eIF4H Activators
eIF4H activators comprise a category of chemical compounds that modulate the activity of the eukaryotic initiation factor 4H (eIF4H), a protein involved in the initiation phase of mRNA translation. The process of translation initiation is a crucial step in protein synthesis where ribosomes are guided to the correct starting point on an mRNA molecule. eIF4H functions as an auxiliary factor that enhances the helicase activity of eIF4A, which is an ATP-dependent RNA helicase. This helicase activity is necessary for the unwinding of secondary structures in the 5' untranslated region (5' UTR) of mRNAs, which can be a significant barrier to the binding of the 43S pre-initiation complex. By destabilizing these secondary structures, eIF4H activators effectively facilitate the scanning process that ribosomes undergo to locate the start codon of the mRNA, thereby influencing the efficiency of protein translation initiation.
The molecular mechanisms through which eIF4H activators exert their action involve direct or indirect interactions with eIF4H or its associated partners, leading to an increased functional capacity of the initiation complex. These compounds can alter the conformation of eIF4H or affect its affinity for RNA or eIF4A, thereby modulating its role in the translation initiation process. The precise biochemical pathways and interactions that these activators participate in can vary, depending on their chemical structure and the specific nature of their engagement with the translation initiation machinery. By influencing the activity of eIF4H, these activators play a role in modulating the overall rates of protein synthesis within a cell, which is a fundamental aspect of cellular biology with implications for the regulation of gene expression and the maintenance of cellular homeostasis. Their action on the molecular level is a subject of interest for understanding the intricate control mechanisms governing protein synthesis and the various factors that contribute to its regulation.
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| Product Name | CAS # | Catalog # | QUANTITY | Price | Citations | RATING |
|---|---|---|---|---|---|---|
Forskolin | 66575-29-9 | sc-3562 sc-3562A sc-3562B sc-3562C sc-3562D | 5 mg 50 mg 1 g 2 g 5 g | $78.00 $153.00 $740.00 $1413.00 $2091.00 | 73 | |
Forskolin activates adenylyl cyclase, leading to an increase in cAMP levels. Elevated cAMP activates PKA, which can phosphorylate and thus enhance the activity of eIF4H by promoting its interaction with eIF4E, facilitating the initiation of cap-dependent translation. | ||||||
Bisindolylmaleimide I (GF 109203X) | 133052-90-1 | sc-24003A sc-24003 | 1 mg 5 mg | $105.00 $242.00 | 36 | |
Bisindolylmaleimide I is a potent and specific inhibitor of protein kinase C (PKC). By inhibiting PKC, it may reduce phosphorylation of inhibitory substrates, thereby potentially releasing eIF4H from inhibitory constraints and enhancing its role in mRNA unwinding during translation initiation. | ||||||
(−)-Epigallocatechin Gallate | 989-51-5 | sc-200802 sc-200802A sc-200802B sc-200802C sc-200802D sc-200802E | 10 mg 50 mg 100 mg 500 mg 1 g 10 g | $43.00 $73.00 $126.00 $243.00 $530.00 $1259.00 | 11 | |
EGCG is a catechin found in green tea, known to inhibit several protein kinases. Inhibition of these kinases could reduce phosphorylation on inhibitory sites of proteins involved in translation initiation, potentially increasing the activity of eIF4H in the mRNA cap recognition process. | ||||||
Puromycin | 53-79-2 | sc-205821 sc-205821A | 10 mg 25 mg | $166.00 $322.00 | 436 | |
Puromycin causes premature chain termination during protein synthesis. This leads to the release of incomplete polypeptide chains, which could create a demand for increased translational initiation, indirectly enhancing the functional activity of eIF4H. | ||||||
Spermidine | 124-20-9 | sc-215900 sc-215900B sc-215900A | 1 g 25 g 5 g | $57.00 $607.00 $176.00 | ||
Spermidine is a polyamine that stabilizes ribosomal structure and function. By supporting ribosome integrity, spermidine can indirectly augment eIF4H activity by ensuring efficient translation initiation, which is part of eIF4H's role. | ||||||
Ionomycin | 56092-82-1 | sc-3592 sc-3592A | 1 mg 5 mg | $78.00 $270.00 | 80 | |
Ionomycin is a calcium ionophore that raises intracellular calcium levels. Increased calcium may activate calcium-dependent protein kinases, such as CaMKII, which can phosphorylate and activate factors involved in translation initiation, potentially enhancing eIF4H activity. | ||||||
Insulin | 11061-68-0 | sc-29062 sc-29062A sc-29062B | 100 mg 1 g 10 g | $156.00 $1248.00 $12508.00 | 82 | |
Insulin activates the PI3K/Akt/mTOR pathway, which leads to the phosphorylation and activation of multiple proteins involved in translation initiation. This activation can indirectly enhance eIF4H's role in the assembly of the pre-initiation complex and the start of mRNA translation. | ||||||
Rapamycin | 53123-88-9 | sc-3504 sc-3504A sc-3504B | 1 mg 5 mg 25 mg | $63.00 $158.00 $326.00 | 233 | |
Rapamycin inhibits the mTORC1 complex, leading to a reduction in phosphorylation of 4E-BP1, a repressor of eIF4E. This can indirectly enhance the activity of eIF4H by facilitating the release of eIF4E to form the eIF4F complex, which is critical for cap-dependent translation initiation. | ||||||
Taxol | 33069-62-4 | sc-201439D sc-201439 sc-201439A sc-201439E sc-201439B sc-201439C | 1 mg 5 mg 25 mg 100 mg 250 mg 1 g | $41.00 $74.00 $221.00 $247.00 $738.00 $1220.00 | 39 | |
Paclitaxel stabilizes microtubules and can enhance the mitotic block. This may lead to an increased demand for protein synthesis and indirectly enhance eIF4H activity, which is vital for the initiation of translation. | ||||||
Resveratrol | 501-36-0 | sc-200808 sc-200808A sc-200808B | 100 mg 500 mg 5 g | $80.00 $220.00 $460.00 | 64 | |
Resveratrol activates SIRT1, which deacetylates proteins involved in the regulation of translation. Deacetylation of these proteins can enhance their activity, potentially leading to increased functional activity of eIF4H in the process of translation initiation. | ||||||