EIF 2 alpha; EIF 2; EIF 2A; EIF 2alpha; eIF-2-alpha; eIF-2A; EIF-2alpha; EIF2 alpha; EIF2; EIF2A; EIF2S1; Eukaryotic translation initiation factor 2 subunit 1 alpha 35kDa; Eukaryotic translation initiation factor 2 subunit 1 alpha; Eukaryotic translation initiation factor 2 subunit 1; Eukaryotic translation initiation factor 2 subunit alpha; IF2A_HUMAN;
WB 1:500-1:2000, IHC 1:50-1:500, IF/ICC 1:100-1:500, ELISA(peptide) 1:20000-1:40000
*The optimal dilutions should be determined by the end user.
Human, Mouse, Rat
Pig, Bovine, Horse, Sheep, Rabbit, Dog, Chicken, Xenopus
The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho-peptide and non-phospho-peptide affinity columns.
Phospho-eIF2 alpha (Ser51) Antibody detects endogenous levels of eIF2 alpha only when phosphorylated at Ser52, which site historically referenced as Ser51.
Please cite this product as: Affinity Biosciences Cat# AF3087, RRID:AB_2834524.
Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.Store at -20 °C.Stable for 12 months from date of receipt.
A synthesized peptide derived from human eIF2 alpha around the phosphorylation site of Ser51.
Observed Mol.Wt.: 38kD.
Predicted Mol.Wt.: 36kDa(Calculated)..
Cytoplasmic granule. The cytoplasmic granules are stress granules which are a dense aggregation in the cytosol composed of proteins and RNAs that appear when the cell is under stress. Colocalizes with NANOS3 in the stress granules (By similarity).
eIF2A a translation initiation factor that functions in the early steps of protein synthesis by forming a ternary complex with GTP and initiator tRNA. This complex binds to a 40s ribosomal subunit, followed by mRNA binding to form a 43S preinitiation complex.
Functions in the early steps of protein synthesis by forming a ternary complex with GTP and initiator tRNA. This complex binds to a 40S ribosomal subunit, followed by mRNA binding to form a 43S pre-initiation complex. Junction of the 60S ribosomal subunit to form the 80S initiation complex is preceded by hydrolysis of the GTP bound to eIF-2 and release of an eIF-2-GDP binary complex. In order for eIF-2 to recycle and catalyze another round of initiation, the GDP bound to eIF-2 must exchange with GTP by way of a reaction catalyzed by eIF-2B.
Substrate for at least 4 kinases: EIF2AK1/HRI, EIF2AK2/PKR, EIF2AK3/PERK and EIF2AK4/GCN2. Phosphorylation stabilizes the eIF-2/GDP/eIF-2B complex and prevents GDP/GTP exchange reaction, thus impairing the recycling of eIF-2 between successive rounds of initiation and leading to global inhibition of translation. Phosphorylated; phosphorylation on Ser-52 by the EIF2AK4/GCN2 protein kinase occurs in response to amino acid starvation and UV irradiation (By similarity).
Note: Colocalizes with NANOS3 in the stress granules.
Heterotrimer composed of an alpha, a beta and a gamma chain. Component of an EIF2 complex at least composed of CELF1/CUGBP1, CALR, CALR3, EIF2S1, EIF2S2, HSP90B1 and HSPA5. Interaction with METAP2 protects EIF2S1 from inhibitory phosphorylation (By similarity). Interacts with ABCF1 isoform 2. Associates with ribosomes. Interacts with DDX3X in an RNA-independent manner.
Belongs to the eIF-2-alpha family.
· Cellular Processes > Transport and catabolism > Autophagy - animal.(View pathway)
· Cellular Processes > Cell growth and death > Apoptosis.(View pathway)
· Genetic Information Processing > Translation > RNA transport.
· Genetic Information Processing > Folding, sorting and degradation > Protein processing in endoplasmic reticulum.(View pathway)
· Human Diseases > Endocrine and metabolic diseases > Non-alcoholic fatty liver disease (NAFLD).
· Human Diseases > Infectious diseases: Viral > Hepatitis C.
· Human Diseases > Infectious diseases: Viral > Measles.
· Human Diseases > Infectious diseases: Viral > Influenza A.
· Human Diseases > Infectious diseases: Viral > Herpes simplex infection.
Application: WB Species:mouse; Sample:liver
Figure 7. Effect of A22 on ameliorating apoptosis, ER stress, inflammation, metabolic syndrome, and fibrogenesis in HF diet-fed mice. (A) Effect of A22 on BCL-2 gene transcription. (B) Effect of A22 on BAX gene transcription. (C) Effect of A22 on expressions of apoptosis-related proteins in liver. The extracted proteins from the liver were immunoblotted with specific antibodies, and quantified based on the loading control of ACTIN. (D) Effect of A22 on ER stress. The UPR proteins (IRE-1, PERK, elF-2 and CHOP) were analyzed by using western Blot. (E) Effect of A22 on expressions of inflammatory factors. (F) Effect of A22 on expressions of fibrogenic proteins.
Application: WB Species:human; Sample:MCF-7,MDA-MB-231
Fig. 5 BA triggers breast cancer cells apoptosis via ER stress-mediated pathway. a MCF-7 and MDA-MB-231 cells were treated with the indicated concentrations of BA for 24 h, and the protein levels of ER stress-associated signals were stimulated by BA in a dose-dependent manner, including GRP78, p-PERK/PERK, p-eIF2α/eIF2α, CHOP, and caspase-12. b MCF-7 and MDA-MB-231 cells were treated with BA alone or in combination with taxol for 24 h, the expression levels of GRP78, p-PERK/PERK, p-eIF2α/eIF2α, CHOP, and caspase-12 were also significantly upregulated following drug administration, especially in the co-treatment group, indicating the ER stress-mediated apoptosis pathway was aggravatedly activated by drug combination.
Tips: For phospho antibody, we provide phospho peptide（0.5mg) and non-phospho peptide(0.5mg).
Blocking peptides are peptides that bind specifically to the target antibody and block antibody binding. These peptide usually contains the epitope recognized by the antibody. Antibodies bound to the blocking peptide no longer bind to the epitope on the target protein. This mechanism is useful when non-specific binding is an issue, for example, in Western blotting (immunoblot) and immunohistochemistry (IHC). By comparing the staining from the blocked antibody versus the antibody alone, one can see which staining is specific; Specific binding will be absent from the western blot or immunostaining performed with the neutralized antibody.
Synthetic peptide was lyophilized with 100% acetonitrile and is supplied as a powder. Reconstitute with 0.1 ml DI water for a final concentration of 10 mg/ml.The purity is >90%,tested by HPLC and MS.Storage Maintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C.
This product is for research use only. Not for use in diagnostic or therapeutic procedures.
|S49||Phosphorylation||Q9NZJ5 (EIF2AK3) , Q9BQI3 (EIF2AK1) , P19525 (EIF2AK2) , Q75MR0 (HRI)||Uniprot|
|S52||Phosphorylation||B4DS64 (PRKRIR) , P51812 (RPS6KA3) , P19525 (EIF2AK2) , P28482 (MAPK1) , Q75MR0 (HRI) , Q9BQI3 (EIF2AK1) , Q9NZJ5 (EIF2AK3) , Q05655 (PRKCD) , Q16539 (MAPK14) , Q9P2K8 (EIF2AK4)||Uniprot|