Product Pathways - Protein Translation
Phospho-eIF2α (Ser51) (119A11) Rabbit mAb #3597
|3597L||300 µl (30 western blots)||---||In Stock||---|
|3597S||100 µl (10 western blots)||---||In Stock||---|
|3597||carrier free and custom formulation / quantity||email request|
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|W||1:1000||Human, Mouse, Rat, Monkey, D. melanogaster||Endogenous||38||Rabbit IgG|
Species cross-reactivity is determined by western blot.
Applications Key: W=Western Blotting, IP=Immunoprecipitation, IHC-P=Immunohistochemistry (Paraffin)
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
Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser51 of human eIF2alpha.
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 blot analysis of extracts from HeLa and THP-1 cells untreated or phosphatase treated, using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb.
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.
Immunohistochemical analysis of paraffin-embedded PC-3 cells untreated (left) or thapsigargin-treated (right), using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb.
Immunohistochemical analysis of paraffin-embedded human breast carcinoma, showing cytoplasmic localization, using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb.
Immunohistochemical analysis of paraffin-embedded human lung carcinoma, using Phospho-eIF2alpha (Ser51) (119A11) Rabbit mAb.
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. eIF2 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.
- Wu, M. et al. (2010) Rejuvenation Res 13, 571-9. Applications: Western Blotting.
- Kim, I. et al. (2009) J Biol Chem 284, 1593-603. Applications: Western Blotting.
- De Raedt, T. et al. (2011) Cancer Cell 20, 400-13. Applications: Western Blotting.
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For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology® is a trademark of Cell Signaling Technology, Inc.
This antibody is developed, validated, and produced by CST using in part technology under license (granting certain rights including those under U.S. Patents No. 5,675,063 and 7,429,487) from Epitomics, Inc.