, 25, and 5 nM. Note: High point may not be achievable depending on lot received.
  3. Prepare the activator mixture by combining equal volumes of 2 mg/mL Cytochrome C and 10 mM dATP for working concentrations of 1 mg/mL and 5 mM, respectively.
  4. Prepare reaction mixtures in tubes by combining 10 μL of each rhcIAP-2 curve dilution, 10 μL of cell extract supernatant, and 5 μL of the cytochrome C/dATP activator mixture. Also, prepare the following controls:
    1. Total Control: 10 μL of Extraction Buffer, 10 μL of cell extract supernatant, and 5 μL of the cytochrome C/dATP activator mixture.
    2. Inactive Control: 15 μL of Extraction Buffer and 10 μL of cell extract supernatant.  The total reaction volume is 25 μL.
  5. Incubate for 60 minutes at 30 °C.
  6. After incubation, add 100 μL of Assay Buffer to each vial for a five-fold dilution. Mix briefly.
  7. Dilute Substrate to 100 μM in Assay Buffer.
  8. In a plate load 50 μL of diluted incubated reaction mixtures, and start the reaction by adding 50 μL of 100 μM Substrate.
  9. Read at excitation and emission wavelengths of 400 nm and 505 nm, respectively, in kinetic mode for 5 minutes.
  10. Derive the 50% inhibiting concentration (IC50) of rhcIAP-2 by plotting normalized activity vs. reaction concentration of rhcIAP-2 (step 4) with Semi-Log Fitting [y = A + B * Log(x)].  Solve for x when y = 50.
  11. Normalized activity may be determined using the following equation:
  12.      % Normalized Activity = Sample (RFU/min) - Inactive Control** (RFU/min) x 100%
    Total Control (RFU/min)
Per Reaction:
  • rhcIAP-2 curve:  1000, 600, 200, 100, 20, 10, and 2 nM
  • Substrate: 50 μM

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human cIAP-2 (HIAP-1) Protein, CF

  • AIP1
  • API2
  • BIRC3 baculoviral IAP repeat containing 3
  • BIRC3
  • cIAP2
  • c-IAP2
  • cIAP-2
  • HAIP1
  • HIAP1
  • HIAP-1
  • MALT2
  • MIHC
  • RNF49

Background

cIAP-2 (also known as MIHC and HIAP-1) is a member of the inhibitor of apoptosis (IAP) family of proteins that inhibit the proteolytic activity of mature caspases. cIAP-2 has 3 BIR (baculovirus inhibitor of apoptosis) domains, a RING finger domain, and a caspase recruitment domain (CARD). cIAP-2 inhibits caspases through the direct interaction of its BIR domain with the active caspase. Caspase activity may be restored through interactions with the Reaper like motif on mitochondrial proteins such as SMAC/Diablo or HtrA2/Omi. cIAP-2 is reported to be cleaved by HtrA2/Omi.

  1. Roy, N. et al. (1997) EMBO J. 23:6914.
  2. Deveraux, Q. et al. (1997) Nature 388:300.
  3. Deveraux, Q. and J. Reed (1999) Genes & Develop. 13:239.
  4. Srinivasula, S.M. et al. (2003) J. Biol. Chem. 278:31469.
  5. Yang, Q-H. et al. (2003) Genes Dev. 17:1487.

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Publications for cIAP-2/HIAP-1 (817-P2)(2)

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cIAP2 - balancing cell death and cell survival
The inhibitor of apoptosis proteins (IAPs) are important regulators of cell death and inflammation. The cellular inhibitor of apoptosis protein 2 (cIAP2) contains three Baculovirus IAP repeat (BIR) domains, a Ubiquitin associated (UBA) domain, and...  Read full blog post.

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Bioinformatics

Gene Symbol BIRC3
Entrez
Uniprot