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Calpain Activity Assay Kit (ab65308)

Overview

  • Product nameCalpain Activity Assay Kit
  • Tests
    100 x 1 assay
  • Sample type
    Tissue Extracts, Cell Lysate
  • Assay typeQuantitative
  • Assay time
    2h 00m
  • Product overview

    Abcam's Calpain Activity Assay Kit provides optimized buffers and reagents for a convenient measurement of calpain activity. The Extraction Buffer provided with the kit specifically extracts cytosolic proteins without contaminations of cell membrane and lysosome proteases. The Extraction Buffer also prevents auto-activation of calpain during the extraction procedure. Thus, the kit detects only activated calpain in cytosol upon treatment of cells with inducers (e.g., chemicals or drugs). The fluorometric assay is based on the detection of cleavage of calpain substrate Ac-LLY-AFC. Ac-LLY-AFC emits blue light (λmax = 400 nm); upon cleavage of the substrate by calpain, free AFC emits a yellow-green fluorescence (λmax = 505 nm), which can be quantified using a fluorometer or a fluorecence plate reader. Comparison of the fluorescence intensity from a treated sample with a normal control allows determination of the changes in calpain activity.
    Visit our FAQs page for tips and troubleshooting.

  • Notes

    Activation of calpain is involved in many forms of physiological and pathological processes (e.g., apoptosis). Calpain activation requires cell membrane and Ca²+, and activated calpain is released into cytosol.

  • Tested applicationsFunctional Studies more details

Properties

  • Storage instructionsStore at -20°C. Please refer to protocols.
  • Components Identifier 100 tests
    10X Reaction Buffer Clear 1 x 1.5ml
    Active Calpain I (Positive Control) Green 1 x 10µl
    Calpain Inhibitor Z-LLY-FMK Orange 1 x 10µl
    Calpain Substrate Ac-LLY-AFC Amber 1 x 500µl
    Extraction Buffer WM 1 x 25ml
  • Research Areas
  • FunctionCalcium-regulated non-lysosomal thiol-protease which catalyze limited proteolysis of substrates involved in cytoskeletal remodeling and signal transduction.
  • Tissue specificityUbiquitous.
  • Sequence similaritiesBelongs to the peptidase C2 family.
    Contains 1 calpain catalytic domain.
    Contains 4 EF-hand domains.
  • Cellular localizationCytoplasm. Cell membrane. Translocates to the plasma membrane upon Ca(2+) binding.
  • Target information above from: UniProt accession P07384 The UniProt Consortium
    The Universal Protein Resource (UniProt) in 2010
    Nucleic Acids Res. 38:D142-D148 (2010) .

    Information by UniProt
    • Alternative names
        Calcium activated neutral proteinase 1Calcium-activated neutral proteinase 1Calpain 1 (mu/I) large subunit
        Calpain 1 catalytic subunitCalpain 1 large subunitCalpain large polypeptide L1Calpain mu typeCalpain mu-typeCalpain-1 catalytic subunitCalpain-1 large subunitCAN1_HUMANCANPCANP 1CANP1CANPL1CAPN 1CAPN1Cell proliferation inducing gene 30 proteinCell proliferation inducing protein 30Cell proliferation-inducing gene 30 proteinMicromolar calpainMicromolar-calpainmuCANPmuCL
      see all

    Applications

    Our Abpromise guarantee covers the use of ab65308 in the following tested applications.

    The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

    Application Notes
    Functional Studies FuncS

    Calpain Activity Assay Kit images

    • Typical Data for ab65308: Active Calpain (1 µg) was incubated at 37°C for one hour using the Calpain Substrate with or without 20 µM Calpain Inhibitor.
    • Typical Data for ab65308: Active Calpain (1 μg) was incubated at 37 °C for one hour using the Calpain Substrate with or without 20 μM Calpain Inhibitor.

    Protocols

    References for Calpain Activity Assay Kit (ab65308)

    This product has been referenced in:
    • Liu D  et al. Activation of calpains mediates early lung neutrophilic inflammation in ventilator-induced lung injury. Am J Physiol Lung Cell Mol Physiol 302:L370-9 (2012). Functional Studies ; Mouse . Read more (PubMed: 22140070) »
    • Das A  et al. Post-treatment with voltage-gated Na(+) channel blocker attenuates kainic acid-induced apoptosis in rat primary hippocampal neurons. Neurochem Res 35:2175-83 (2010). Functional Studies ; Rat . Read more (PubMed: 21127971) »

    See all 2 Publications for this product

    Product Wall

    Displaying 1 - 10 of 21 results for Abreviews and Q&A

    The success of this kit with frozen samples depends on how well the samples were frozen, for how long they had been frozen, if they underwent repeated freeze thaw and so on.
    Immediate freezing of the sample in aliquots and storing for up to 2 months ...

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    I can confirm that for the sample preparation the cells will not need to be trypsinized. They can be scraped from the flask after after adding the extraction buffer and incubated, but keep in mind that this would dilute the sample for the activity assay. ...

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    This Calpain Activity Assay Kit includes Active Calpain I as positive control.

    The Calpain protein provided in ab65308 is a native protein. We pack 14.5 ug of Calpain/tube in this kit.

    Thank you once again for your enquiries.

    I have obtained some further information for you.

    Unfortunately, I cannot disclose the contents of the extraction buffer due to proprietary restrictions, but I can assure you that it is strong...

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    Hello. No, this is not exactly the same, the protein ab91019 comes from another source. They are very similar though. Please let me know if you have any further questions.

    Thank you for your email.

    The kit is specific to all forms of Calpain enzymes not only the calpain 1.

    Biochemically this kit is based on the fact that the Calpain enzymes present in cell lysates cleave the calpain substrate Ac-LLY-AFC...

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    Thank you for your response.

    My colleague is out of office today. I can confirm that ab65308 (Calpain Activity Assay Kit) can detect multiple Calpain enzymes (1,2,3,4) - not just Calpain 1.

    I hope this information will be useful for yo...

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    Thanks you for confirming the details.

    The inducer term was indeed meant for positive control. From the provided details and data readings, I can now say that the kit is working perfect. I assume the problem could be in sample or conditions you ...

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    Thank you very much for your email. I am sorry to hear that you are having trouble using this kit.

    We have provided Calpain inhibitor and inducer as negative and positive control in the kit. In your data the duplicate negative control readings ...

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    Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"