1. Signaling Pathways
  2. Cell Cycle/DNA Damage
  3. Eukaryotic Initiation Factor (eIF)

Eukaryotic Initiation Factor (eIF)

Eukaryotic initiation factors (eIFs) are proteins involved in the initiation phase of eukaryotic translation. These proteins help stabilize the formation of the functional ribosome around the start codon and also provide regulatory mechanisms in translation initiation.

Eukaryotic initiation factor 2B (eIF2B) is a guanine nucleotide-exchange factor which mediates the exchange of GDP (bound to initiation factor eIF2) for GTP, thus regenerating the active [eIF2.GTP] complex that is required for peptide-chain initiation. The activity of eIF2B is a key control point for eukaryotic protein synthesis and is altered in response to viral infection, hormones, nutrients, growth factors and certain stresses.

Eukaryotic translation initiation factor 4E (eIF4E) is best known for its function in the initiation of protein synthesis on capped mRNAs in the cytoplasm. Eukaryotic initiation factor (elF) 4A functions as a subunit of the initiation factor complex elF4F, which mediates the binding of mRNA to the ribosome.

Eukaryotic Initiation Factor (eIF) Related Products (35):

Cat. No. Product Name Effect Purity
  • HY-112654
    GCN2iB
    Inhibitor 99.81%
    GCN2iB is an ATP-competitive inhibitor of a serine/threonine-protein kinase general control nonderepressible 2 (GCN2), with an IC50 of 2.4 nM.
  • HY-19356
    Rocaglamide
    Inhibitor 99.34%
    Rocaglamide (Roc-A) is isolated from the genus Aglaia and can be used for coughs, injuries, asthma and inflammatory skin diseases. Rocaglamide is a potent inhibitor of NF-κB activation in T-cells. Rocaglamide is a potent and selective heat shock factor 1 (HSF1) activation inhibitor with an IC50 of ~50 nM. Rocaglamide inhibits the function of the translation initiation factor eIF4A. Rocaglamide also has anticancer properties in leukemia.
  • HY-100877
    GCN2-IN-1
    Inhibitor ≥98.0%
    GCN2-IN-1 (A-92) is a potent general control nonderepressible 2 kinase (GCN2) inhibitor with an IC50 of <0.3 μM in the enzyme assay and an IC50 of 0.3-3 μM in the cell assay.
  • HY-13251
    Silvestrol
    Inhibitor 98.11%
    Silvestrol is a eukaryotic translation initiation factor 4A (eIF4A) inhibitor isolated from Agave americana Linn.. Silvestrol induces autophagy and caspase-mediated apoptosis.
  • HY-112163
    Zotatifin
    Inhibitor 99.58%
    Zotatifin (eFT226) is a potent, selective, and well-tolerated eIF4A inhibitor. Zotatifin promotes eIF4A binding to specific mRNA sequences with recognition motifs in the 5’-UTRs (IC50=2 nM) and interferes with the assembly of the eIF4F initiation complex. Zotatifin shows robust antiviral effects, it effectively reduces viral infectivity by inhibiting SARS-CoV-2 NP protein biogenesis (IC90=37 nM). Zotatifin induces cell apoptosis.
  • HY-33838
    eIF4A3-IN-8
    Inhibitor 99.98%
    eIF4A3-IN-8 is a selective ATP-competitive eukaryotic initiation factor 4A3 (eIF4A3) inhibitor. eIF4A3-IN-8 can serve as a valuable chemical probe to elucidate the detailed function of eIF4A3 and EJC (exon junction complex).
  • HY-101991
    ML291
    Activator
    ML291 is a UPR (unfolded protein response)-inducing sulfonamidebenzamide. ML291 overwhelms the adaptive capacity of the UPR and induces apoptosis in a variety of solid cancer models. ML291 can activate the PERK/eIF2a/CHOP (apoptotic) arm of the UPR and reduce leukemic cell burden.
  • HY-147831
    EIF2α activator 1
    Activator
    EIF2α activator 1 (Compound 40) is an activator of eukaryotic initiation factor 2 alpha (eIF2α) phosphorylation. EIF2α activator 1 increases the expression level of eIF2α downstream proteins, ATF and CHOP. EIF2α activator 1 exhibits antiproliferative activity againist K562 and PBMC cells with IC50s of 4.00 and 19.3 μM, respectively.
  • HY-19831
    4EGI-1
    Inhibitor 99.91%
    4EGI-1 is an inhibitor of eIF4E/eIF4G interaction, with a Kd of 25 μM against eIF4E binding.
  • HY-136453
    CR-1-31-B
    Inhibitor 98.23%
    CR-1-31-B is a synthetic rocaglate and a potent eIF4A inhibitor. CR-1-31-B exhibits powerful inhibitory effects over eIF4A by perturbing the interaction between eIF4A and RNA, sequentially impeding initiation during protein synthesis. CR-1-31-B perturbs association of Plasmodium falciparum eIF4A (PfeIF4A) with RNA. CR-1-31-B induces apoptosis of neuroblastoma and gallbladder cancer cells.
  • HY-130240
    GCN2-IN-6
    Inhibitor 99.03%
    GCN2-IN-6 (Compound 6d) is a potent, and orally available GCN2 inhibitor confirmed by in-house enzymatic (IC50 of 1.8 nM) and cellular assays (IC50 of 9.3 nM). GCN2-IN-6 is also a eIF2α kinase PERK inhibitor with an IC50 of 0.26 nM (in enzymatic assay) and 230 nM (in cells).
  • HY-14427
    4E1RCat
    Inhibitor 99.10%
    4E1RCat is an inhibitor of cap-dependent translation, and inhibits eIF4E:eIF4GI interaction, with an IC50 an of ∼4 μM.
  • HY-101785
    eIF4A3-IN-2
    Inhibitor 99.77%
    eIF4A3-IN-2 is a highly selective and noncompetitive eukaryotic initiation factor 4A-3 (eIF4A3) inhibitor with an IC50 of 110 nM.
  • HY-108666
    ATPγS tetralithium salt
    Chemical ≥98.0%
    ATPγS (tetralithium salt) is a substrate for the nucleotide hydrolysis and RNA unwinding activities of eukaryotic translation initiation factor eIF4A.
  • HY-101513
    eIF4A3-IN-1
    Inhibitor 99.70%
    eIF4A3-IN-1 (compound 53a) is a selective eukaryotic initiation factor 4A3 (eIF4A3) inhibitor (IC50=0.26 μM; Kd=0.043 μM), which binds to a non-ATP binding site of eIF4A3 and shows significant cellular nonsense-mediated RNA decay (NMD) inhibition at 10 and 3 μM and can be as a probe for further study of eIF4A3, the exon junction complex (EJC), and NMD.
  • HY-19560
    SBI-0640756
    Inhibitor 99.76%
    SBI-0640756 (SBI-756) is an inhibitor of eIF4G1 and disrupts the eIF4F complex.
  • HY-125021
    2BAct
    Activator 98.70%
    2BAct is a highly selective, and orally active eIF2B (eukaryotic initiation factor 2B) activator with an EC50 of 33 nM. 2BAct prevents neurological defects caused by a chronic integrated stress response. 2BAct is able to penetrate the central nervous system (CNS). 2BAct displays improved solubility and pharmacokinetics relative to eIF2B activator ISRIB (HY-12495).
  • HY-16366
    Briciclib
    Inhibitor 99.63%
    Briciclib (ON 014185) is a derivative of ON 013100, and has the potential in targeting eIF4E for solid cancers.
  • HY-19831A
    (Z)-4EGI-1
    Inhibitor 98.01%
    (Z)-4EGI-1 is the Z-isomer of 4EGI-1 and is an inhibitor of eIF4E/eIF4G interaction and of translation initiation. (Z)-4EGI-1 effectively binds to eIF4E with an IC50 of 43.5 μM and a Kd value of 8.74 μM. (Z)-4EGI-1 has anticancer activity.
  • HY-100733
    4E2RCat
    Inhibitor ≥98.0%
    4E2RCat is an inhibitor of eIF4E-eIF4G interaction with an IC50 of 13.5 μM.