Product nameCaspase 1 Assay Kit (Fluorometric)
See all Caspase 1 kits
Sample typeTissue Extracts, Cell Lysate
Assay typeEnzyme activity
Assay time2h 00m
Caspase 1 Assay Kit (Fluorometric) (ab39412) provides a simple and convenient method for detecting the activity of caspase 1, which recognizes the sequence YVAD. The assay is based on detection of cleavage of substrate YVAD-AFC (AFC: 7-amino-4-trifluoromethyl coumarin). YVAD-AFC emits blue light (Em=400 nm); upon cleavage of the substrate by caspase-1 or related caspases, free AFC emits a yellow-green fluorescence (Em=505 nm), which can be quantified using a fluorometer or a fluorecence microtiter plate reader. Comparison of the fluorescence from a treated sample with an untreated control allows determination of the fold increase in caspase 1 activity.
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Caspase 1 (ICE, IL-1beta Converting Enzyme) is the prototypical member of the ICE family of proteases/caspases. Caspase 1 was first identified as a novel protease that generates the proinflammatory cytokine, interleukin 1 beta (IL-1 Beta), by cleaving the pro-interleukin after the Asp116 residue. In addition to its role in the activation of proinflammatory cytokines, Caspase 1 also appears to have functions in some, but not all, types of apoptosis in mammalian cells.
Storage instructionsStore at -20°C. Please refer to protocols.
Components 100 tests 2X Reaction Buffer 4 x 2ml Cell Lysis Buffer 1 x 100ml DTT 1 x 0.4ml YVAD-AFC 1 x 0.5ml
RelevanceCaspases are a family of cysteine proteases that are key mediators of programmed cell death or apoptosis. The precursor form of all caspases is composed of a prodomain, and large and small catalytic subunits. The active forms of caspases are generated by several stimuli including ligand-receptor interactions, growth factor deprivation and inhibitors of cellular functions. All known caspases require cleavage adjacent to aspartates to liberate one large and one small subunit, which associate into a2b2 tetramer to form the active enzyme. Caspase 1 is similar to the cell death gene CED3 of C. elegans and regulates multiple proinflammatory cytokines, including Interleukin 1b and interferon-gamma-inducing factor. Caspase 1 plays a role in down stream of Caspase 8 which is involved in Fas-mediated apoptosis.
- CASP1 nirs variant 1
- Caspase 1 apoptosis related cysteine peptidase
Titration of the caspase 1 (ab39901) (background signal subtracted, duplicates; +/- SD).
Badding M.A et al investigated the cytotoxicity of Indium-tin oxide (ITO). Previously,ITO had shown to be cytotoxic in cultured cells and pro-inflammatory in pulmonary animal models. ITO is used to make transparent conductive coatings for touch screens and liquid crystal display electronics. RAW cells were plated at 5 x 105 cells/well and treated with SITO, LPS, or Min-U-sil (cells were first primed with LPS). Cells were washed, lysed, and 100 μg of lysates were assayed using Caspase 1 assay kit (ab39412). PBS was used as a control. All conditions were run in duplicate wells and three independent experiments were performed for each time point.
This product has been referenced in:
- Yang N et al. Carnosic acid prevents dextran sulfate sodium-induced acute colitis associated with the regulation of the Keap1/Nrf2 pathway. Sci Rep 7:11036 (2017). Read more (PubMed: 28887507) »
- Badding MA et al. Sintered indium-tin oxide particles induce pro-inflammatory responses in vitro, in part through inflammasome activation. PLoS One 10:e0124368 (2015). Functional Studies . Read more (PubMed: 25874458) »