Cell Signaling Technology

Product Pathways - Apoptosis / Autophagy

PARP (46D11) Rabbit mAb #9532

Applications Reactivity Sensitivity MW (kDa) Isotype
W IP IF-IC H M R Mk Endogenous 116, 89 Rabbit IgG

Applications Key:  W=Western Blotting  IP=Immunoprecipitation  IF-IC=Immunofluorescence (Immunocytochemistry)
Reactivity Key:  H=Human  M=Mouse  R=Rat  Mk=Monkey
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

PARP (46D11) Rabbit mAb detects endogenous levels of total full-length PARP and the large fragment (89 kDa) produced by caspase cleavage.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Gly623 of PARP.

Western Blotting

Western Blotting

Western blot analysis of extracts from THP-1 cells, untreated or treated with TNF-α and cycloheximide as well as control extracts from SW620 and A20 cell lines, using PARP (46D11) Rabbit mAb.

IF-IC

IF-IC

Confocal immunofluorescent analysis of untreated HeLa cells labeled with PARP (46D11) Rabbit mAb (green). Actin filaments have been labeled with Alexa Fluor® 555 phalloidin (red).

Background

PARP, a 116 kDa nuclear poly (ADP-ribose) polymerase, appears to be involved in DNA repair in response to environmental stress (1). This protein can be cleaved by many ICE-like caspases in vitro (2,3) and is one of the main cleavage targets of caspase-3 in vivo (4,5). In human PARP, the cleavage occurs between Asp214 and Gly215, which separates the PARP amino-terminal DNA binding domain (24 kDa) from the carboxy-terminal catalytic domain (89 kDa) (2,4). PARP helps cells to maintain their viability; cleavage of PARP facilitates cellular disassembly and serves as a marker of cells undergoing apoptosis (6).

  1. Satoh, M.S. and Lindahl, T. (1992) Nature 356, 356-358.
  2. Lazebnik, Y. A. et al. (1994) Nature 371, 346-347.
  3. Cohen, G.M. (1997) Biochem. J. 326, 1-16.
  4. Nicholson, D. W. et al. (1995) Nature 376, 37-43.
  5. Tewari, M. et al. (1995) Cell 81, 801-809.
  6. Oliver, F.J. et al. (1998) J. Biol. Chem. 273, 33533-33539.

Application References

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Companion Products

Rabbit Monoclonals Produced Using Epitomics® Technology, U.S. Patent No. 5,675,063.

This product is intended for research purposes only. The product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.

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