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usage
sufficient for 96 tests
Quality Level
packaging
pkg of 1 96-well plate(s)
manufacturer/tradename
Calbiochem®
storage condition
OK to freeze
assay range
standard curve range: 63-1000 ng/mL
(as measured with purified human calpain 1)
input
sample type tissue extract(s)
sample type cell lysate
detection method
fluorometric
shipped in
wet ice
General description
A highly sensitive and specific assay for measuring Calpain 1 and 2 activity in biological samples like cell lysate or tissue extracts and for screening enzyme inhibitors. Calpains (calcium ion-dependent papain-like cysteine proteases) are widely distributed in all mammalian cells. They mediate calcium-induced activation of the Erk1/Erk2 MAPK pathway and are believed to participate in intracellular signal processing via limited proteolysis of their targets.
• Sensitive: detects calpain activity at 63-1000 ng/ml
• Specific: Substrate and inhibitor optimized for specific detection of calpain activity
• Versatile: Homogeneous 96-well format can be used with biological samples or for inhibitor screens
• Convenient: Contains all reagents to assay samples in 30 min
• Sensitive: detects calpain activity at 63-1000 ng/ml
• Specific: Substrate and inhibitor optimized for specific detection of calpain activity
• Versatile: Homogeneous 96-well format can be used with biological samples or for inhibitor screens
• Convenient: Contains all reagents to assay samples in 30 min
Components
96-Well Plate, Calpain 1 Control, Substrate, Assay Buffer, Activation Buffer, Inhibitor, Reducing Agent, Plate Sealer and a user protocol.
Warning
Toxicity: Irritant (B)
Principle
The Calbiochem InnoZyme Calpain 1 & 2 Activity Kit is designed to measure Calpain 1 and 2 activity in biological samples such as cell lysates or tissue extracts and to screen enzyme inhibitors.
Preparation Note
All reagents necessary to perform the assay are supplied with the kit. Warm all reagents (except Calpain Control and Assay Buffer) to room temperature (15-25°C) just prior to use. The following reagent preparation guidelines will result in sufficient volume for one 96-well plate.• Control, Human Calpain 1, diluted: Dilute the Control, Human Calpain 1 100-400-fold with chilled Assay Buffer; maintain on ice at all times.• Activation Buffer with Reducing Agent: Add 80 µl Reducing Agent to 9.92 ml Activation Buffer.• Substrate (1X): Dilute Substrate 1:25 by adding 200 µl Substrate to 4.8 ml Assay Buffer• Inhibitor (1X): Dilute the Inhibitor as follows:1. Dilute the Inhibitor 1:50 by adding 2 µl Inhibitor to 98 µl Assay Buffer2. Add 50 µl of the 1:50 dilution (step 1) to 4.95 ml Activation Buffer with Reducing Agent.
Dilute samples with Assay Buffer as needed.Note: Calpain is a temperature sensitive enzyme. Dilutions of calpain control must be prepared using chilled Assay Buffer and kept on ice at all times.Guidelines for sample preparation:• The recommended protein concentration for cell lysates is ≥2 mg/ml as determined using a standard protein assay (e.g. Non-Interfering Protein Assay, Cat. No. 488250 or BCA Protein Assay, Cat. No. 71285)• The recommended dilution factor for cell lysates with a protein concentration of ≥2 mg/ml is ~5 or higher
Storage and Stability
Upon arrival store the Control, Human Calpain 1 at -70°C and the remaining components at -20°C. All kit components, once opened, can be stored for up to 3 months under the following conditions:
Refrigerate (4°C): Assay Buffer, Activation Buffer, Substrate, Inhibitor, and 96-well plate
Freezer (-20°C): Reducing Agent
Freezer (-70°C): Control, Human Calpain 1
Note: Following initial use the Control, Human Calpain 1 should be dispensed into aliquots and stored at -70°C. Avoid freeze/thaw cycles.
Refrigerate (4°C): Assay Buffer, Activation Buffer, Substrate, Inhibitor, and 96-well plate
Freezer (-20°C): Reducing Agent
Freezer (-70°C): Control, Human Calpain 1
Note: Following initial use the Control, Human Calpain 1 should be dispensed into aliquots and stored at -70°C. Avoid freeze/thaw cycles.
Analysis Note
Positive Control
Calpain 1
Calpain 1
Other Notes
Higuchi, M., et al. 2005. J. Biol. Chem.280, 15229;
Tompa, P., et al. 2004. J. Biol. Chem.279, 20775;
Veeranna, et al. 2004. Am. J. Pathol.165, 795;
Dainese, E., et al. 2002. J. Biol. Chem.277, 40296;
Wang, K.K., et al. 2000. Trends Neurosci.23, 20;
Black, R.A., et al. 1997. Nature385, 729;
Molinari, M. and Carafoli, E. 1997. J. Membr. Biol.156, 1;
Sorimachi, H., et al. 1997. Biochem. J.328, 721.
Tompa, P., et al. 2004. J. Biol. Chem.279, 20775;
Veeranna, et al. 2004. Am. J. Pathol.165, 795;
Dainese, E., et al. 2002. J. Biol. Chem.277, 40296;
Wang, K.K., et al. 2000. Trends Neurosci.23, 20;
Black, R.A., et al. 1997. Nature385, 729;
Molinari, M. and Carafoli, E. 1997. J. Membr. Biol.156, 1;
Sorimachi, H., et al. 1997. Biochem. J.328, 721.
Legal Information
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Repr. 1B
Storage Class Code
6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
Certificates of Analysis (COA)
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Jayasri Nanduri et al.
Proceedings of the National Academy of Sciences of the United States of America, 106(4), 1199-1204 (2009-01-17)
Intermittent hypoxia (IH) occurs in many pathological conditions including recurrent apneas. Hypoxia-inducible factors (HIFs) 1 and 2 mediate transcriptional responses to low O(2). A previous study showed that HIF-1 mediates some of the IH-evoked physiological responses. Because HIF-2alpha is an
Yushuan Lai et al.
Frontiers in microbiology, 2, 222-222 (2011-11-11)
A member of the attaching and effacing (AE) family of pathogens, enterohemorrhagic Escherichia coli (EHEC) induces dramatic changes to the intestinal cell cytoskeleton, including effacement of microvilli. Effacement by the related pathogen enteropathogenic E. coli (EPEC) requires the activity of
Jayasri Nanduri et al.
PloS one, 8(10), e75838-e75838 (2013-10-15)
Sleep-disordered breathing with recurrent apnea produces chronic intermittent hypoxia (IH). We previously reported that IH leads to down-regulation of HIF-2α protein via a calpain-dependent signaling pathway resulting in oxidative stress. In the present study, we delineated the signaling pathways associated
Cai-Mei Zhang et al.
Circulation journal : official journal of the Japanese Circulation Society, 76(8), 1993-2002 (2012-06-06)
Berbamine, a natural compound from Barberry, was reported to protect myocardium from ischemia/reperfusion (I/R) injury, but the underlying mechanisms are largely unknown. Berbamine pretreatment from 10 to 100nmol/L concentration-dependently improved post-ischemic myocardial function. Similar protection was confirmed in isolated cardiomyocytes
N Wang et al.
American journal of physiology. Cell physiology, 310(5), C329-C336 (2015-12-15)
Human ether-a-go-go-related gene (hERG) channels conduct delayed rectifier K(+) current. However, little information is available on physiological situations affecting hERG channel protein and function. In the present study we examined the effects of intermittent hypoxia (IH), which is a hallmark
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