Product Pathways - Translational Control
Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb #3597
| Applications | Reactivity | Sensitivity | MW (kDa) | Source | Isotype |
|---|---|---|---|---|---|
| W IP IHC-P IF-IC | H M R Mk Dm | Endogenous | 38 | Rabbit | IgG |
Applications Key:
W=Western Blotting
IP=Immunoprecipitation
IHC-P=Immunohistochemistry (Paraffin)
IF-IC=Immunofluorescence (Immunocytochemistry)
Reactivity Key:
H=Human
M=Mouse
R=Rat
Mk=Monkey
Dm=D. melanogaster
Species enclosed in parentheses are predicted to react based on 100% sequence homology. Species cross-reactivity is determined by Western blot.
Specificity / Sensitivity
Phospho-eIF2alpha (Ser51) RmAb detects endogenous eIF2alpha only when phosphorylated at Ser51. The antibody does not recognize elF2alpha phosphorylated at other sites.
Source / Purification
Rabbit monoclonal antibody is produced by immunizing animals with a synthetic phospho-peptide (KLH-coupled) corresponding to residues surrounding Ser51 of human eIF2alpha.
Western Blotting
Western blot analysis of extracts from HT29 (human) and AR42J (mouse) cells, untreated or thapsigargin-treated (300 nM, 30 min), using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb (upper) or eIF2alpha Antibody #9722 (lower).
Western Blotting
Western blot analysis of extracts from HeLa and THP-1 cells untreated or phosphatase treated, using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb.
IP
Western blot analysis of immunoprecipitates from PC12 cells, using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb. Lane 1 is lysate control, lane 2 is the antibody alone as negative control and lane 3 is antibody immunocomplex of PC12 cells.
IHC-P (paraffin)
Immunohistochemical analysis of paraffin-embedded PC-3 cells untreated (left) or thapsigargin-treated (right), using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb.
IHC-P (paraffin)
Immunohistochemical analysis of paraffin-embedded human breast carcinoma, showing cytoplasmic localization, using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb.
IHC-P (paraffin)
Immunohistochemical analysis of paraffin-embedded human lung carcinoma, using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb.
IHC-P (paraffin)
Immunohistochemical analysis of paraffin-embedded human lung carcinoma using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb in the presence of control peptide (left) or Phospho-eIF2alpha (Ser51) Blocking Peptide (#1221) (right).
Background
Phosphorylation of the eukaryotic initiation factor 2 (eIF2) α subunit is a well-documented mechanism to downregulate protein synthesis under a variety of stress conditions. Eukaryotic initiation factor 2 binds GTP and Met-tRNAi and transfers Met-tRNA to the 40S subunit to form the 43S preinitiation complex (1,2). eIF2 promotes a new round of translation initiation by exchanging GDP for GTP, a reaction catalyzed by eIF2B (1,2). Kinases that are activated by viral infection (PKR), endoplasmic reticulum stress (PERK/PEK), amino acid deprivation (GCN2) or heme deficiency (HRI) can phosphorylate the α subunit of eIF2 (3,4). This phosphorylation stabilizes the eIF2-GDP-eIF2B complex and inhibits the turnover of eIF2B. Induction of PKR by IFN-γ and TNF-α induces potent phosphorylation of eIF2α at Ser51 (5,6).
- Kimball, S.R. (1999) Int. J. Biochem. Cell Biol. 31, 25-29.
- De Haro, C. et al. (1996) FASEB J. 10, 1378-1387.
- Kaufman, R.J. (1999) Genes Dev. 13, 1211-1233.
- Sheikh, M.S. and Fornace Jr., A.J. (1999) Oncogene 18, 6121-6128.
- Cheshire, J.L. et al. (1999) J. Biol. Chem. 274, 4801-4806.
- Zamanian-Daryoush, M. et al. (2000) Mol. Cell. Biol. 20, 1278-1290.
Application References
Have you published research involving the use of our products? If so we'd love to hear about it. Please let us know!
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Rabbit Monoclonals Produced Using Epitomics® Technology, U.S. Patent No. 5,675,063.
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.
