IRE-3 --- IRE1a Modulator

Catalog No. size PriceQuantity
M60167-2S 2mg solid $129
M60167-10S 10 mg solid $510Unavailable


IRE-3 is a highly potent and selective small molecule modulator of IRE1α. Under endoplasmic reticulum stress, unfolded protein accumulation leads to activation of the endoplasmic reticulum transmembrane kinase/endoRNase (RNase) IRE1α. IRE1α oligomerizes, autophosphorylates and initiates splicing of XBP1 mRNA, thus triggering the unfolded protein response (UPR). Interestingly, IRE-3 inhibits the XBP1 mRNA splicing through binding to the IRE1α ATP-binding site, even under endoplasmic reticulum stress. It shows dose-dependent reduction of IRE1α kinase autophosphorylation in vitro with IC50~3.12 µM. IRE-3 can also block enzymatic activities of IRE1α in INS-1 rat insulinoma cell lines. As dysregulation of the UPR has been implicated in a variety of cell degenerative and neoplastic disorders, small molecule modulators of IRE1α, such as IRE-3 and APY-29, serve as useful tools to understand the UPR's role in pathophysiology and to develop drugs for endoplasmic reticulum stress-related diseases.

Product information

CAS Number: 1414938-21-8

Molecular Weight: 504.51

Formula: C27H23F3N6O

Chemical Name: 1-(4-(8-amino-3-isopropylimidazo[1,5-a]pyrazin-1-yl)naphthalen-1-yl)-3-(3-(trifluoromethyl)phenyl)urea

Smiles: CC(C)C1=NC(=C2C(N)=NC=CN21)C1=CC=C(NC(=O)NC2=CC(=CC=C2)C(F)(F)F)C2=CC=CC=C21


InChi: InChI=1S/C27H23F3N6O/c1-15(2)25-35-22(23-24(31)32-12-13-36(23)25)20-10-11-21(19-9-4-3-8-18(19)20)34-26(37)33-17-7-5-6-16(14-17)27(28,29)30/h3-15H,1-2H3,(H2,31,32)(H2,33,34,37)

Technical Data

Appearance: Solid Power.

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: DMSO up to 50 mM

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined.

HS Tariff Code: 382200

How to use

In Vitro:

IRE-3 was used at 10-20 µM in vitro and in cellular assays.


  1. Wang L, et al. Divergent allosteric control of the IRE1α endoribonuclease using kinase inhibitors. (2012) Nat Chem Biol. 8(12):982-9.

Products are for research use only. Not for human use.


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