Cell Signaling Technology

Product Pathways - Translational Control

CHOP (D46F1) Rabbit mAb #5554

Applications Reactivity Sensitivity MW (kDa) Isotype
W IP M (H) (R) Endogenous 27 Rabbit IgG

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

Protocols

Specificity / Sensitivity

CHOP (D46F1) Rabbit mAb detects endogenous levels of total CHOP protein.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Leu159 of human CHOP protein.

Western Blotting

Western Blotting

Western blot analysis of extracts from C2C12 cells, untreated or tunicamycin-treated (2 μg/ml, 8 hr), using CHOP (D46F1) Rabbit mAb (upper) or β-Actin Antibody #4967 (lower).

Background

CHOP was identified as a C/EBP-homologous protein that inhibits C/EBP and LAP in a dominant-negative manner (1). CHOP expression is induced by certain cellular stresses including starvation and the induced CHOP suppresses cell cycle progression from G1 to S phase (2). Later it was shown that, during ER stress, the level of CHOP expression is elevated and CHOP functions to mediate programmed cell death (3). Studies also found that CHOP mediates the activation of GADD34 and Ero1-Lα expression during ER stress. GADD34 in turn dephosphorylates phospho-Ser51 of eIF2α thereby stimulating protein synthesis. Ero1-Lα promotes oxidative stress inside the endoplasmic reticulum (ER) (4). The role of CHOP in the programmed cell death of ER-stressed cells is correlated with its role promoting protein synthesis and oxidative stress inside the ER (4).

  1. Ron, D. and Habener, J.F. (1992) Genes Dev 6, 439-53.
  2. Barone, M.V. et al. (1994) Genes Dev 8, 453-64.
  3. Zinszner, H. et al. (1998) Genes Dev 12, 982-95.
  4. Marciniak, S.J. et al. (2004) Genes Dev 18, 3066-77.

Application References

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Companion Products

For Research Use Only. Not For Use In Diagnostic Procedures.

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