1. Signaling Pathways
  2. Cell Cycle/DNA Damage
  3. IRE1


Inositol requiring enzyme 1

Inositol-requiring enzyme 1 (IRE1) is a bifunctional serine/threonine kinase and endoribonuclease that is a major mediator of the unfolded protein response (UPR) during endoplasmic reticulum (ER) stress. It represents a potential therapeutic target for a number of diseases associated with endoplasmic reticulum stress.

IRE1 is the only identified ER stress sensor in yeast and essential for UPR in animals and plants. As an ER transmembrane protein, IRE1 monitors ER homeostasis through an ER luminal stress-sensing domain and triggers UPR through a cytoplasmic kinase domain and an RNase domain. Upon ER stress, IRE1 RNase is activated through conformational change, autophosphorylation, and higher order oligomerization. Mammalian IRE1 initiates diverse downstream signaling of the UPR either through unconventional splicing of the transcription factor Xbp-1 or and through posttranscriptional modifications via Regulated IRE1-Dependent Decay (RIDD) of multiple substrates.

Cat. No. Product Name Effect Purity
  • HY-10255A
    Inhibitor 98.96%
    Sunitinib (SU 11248) is a multi-targeted receptor tyrosine kinase inhibitor with IC50s of 80 nM and 2 nM for VEGFR2 and PDGFRβ, respectively. Sunitinib, an ATP-competitive inhibitor, effectively inhibits autophosphorylation of Ire1α by inhibiting autophosphorylation and consequent RNase activation.
  • HY-19707
    Inhibitor 98.78%
    4μ8C (IRE1 Inhibitor III) is a small-molecule inhibitor of IRE1α.
  • HY-15845
    Inhibitor ≥98.0%
    STF-083010 is a specific IRE1α inhibitor. STF-083010 inhibits Ire1 endonuclease activity, without affecting its kinase activity, after endoplasmic reticulum stress.
  • HY-19708
    Inhibitor 99.86%
    KIRA6 is an advanced small-molecule IRE1α RNase kinase inhibitor with an IC50 of 0.6 µM. KIRA6 can trigger an apoptotic response.
  • HY-10255
    Sunitinib Malate
    Inhibitor 99.91%
    Sunitinib Malate (SU 11248 Malate) is a multi-targeted receptor tyrosine kinase inhibitor with IC50s of 80 nM and 2 nM for VEGFR2 and PDGFRβ, respectively. Sunitinib Malate, an ATP-competitive inhibitor, effectively inhibits autophosphorylation of Ire1α by inhibiting autophosphorylation and consequent RNase activation.
  • HY-139212
    IXA6 is a novel IRE1/XBP1s activator, and can induce IRE1 RNase activity.
  • HY-145425
    PAIR2 is a potent and selective partial antagonist of IRE1α RNase. PAIR2 can completely occupy IRE1α’s ATP-binding site in cells and block the ability of a potent KIRA to inhibit XBP1 splicing.
  • HY-145419
    IRE1α kinase-IN-4
    IRE1α kinase-IN-4 (compound 6) is a potent IRE1α inhibitor with an Ki of 140 nM. IRE1α kinase-IN-4 is the ATP-competitive ligands of IRE1α.
  • HY-114368
    Inhibitor 99.74%
    Kira8 (AMG-18) is a mono-selective IRE1α inhibitor that allosterically attenuates IRE1α RNase activity with an IC50 of 5.9 nM.
  • HY-103248
    Inhibitor 99.90%
    Toyocamycin (Vengicide) is an adenosine analog produced by Streptomyces diastatochromogenes, acts as an XBP1 inhibitor. Toyocamycin blocks RNA synthesis and ribosome function, and induces apoptosis. Toyocamycin affects IRE1α-XBP1 pathway, and inhibits XBP1 mRNA cleavage with an IC50 value of 80 nM with affecting IRE1α auto-phosphorylation. Toyocamycin specifically inhibits CDK9 with an IC50 value of 79 nM.
  • HY-104040
    Inhibitor 98.49%
    MKC8866, a salicylaldehyde analog, is a potent, selective IRE1 RNase inhibitor with an IC50 of 0.29 μM in human vitro. MKC8866 strongly inhibits Dithiothreitol-induced X-box-binding protein 1-spliced (XBP1s) expression with an EC50 of 0.52 μM and unstresses RPMI 8226 cells with an IC50 of 0.14 μM. MKC8866 inhibits IRE1 RNase in breast cancer cells leading to the decreased production of pro-tumorigenic factors and it can inhibits prostate cancer (PCa) tumor growth.
  • HY-139214
    Inhibitor 99.16%
    IXA4 is a highly selective, non-toxic IRE1/XBP1s activator. IXA4 activates IRE1/XBP1s signaling without globally activating the unfolded protein response (UPR) or other stress-responsive signaling pathways (e.g., the heat shock response or oxidative stress response). IXA4 reduces secretion of APP through IRE1 activation.
  • HY-17537
    Inhibitor 99.90%
    APY29, an ATP-competitive inhibitor, is an allosteric modulator of IRE1α which inhibits IRE1α autophosphorylation by binding to the ATP-binding pocket with IC50 of 280 nM. APY29 acts as a ligand that allosterically activates IRE1α adjacent RNase domain.
  • HY-U00459
    Inhibitor 98.48%
    GSK2850163 is a novel inhibitor of inositol-requiring enzyme-1 alpha (IRE1α) which can inhibit IRE1α kinase activity and RNase activity with IC50s of 20 and 200 nM, respectively.
  • HY-19710
    Inhibitor 99.68%
    MKC3946 is a potent IRE1α inhibitor, used for cancer research.
  • HY-107400
    B I09
    Inhibitor 99.60%
    B I09 is an IRE-1 RNase inhibitor, with an IC50 of 1230 nM.
  • HY-136735
    IRE1α kinase-IN-1
    Inhibitor 99.44%
    IRE1α kinase-IN-1 is a highly selective IRE1α (ERN1) inhibitor, with an IC50 of 77 nM. IRE1α kinase-IN-1 displays 100-fold selectivity for IRE1α over the IRE1β isoform. IRE1α kinase-IN-1 inhibits ER stress-induced IRE1α oligomerization and autophosphorylation, and also inhibits IRE1α RNase activity (IC50=80 nM).
  • HY-12399
    Inhibitor 98.36%
    MKC9989 is a Hydroxy aryl aldehydes (HAA) inhibitor and also inhibits IRE1α with an IC50 of 0.23 to 44 μM.
  • HY-107371
    Inhibitor 99.55%
    6-Bromo-2-hydroxy-3-methoxybenzaldehyde (NSC95682) is an IRE-1α inhibitor with an IC50 of 0.08 μM, extracted from patent WO 2008154484 A1, IRE-lα inhibitor compound 3-5.
  • HY-U00460
    3,6-DMAD hydrochloride
    Inhibitor ≥99.0%
    3,6-DMAD hydrochloride, an acridine derivative, is a potent IRE1α-XBP1s pathway inhibitor. 3,6-DMAD hydrochloride promotes IL-6 secretion via the IRE1α-XBP1s pathway. 3,6-DMAD hydrochloride inhibits IRE1α oligomerization and endoribonuclease (RNase) activity. 3,6-DMAD hydrochloride can be used for research of cancer.
Cat. No. Product Name / Synonyms Species Source