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Description: Caspase-9, formerly called Apaf-3, binds to Apaf-1 in the presence of cytochrome c and dATP (3), which leads to caspase-9 activation. Activated caspase-9 in turn cleaves and activates caspase-3; caspase-9 thus is the most upstream member of the apoptotic protease cascade that is triggered by cytochrome c and dATP.
Caspase-9 is essentially localized in mitochondria, the disruption of the outer mitochondrial membrane occurring early during apoptosis is critical for its subcellular redistribution and activation.
Applications Tested: Immunoprecipitation, Western Blotting.
Reconstitiution Instructions: We recommend a quick spin followed by reconstitution in 1 mL distilled water (incubate at 30°C for 5 minutes). Reconstituted solution contains 20 mM phosphate buffer (pH 7.0), 0.02% Tween 80, 30 mM Arginine HCL.
Caspase 9 (ICE-like apoptotic protease 6, ICE LAP6, apoptotic protease Mch6, apoptotic protease activating factor 3, Apaf3) is a member of the peptidase family C14 that contains a CARD domain. Caspases are cysteine proteases, expressed as inactive precursors, that mediate apoptosis by proteolysis of specific substrates. Caspase 9 is active as a heterotetramer, is present in the cytosol and, upon activation, translocates to the mitochondria. Caspase 9 is involved in the caspase activation cascade responsible for apoptosis execution and cleaves/activates Caspase 3 and Caspase 6. Further, Caspase 9 is involved in the activation cascade of caspases responsible for apoptosis execution. Binding of caspase-9 to Apaf- 1 leads to activation of the protease which then cleaves and activates caspase-3. Caspase 9 promotes DNA damage-induced apoptosis in a ABL1/c-Abl-dependent manner, and proteolytically cleaves poly(ADP- ribose) polymerase (PARP). Caspase 9 is expressed in variety of human tissues. An isoform of rat Caspase-9 has been identified in which the C terminus of full-length Caspase-9 is replaced with an alternative peptide sequence. Mutations in Caspase 9 affect brain development. In mice, insufficient Caspase 9 have resulted in abnormal cerebrum development and neuron development. In humans, dysfunctional Caspase 9 expression vary from tissue to tissue. Low levels of Caspase 9 may play a role in cancer development and neurodegenerative diseases such as Alzheimer's Disease (AD).
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: APAF-3; apoptotic protease activating factor 3; Apoptotic protease Mch-6; Apoptotic protease-activating factor 3; cas9; CASP 9; CASP-9; caspase 9, apoptosis-related cysteine peptidase; Caspase-9; Caspase-9 precursor; Caspase-9 subunit p10; Caspase-9 subunit p35; CASPASE-9c; Caspase9; CTD; ICE-LAP6; ICE-like apoptotic protease 6; OTTHUMP00000002324; protein phosphatase 1, regulatory subunit 56; RNCASP9; RP11-265F14.3
Gene Aliases: CASP9; MCH6
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