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AB26197

Anti-EIF2S1 antibody

5

(7 Reviews)

|

(49 Publications )

Rabbit Polyclonal EIF2S1 antibody. Suitable for WB, ICC/IF and reacts with Mouse, Human, Drosophila melanogaster samples. Cited in 49 publications.
3 Images
Immunocytochemistry/ Immunofluorescence - Anti-EIF2S1 antibody (AB26197)
  • ICC/IF

Unknown

Immunocytochemistry/ Immunofluorescence - Anti-EIF2S1 antibody (AB26197)

ICC/IF image of ab26197 stained human HeLa cells. The cells were 4% PFA fixed (10 min), permabilised in TBS-T (20 min) and incubated with the antibody (ab26197, 1µg/ml) for 1h at room temperature. 1%BSA / 10% normal goat serum / 0.3M glycine was used to quench autofluorescence and block non-specific protein-protein interactions. The secondary antibody (green) was Alexa Fluor® 488 goat anti-rabbit IgG (H+L) used at a 1/1000 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red). DAPI was used to stain the cell nuclei (blue).

Western blot - Anti-EIF2S1 antibody (AB26197)
  • WB

Project

Western blot - Anti-EIF2S1 antibody (AB26197)

ab26197 detects a band of ~ 36 kDa in HeLa, Jurkat and A431 whole cell lysates. This corresponds to the predicted molecular weight for eIF2 alpha according to Swiss prot. A number of other bands are detected at ~ 48, 23 and 15 kDa. We do not know the identity of these bands and we predict they represent non-specific binding.

All lanes:

Western blot - Anti-EIF2S1 antibody (ab26197) at 1 µg/mL

Lane 1:

HeLa whole cell lysate at 20 µg

Lane 2:

Western blot - Jurkat whole cell lysate (<a href='/en-us/products/cell-lysates/jurkat-whole-cell-lysate-ab7899'>ab7899</a>) at 20 µg

Lane 3:

Western blot - A-431 whole cell lysate (<a href='/en-us/products/cell-lysates/a-431-whole-cell-lysate-ab7909'>ab7909</a>) at 20 µg

Secondary

All lanes:

Goat polyclonal to Rabbit IgG (Alexa Fluor® 680) at 1/10000 dilution

Predicted band size: 36 kDa

Observed band size: 36 kDa

false

Western blot - Anti-EIF2S1 antibody (AB26197)
  • WB

Project

Western blot - Anti-EIF2S1 antibody (AB26197)

All lanes:

Western blot - Anti-EIF2S1 antibody (ab26197) at 1 µg/mL

Lane 1:

Western blot - NIH/3T3 whole cell lysate (<a href='/en-us/products/cell-lysates/nih-3t3-whole-cell-lysate-ab7179'>ab7179</a>) at 10 µg

Lane 2:

MEF1 (Mouse embryonic fibroblast cell line) Whole Cell Lysate at 10 µg

Secondary

All lanes:

IRDye 680 Conjugated Goat Anti-Rabbit IgG (H+L) at 1/10000 dilution

Predicted band size: 36 kDa

Observed band size: 36 kDa

false

Key facts

Host species

Rabbit

Clonality

Polyclonal

Isotype

IgG

Carrier free

No

Reacts with

Mouse, Human, Drosophila melanogaster

Applications

WB, ICC/IF

applications

Immunogen

The exact immunogen used to generate this antibody is proprietary information.

Reactivity data

{ "title": "Reactivity Data", "filters": { "stats": ["", "Species", "Dilution Info", "Notes"], "tabs": { "all-applications": {"fullname" : "All Applications", "shortname": "All Applications"}, "WB" : {"fullname" : "Western blot", "shortname":"WB"}, "ICCIF" : {"fullname" : "Immunocytochemistry/ Immunofluorescence", "shortname":"ICC/IF"} }, "product-promise": { "all": "all", "testedAndGuaranteed": "tested", "guaranteed": "expected", "predicted": "predicted", "notRecommended": "not-recommended" } }, "values": { "Human": { "WB-species-checked": "testedAndGuaranteed", "WB-species-dilution-info": "", "WB-species-notes": "<p></p>", "ICCIF-species-checked": "testedAndGuaranteed", "ICCIF-species-dilution-info": "1 µg/mL", "ICCIF-species-notes": "<p></p>" }, "Mouse": { "WB-species-checked": "testedAndGuaranteed", "WB-species-dilution-info": "", "WB-species-notes": "<p></p>", "ICCIF-species-checked": "guaranteed", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "" }, "Rat": { "WB-species-checked": "predicted", "WB-species-dilution-info": "", "WB-species-notes": "", "ICCIF-species-checked": "predicted", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "" }, "Drosophila melanogaster": { "WB-species-checked": "guaranteed", "WB-species-dilution-info": "", "WB-species-notes": "<p></p>", "ICCIF-species-checked": "guaranteed", "ICCIF-species-dilution-info": "1 µg/mL", "ICCIF-species-notes": "<p></p>" } } }

Properties and storage information

Form
Liquid
Purification technique
Affinity purification Immunogen
Storage buffer
pH: 7.4 Preservative: 0.02% Sodium azide Constituents: PBS, 1% BSA
Shipped at conditions
Blue Ice
Appropriate short-term storage duration
1-2 weeks
Appropriate short-term storage conditions
+4°C
Appropriate long-term storage conditions
-20°C
Aliquoting information
Upon delivery aliquot
Storage information
Avoid freeze / thaw cycle

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

EIF2S1 also called eIF2α is a subunit of the eukaryotic translation initiation factor 2 (eIF2) complex. This protein plays an important role in the initiation of protein synthesis by regulating the binding of the initiator methionyl-tRNA to the 40S ribosomal subunit. Its molecular weight is approximately 36 kDa. EIF2S1 is widely expressed in various tissues providing a fundamental function in protein biosynthesis across different cell types.
Biological function summary

EIF2α acts as a regulatory component of the eIF2 complex which is central to initiating translation in eukaryotic cells. Phosphorylation of eIF2α leads to inhibition of the exchange of GDP to GTP on eIF2 effectively reducing global protein synthesis while allowing the translation of specific mRNAs involved in stress responses. The eIF2α forms part of the eIF2 complex working closely with other subunits to exert its regulatory functions.

Pathways

EIF2α is involved in the integrated stress response (ISR) and other protein synthesis pathways. The phosphorylation state of eIF2α is important in ISR linking it to proteins such as PERK and GCN2 which respond to various stress signals. Phospho-eIF2α plays a significant role in modulating the translation response to cellular stress ensuring cells can adapt or initiate apoptosis depending on the conditions.

EIF2α connects to diseases like Alzheimer's and diabetes. Alterations in phosphorylation of eIF2α are linked to endoplasmic reticulum stress in Alzheimer's affecting protein homeostasis. Connecting to diabetes dysregulated eIF2α signaling interferes with insulin synthesis and secretion. Proteins like ATF4 also intersect with eIF2α in these diseases highlighting eIF2α's involvement in critical pathological processes.

Product protocols

For this product, it's our understanding that no specific protocols are required. You can visit:

Target data

Member of the eIF2 complex that functions in the early steps of protein synthesis by forming a ternary complex with GTP and initiator tRNA (PubMed : 16289705, PubMed : 38340717). This complex binds to a 40S ribosomal subunit, followed by mRNA binding to form a 43S pre-initiation complex (43S PIC) (PubMed : 16289705). Junction of the 60S ribosomal subunit to form the 80S initiation complex is preceded by hydrolysis of the GTP bound to eIF2 and release of an eIF2-GDP binary complex (PubMed : 16289705). In order for eIF2 to recycle and catalyze another round of initiation, the GDP bound to eIF2 must exchange with GTP by way of a reaction catalyzed by eIF2B (PubMed : 16289705). EIF2S1/eIF2-alpha is a key component of the integrated stress response (ISR), required for adaptation to various stress : phosphorylation by metabolic-stress sensing protein kinases (EIF2AK1/HRI, EIF2AK2/PKR, EIF2AK3/PERK and EIF2AK4/GCN2) in response to stress converts EIF2S1/eIF2-alpha in a global protein synthesis inhibitor, leading to an attenuation of cap-dependent translation, while concomitantly initiating the preferential translation of ISR-specific mRNAs, such as the transcriptional activators ATF4 and QRICH1, and hence allowing ATF4- and QRICH1-mediated reprogramming (PubMed : 19131336, PubMed : 33384352, PubMed : 38340717). EIF2S1/eIF2-alpha also acts as an activator of mitophagy in response to mitochondrial damage : phosphorylation by EIF2AK1/HRI promotes relocalization to the mitochondrial surface, thereby triggering PRKN-independent mitophagy (PubMed : 38340717).
See full target information EIF2S1

Alternative Names

EIF2A, EIF2S1, Eukaryotic translation initiation factor 2 subunit 1, Eukaryotic translation initiation factor 2 subunit alpha, eIF-2-alpha, eIF-2A, eIF-2alpha, eIF2-alpha

Publications (49)

Recent publications for all applications. Explore the full listand refine your search

The Journal of cell biology 223: PubMed39150520

2024

Integrated stress response activator halofuginone protects mice from diabetes-like phenotypes.

Applications

Unspecified application

Species

Unspecified reactive species

Shashank Rai,Maria Szaruga,Aleksandra P Pitera,Anne Bertolotti

Current biology : CB 34:1390-1402.e4 PubMed38428416

2024

Collective cell migration relies on PPP1R15-mediated regulation of the endoplasmic reticulum stress response.

Applications

Unspecified application

Species

Unspecified reactive species

Yujun Chen,Jocelyn A McDonald

Molecular cell 84:506-521.e11 PubMed38159565

2024

Recruitment of trimeric eIF2 by phosphatase non-catalytic subunit PPP1R15B.

Applications

Unspecified application

Species

Unspecified reactive species

Agnieszka Fatalska,George Hodgson,Stefan M V Freund,Sarah L Maslen,Tomos Morgan,Sigurdur R Thorkelsson,Marjon van Slegtenhorst,Sonja Lorenz,Antonina Andreeva,Laura Donker Kaat,Anne Bertolotti

Experimental and therapeutic medicine 26:508 PubMed37840563

2023

Zinc oxide nanoparticles inhibit malignant progression and chemotherapy resistance of ovarian cancer cells by activating endoplasmic reticulum stress and promoting autophagy.

Applications

Unspecified application

Species

Unspecified reactive species

Wenli Gu,Caihong Yang

Nature communications 14:5535 PubMed37684277

2023

Activation of the integrated stress response by inhibitors of its kinases.

Applications

Unspecified application

Species

Unspecified reactive species

Maria Szaruga,Dino A Janssen,Claudia de Miguel,George Hodgson,Agnieszka Fatalska,Aleksandra P Pitera,Antonina Andreeva,Anne Bertolotti

The American journal of pathology 193:1528-1547 PubMed37422147

2023

Aberrations in Energetic Metabolism and Stress-Related Pathways Contribute to Pathophysiology in the Neb Conditional Knockout Mouse Model of Nemaline Myopathy.

Applications

Unspecified application

Species

Unspecified reactive species

Rebecca A Slick,Jennifer A Tinklenberg,Jessica Sutton,Liwen Zhang,Hui Meng,Margaret J Beatka,Mark Vanden Avond,Mariah J Prom,Emily Ott,Federica Montanaro,James Heisner,Rafael Toro,Henk Granzier,Aron M Geurts,David F Stowe,R Blake Hill,Michael W Lawlor

The American journal of pathology 193:1548-1567 PubMed37419385

2023

Different Mouse Models of Nemaline Myopathy Harboring Acta1 Mutations Display Differing Abnormalities Related to Mitochondrial Biology.

Applications

Unspecified application

Species

Unspecified reactive species

Jennifer A Tinklenberg,Rebecca A Slick,Jessica Sutton,Liwen Zhang,Hui Meng,Margaret J Beatka,Mark Vanden Avond,Mariah J Prom,Emily Ott,Federica Montanaro,James Heisner,Rafael Toro,Edna C Hardeman,Aron M Geurts,David F Stowe,R Blake Hill,Michael W Lawlor

Open biology 13:230008 PubMed37042114

2023

The small compound Icerguastat reduces muscle defects in oculopharyngeal muscular dystrophy through the PERK pathway of the unfolded protein response.

Applications

Unspecified application

Species

Unspecified reactive species

Rima Naït-Saïdi,Aymeric Chartier,Emmanuelle Abgueguen,Philippe Guédat,Martine Simonelig

International journal of molecular sciences 24: PubMed36835532

2023

MSX1 Regulates Goat Endometrial Function by Altering the Plasma Membrane Transformation of Endometrial Epithelium Cells during Early Pregnancy.

Applications

Unspecified application

Species

Unspecified reactive species

Beibei Zhang,Zongjie Wang,Kangkang Gao,Rao Fu,Huatao Chen,Pengfei Lin,Aihua Wang,Yaping Jin

Neural regeneration research 18:1750-1756 PubMed36751801

2023

Piezo1 suppression reduces demyelination after intracerebral hemorrhage.

Applications

Unspecified application

Species

Unspecified reactive species

Jie Qu,Hang-Fan Zong,Yi Shan,Shan-Chun Zhang,Wei-Ping Guan,Yang Yang,Heng-Li Zhao
View all publications

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