Kurzübersicht für Ac-DEVD-CHO (Caspase-3 Inhibitor) (ABIN2690899)
Applikation
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Verwendungszweck
- The tetrapeptide inhibitor can be used to identify and quantify the Caspase-3 activity in apoptotic cells, and to study events downstream of Caspase-3 activation.
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Sequenz
- Acetyl-Asp-Glu-Val-Asp-CHO
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Produktmerkmale
- Members of the ICE/CED-3 cysteine protease family have key roles in inflammation and mammalian apoptosis. The ICE family member Caspase-3 (also known as CPP32, Yama, apopain) is activated early in apoptosis and appears to be involved in the proteolysis of several important molecules, including poly (ADP ribose) polymerase (PARP). Activated Caspase-3 cleaves PARP from its 116 kD to an 85 kD residual fragment. The cleavage site in PARP is C-terminal to Asp-216. The upstream sequence of the cleavage site, DEVD (Asp-Glu-Val-Asp), is utilized as a basis for the highly specific Caspase-3 substrate, Ac-DEVD-AMC and Caspase-3 inhibitor, Ac-DEVD-CHO. Ac-DEVD-CHO is a synthetic tetrapeptide inhibitor for Caspase-3 (CPP32) and contains the amino acid sequence of the PARP cleavage site. The tetrapeptide inhibitor can be used to identify and quantify the Caspase-3 activity in apoptotic cells, and to study events downstream of Caspase-3 activation.
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Aufreinigung
- Purified
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Formel
- C20H30N4O11
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Löslichkeit
- DMSO
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Kommentare
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Spectrofluorometric analysis of Caspase-3 activity. Lysates were prepared from Daudi B cells untreated (left panel)) or treated with anti-human Fas antibody, clone DX2 (Cat. No. 555670) and Protein G (middle and right panels) for 4 hours to induce apoptosis. Cells were incubated with the Ac-DEVD-AMC, Caspase-3 substrate (left and middle panels) or the substrate and the Ac-DEVD-CHO inhibitor (right panel) and analyzed by spectrofluorometry. Left panel: Lysates from untreated cells did not emit fluorescence, indicating that the substrate was not cleaved and hence Caspase-3 activity was absent. Middle panel: Lysates from cells treated with anti-Fas mAb cleaved the substrate, indicating that presence of Caspase-3 activity. Right panel: Fluorescence was not emitted in lysates from cells treated with anti-Fas mAb when both the inhibitor and substrate were added, indicating that Caspase-3 activity was blocked. The addition of Protein G enhances the ability of clone DX2 to induce apoptosis, presumably by cross-linking Fas receptors.
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Beschränkungen
- Nur für Forschungszwecke einsetzbar
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Format
- Powder
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Rekonstitution
- Reconstitute in 1 mLDMSO to yield 1 mg/mL peptide in DMSO.
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Buffer
- Lyophilized powder
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Lagerung
- -20 °C
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Informationen zur Lagerung
- Store undiluted at -20°C. Reconstitute the substrate before use. Reconstitute in 1 ml DMSO to yield 1 mg/ml peptide in DMSO. Store the reconstituted substrate at -20°C for up to 1-2 months and avoid repeated freeze-thaw cycles, which greatly alter product stability.
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: "The role of proteases during apoptosis." in: FASEB journal : official publication of the Federation of American Societies for Experimental Biology, Vol. 10, Issue 5, pp. 587-97, (1996) (PubMed).
: "Identification and inhibition of the ICE/CED-3 protease necessary for mammalian apoptosis." in: Nature, Vol. 376, Issue 6535, pp. 37-43, (1995) (PubMed).
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Molekulargewicht
- 502 Da
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