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

Eukaryotic Initiation Factor (eIF)

Eukaryotic Initiation Factor (eIF)

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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.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-112654
    GCN2iB
    		Inhibitor 99.83%
    GCN2iB is an ATP-competitive inhibitor of a serine/threonine-protein kinase general control nonderepressible 2 (GCN2), with an IC50 of 2.4 nM.
    GCN2iB
  • HY-12495A
    ISRIB
    		Antagonist 98.58%
    ISRIB is a brain-penetrant inhibitor of integrated stress response (ISR). Persistent activation of the ISR has been linked to the development of several neurological disorders as ISR represses translation through inhibiting eIF2B. ISRIB inhibits the ISR by promoting the nucleotide exchange activity of eIF2B and recovering the translation, and thus can be used for neurological disorders research.
    ISRIB
  • 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.
    GCN2-IN-1
  • HY-112163
    Zotatifin
    		Inhibitor 99.69%
    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.
    Zotatifin
  • 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.
    Rocaglamide
  • HY-P10757
    DTX-P7
    		Activator
    DTX-P7 is a peptide-drug conjugate. DTX-P7, composed of Docetaxel (DTX, HY-B0011) and a heptapeptide (P7), induces unfolded protein response and subsequent apoptosis by degrading Hsp90.
    DTX-P7
  • HY-176428
    PROTAC MNK1 degrader-1
    		Inhibitor
    PROTAC MNK1 degrader-1 is a selective MNK1 PROTAC degrader with a DC50 of 11.92 nM, and a Dmax > 96% in MV4-11 cells. PROTAC MNK1 degrader-1 significantly reduces p-eIF4E (IC50: 22.07 nM), induces apoptosis, and arrests the cell cycle at the G1 phase. PROTAC MNK1 degrader-1 has potent antitumor activity. PROTAC MNK1 degrader-1 has robust antileukemic efficacy in MV4-11 xenograft mice model with acceptable drug safety. Pink: MNK1 ligand (HY-176429); Blue: CRBN ligase ligand (HY-A0003); Black: linker (HY-Y1139); CRBN + linker: HY-176430
    PROTAC MNK1 degrader-1
  • HY-148664
    eIF4E-IN-4
    		Inhibitor
    eIF4E-IN-4 (Compound 33) is a selective inhibitor of eukaryotic initiation factor 4E (eIF4E) with biochemical activity value of 95 nM. eIF4E-IN-4 inhibits cap-dependent mRNA translation with an IC50 value of 2.5 μM. eIF4E-IN-4 can be used for breast cancer, colon cancer, and head and neck cancer study.
    eIF4E-IN-4
  • HY-19831
    4EGI-1
    		Inhibitor 98.32%
    4EGI-1 is an inhibitor of eIF4E/eIF4G interaction, with a Kd of 25 μM against eIF4E binding.
    4EGI-1
  • HY-108666
    ATPγS tetralithium salt
    		Chemical ≥98.0%
    ATPγS (tetralithium salt) is a P2Y11 receptor agonist, an antioxidant and a neuroprotective agent. ATPγS (tetralithium salt) can be used as a substrate for the nucleotide hydrolysis and RNA unwinding activities of eukaryotic translation initiation factor eIF4A. ATPγS (tetralithium salt) is active in ATP hydrolysis.
    ATPγS tetralithium salt
  • HY-125021
    2BAct
    		Activator 99.31%
    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 trans-isomer (HY-12495).
    2BAct
  • HY-13251
    Silvestrol
    		Inhibitor 99.96%
    Silvestrol is a eukaryotic translation initiation factor 4A (eIF4A) inhibitor isolated from Agave americana Linn.. Silvestrol induces autophagy and caspase-mediated apoptosis.
    Silvestrol
  • HY-136453
    CR-1-31-B
    		Inhibitor 98.38%
    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.
    CR-1-31-B
  • HY-14427
    4E1RCat
    		Inhibitor 98.89%
    4E1RCat is an inhibitor of cap-dependent translation, and inhibits eIF4E:eIF4GI interaction, with an IC50 an of ～4 μM.
    4E1RCat
  • HY-130240
    GCN2-IN-6
    		Inhibitor 98.89%
    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). GCN2-IN-6 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
    GCN2-IN-6
  • HY-145974A
    m7GpppAmpG ammonium
    		Ligand 99.50%
    m7GpppAmpG ammonium (m7G(5')ppp(5')(2'OMeA)pG ammonium) is a trinucleotide 5′ end cap analog. m7GpppAmpG ammonium binds to eIF4E with a KD value of 45.6 nM. m7GpppAmpG ammonium caps RNA with a capping efficiency of 90%. m7GpppAmpG ammonium enhances mRNA stability and translation efficiency. m7GpppAmpG ammonium is used in mRNA therapeutic research.
    m7GpppAmpG ammonium
  • HY-N2279
    Kurarinone
    		Activator 99.47%
    Kurarinone is an orally active flavonoid isolated from matrine that inhibits the pathogenesis of experimental autoimmune encephalomyelitis by inhibiting cell differentiation of Th1 and Th17. Kurarinone has antitumor and anti-inflammatory activity.
    Kurarinone
  • HY-158201
    ATF4-IN-1
    		Activator 98.02%
    ATF4-IN-1 (Compound 21) is an ATF4 inhibitor and also an eIF2B activator. ATF4-IN-1 can be used in research on neurodegenerative diseases.
    ATF4-IN-1
  • HY-101785
    eIF4A3-IN-2
    		Inhibitor 99.70%
    eIF4A3-IN-2 is a highly selective and noncompetitive eukaryotic initiation factor 4A-3 (eIF4A3) inhibitor with an IC50 of 110 nM.
    eIF4A3-IN-2
  • HY-101513
    eIF4A3-IN-1
    		Inhibitor 99.96%
    eIF4A3-IN-1 is a selective eIF4A3 inhibitor (IC50: 0.26 μM; Kd: 0.043 μM) with cellular nonsense-mediated RNA decay (NMD) inhibitory activity. eIF4A3-IN-1 can specifically bind to the non-ATP binding site of eIF4A3. eIF4A3-IN-1 has anti-tumor and analgesic activities.
    eIF4A3-IN-1
Cat. No. Product Name / Synonyms Application Reactivity