Cell Signaling Technology

Product Pathways - Apoptosis / Autophagy

Cleaved Caspase-9 (Asp353) Antibody (Mouse Specific) #9509

Applications Reactivity Sensitivity MW (kDa) Source
W IF-IC M Endogenous 37 Rabbit

Applications Key:  W=Western Blotting  IF-IC=Immunofluorescence (Immunocytochemistry)
Reactivity Key:  M=Mouse
Species cross-reactivity is determined by Western blot.

Specificity / Sensitivity

Cleaved Caspase-9 (Asp353) Antibody (Mouse Specific) detects endogenous levels of the 37kDa subunit of mouse caspase-9 only after after cleavage at aspartic acid 353. It does not cross-react with full length caspase-9 or with other caspases at endogenous levels.

Source / Purification

Polyclonal antibodies are produced by immunizing rabbits with a synthetic peptide (KLH-coupled) corresponding to residues surrounding Asp353 of mouse caspase-9. Antibodies are purified by protein A and peptide affinity chromatography.

Western Blotting

Western Blotting

Western blot analysis of extracts from L929 cells, untreated or staurosporine-treated, using Cleaved Caspase-9 (Asp353) Antibody (upper) or Caspase-9 Antibody #9504 (lower).

IF-IC

IF-IC

Confocal immunofluorescent analysis of NIH/3T3 cells, staurosporine-treated (left) or untreated (right), using Cleaved Caspase-9 (Asp353) Antibody (Mouse Specific) (green). Actin filaments have been labeled with Alexa Fluor® 555 phalloidin (red). Blue pseudocolor = DRAQ5™ (fluorescent DNA dye).

Background

Caspase-9 (ICE-LAP6, Mch6) is an important member of the cysteine aspartic acid protease (caspase) family (1,2). Upon apoptotic stimulation, cytochrome c released from mitochondria associates with the 47 kDa procaspase-9/Apaf 1. This complex processes procaspase-9 into a large active fragment (35 kDa or 17 kDa) and a small fragment (10 kDa) by self-cleavage at Asp315 (3-5). Cleaved caspase-9 further processes other caspase members, including caspase-3 and caspase-7, to initiate a caspase cascade, which leads to apoptosis (6-9). In addition to self-cleavage, procaspase-9 can also be cleaved in vivo by caspase-3 at Asp330. This process serves as positive feedback to amplify the apoptotic signal in the caspase activation pathway (3-5).

  1. Duan, H. et al. (1996) J. Biol. Chem. 271, 16720-16724.
  2. Srinivasula, S. M. et al. (1996) J. Biol. Chem. 271, 27099-27106.
  3. Liu, X. et al. (1996) Cell 86, 147-157.
  4. Li, P. et al. (1997) Cell 91, 479-489.
  5. Zou, H. et al. (1999) J. Biol. Chem. 274, 11549-11556.
  6. Deveraux, Q. L. et al. (1998) EMBO J. 17, 2215-2223.
  7. Slee, E. A. et al. (1999) J. Cell Biol. 144, 281-292.
  8. Sun, X. et al. (1999) J. Biol. Chem. 274, 5053-5060.
  9. MacFarlane, M. et al. (1997) J. Cell Biol. 137, 469-479.

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This product is for in vitro research use only and is not intended for use in humans or animals. This product is not intended for use as therapeutic or in diagnostic procedures.

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