Key Specifications Table
|Empirical Formula||CAS #|
Pricing & Availability
An invalid quantity was specified. The product quantity has been adjusted.
|412512-25MG||Glass bottle||25 mg||
|Overview||A cell-permeable coumarin o-hydroxyaldehyde that inhibits IRE1 RNase activity in a time- and dose-dependent manner (IC50 = 550 and 45 nM, respectively, with 0 and 16 min drug preincubation in RNA cleavage assays) by covalently targeting IRE1 Lys907 via Schiff base formation, effectively preventing ER stress-induced site-specific mRNA splicing as well as RIDD (Regulated IRE1-Dependent Degradation) mRNA degradation (IC50 = 6.9 and 4.1 µM, respectively, against Xbp1 splicing and Scara3 degradation) in MEF cultures following Tunicamycin (Cat. No. 654380) treatment. Comparing to STF083010 (Cat. No. 412510), 4μ8C is also shown to inhibit IRE1 autophosphorylation in cell-free assays via Schiff base formation with IRE1 Lys599 in the absence of ADP, however cellular nucleotide prevents 4μ8C from targeting IRE1 Lys599 intracellularly.|
|Synonyms||8-Formyl-7-hydroxy-4-methylcoumarin, 7-Hydroxy-4-methyl-2-oxo-2H-chromene-8-carbaldehyde, ER-to-Nucleus Signaling 1 Inhibitor III, Inositol-Reguiring Protein 1 Inhibitor III|
|References||Cross, B.C.S., et al. 2012. Proc. Natl. acad. Sci. USA 109, E869.|
|Structure formula Image|
|Purity||≥95% by HPLC|
|Safety Information according to GHS|
|Product Usage Statements|
|Packaged under inert gas||Packaged under inert gas|
|Cross, B.C.S., et al. 2012. Proc. Natl. acad. Sci. USA 109, E869.|
Note that this data sheet is not lot-specific and is representative of the current specifications for this product. Please consult the vial label and the certificate of analysis for information on specific lots. Also note that shipping conditions may differ from storage conditions.