Cell Signaling Technology

Product Pathways - Apoptosis / Autophagy

Caspase-7 Antibody #9492

Applications Reactivity MW (kDa) Source
W F H M R 20, 35 Rabbit

Applications Key:  W=Western Blotting  F=Flow Cytometry
Reactivity Key:  H=Human  M=Mouse  R=Rat
Species enclosed in parentheses are predicted to react based on 100% sequence homology. Species cross-reactivity is determined by Western blot.

Specificity / Sensitivity

Caspase-7 Antibody detects endogenous levels of both full length caspase-7 (35 kDa) and the large fragment of cleaved caspase-7 following cleavage at aspartic acid 198 (20 kDa). The antibody does not recognize other caspases.

Source / Purification

Polyclonal antibodies are produced by immunizing rabbits with a synthetic peptide (KLH coupled) corresponding to residues surrounding the cleavage site of human caspase-7. Antibodies are purified by protein A and peptide affinity chromatography.

Western Blotting

Western Blotting

Western blot analysis of extracts from Jurkat cells, untreated or etoposide-treated (25 µM), and Hela cells, untreated or staurosporine-treated (1 µM), using Caspase-7 Antibody.

Flow Cytometry

Flow Cytometry

Flow cytometric analysis of Jurkat cells, untreated (blue) or etoposide-treated (green), using Caspase-7 Antibody compared to a nonspecific negative control antibody (red).

Background

Caspase-7 (CMH-1, Mch3, ICE-LAP3) has been identified as a major contributor to the execution of apoptosis (2-4). Caspase-7 is an effector caspase (along with caspase-2 and -3), meaning that it cleaves essential cellular machinery rather than activating other caspases (5-8). Caspase-7 is cleaved by many enzymes, including caspases-3, -6, -8, -9 and granzyme B (1,4,5). Once activated, caspase-7 cleaves many of the same substrates as caspase-3, including poly (ADP-ribose) polymerase, or PARP (2,4).

  1. Fernandes-Alnemri, T. et al. (1995) Cancer Res. 55, 6045-6052.
  2. Duan, H. et al. (1996) J. Biol. Chem. 271, 1621-1625.
  3. Lippke, J. A. et al. (1996) J. Biol. Chem. 271, 1825-1828.
  4. Cohen, G.M. (1997) Biochem. J. 326, 1-16.
  5. Thornberry, N. A. et al. (1997) J. Biol. Chem. 272, 17907-17911.
  6. Chandler, J. M. et al. (1998) J. Biol. Chem. 273, 10815-10818.
  7. MacFarlane, M. et al. (1997) J. Cell Biol. 137, 469-479.
  8. Nu?ez, G. et al. (1998) Oncogene 17, 3237-3245.

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