Date published: 2026-2-22

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eIF2S3 Activators

eIF2S3, as a core component of the eukaryotic initiation factor 2 complex, plays a crucial role in regulating the initiation phase of protein synthesis. Its activity largely pivots on the phosphorylation state of its partnering subunit, eIF2α. The ensemble of chemicals dubbed eIF2S3 Activators indirectly modulate the protein's activity through their interactions with various cellular pathways that influence eIF2α's phosphorylation. Notably, chemicals like Salubrinal and Sephin1, by inhibiting eIF2α dephosphorylation, can pave the way for increased eIF2S3 function.

In contrast, chemicals such as ISRIB, by enhancing eIF2B activity, counteract the inhibitory effects of eIF2α phosphorylation, thus indirectly facilitating eIF2S3's role in protein synthesis initiation. Moreover, ER stress inducers like Tunicamycin and Thapsigargin trigger pathways that influence eIF2 signaling, and by extension, eIF2S3's function.

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Salubrinal

405060-95-9sc-202332
sc-202332A
1 mg
5 mg
$34.00
$104.00
87
(2)

Inhibits dephosphorylation of eIF2α; can promote eIF2S3 function in the context of protein synthesis initiation.

ISRIB

1597403-47-8sc-488404
10 mg
$300.00
1
(0)

Enhances eIF2B activity, counteracting eIF2α phosphorylation effects; can indirectly boost eIF2S3 function.

Tunicamycin

11089-65-9sc-3506A
sc-3506
5 mg
10 mg
$172.00
$305.00
66
(3)

Induces ER stress and eIF2α phosphorylation; can affect eIF2S3 activity indirectly via the unfolded protein response.

Thapsigargin

67526-95-8sc-24017
sc-24017A
1 mg
5 mg
$136.00
$446.00
114
(2)

ER stress inducer, leading to eIF2α phosphorylation; can influence eIF2S3 activity within the protein synthesis machinery.

AICAR

2627-69-2sc-200659
sc-200659A
sc-200659B
50 mg
250 mg
1 g
$65.00
$280.00
$400.00
48
(2)

AMPK activator; through AMPK pathway, can indirectly affect eIF2S3-mediated protein synthesis initiation.

Guanabenz acetate

23256-50-0sc-203590
sc-203590A
sc-203590B
sc-203590C
sc-203590D
100 mg
500 mg
1 g
10 g
25 g
$102.00
$468.00
$832.00
$4162.00
$7283.00
2
(2)

Enhances eIF2α phosphorylation via inhibiting its dephosphorylation; influences eIF2S3's role in translation initiation.

Halofuginone

55837-20-2sc-507290
100 mg
$1775.00
(0)

Activates amino acid starvation response, influencing eIF2 signaling; can indirectly impact eIF2S3.