产品说明

包装

5, 25 mg in glass bottle

生化/生理作用

4μ8C 是水杨醛衍生物，其抑制作用靶向 RNase(核糖核酸酶)结构域中的 K907 赖氨酸残基，影响 IRE1αRNase 活性。体外 分析证明 4μ8C 能够在高糖水平抑制胰岛素的释放。
4μ8C 是内质网跨膜蛋白 IRE1 的强效抑制剂，介导未折叠蛋白反应。4μ8C 抑制调节的 IRE1 依赖性降解 (RIDD) 和 XBP1 mRNA 对内质网 (ER) 应激的非常规剪接，但对 IRE1 的激酶活性没有影响。

特点和优势

这种化合物是基因调控研究的特色产品。点击此处发现更多特色基因调控产品。在sigma.com/discover-bsm可了解更多关于生物活性小分子的其他研究领域。

基本信息

产品性质

安全信息

产品说明

一般描述

A cell-permeable coumarin o-hydroxyaldehyde compound that inhibits IRE1 RNase activity in a time- and dose-dependent manner (IC₅₀ = 550, 230, 180, 100, and 45 nM, respectively, with 0, 2, 4, 8, 16, min drug preincubation in FRET-based 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. Also demonstrated to inhibit ER capacity expansion (Effective conc. 32 µM) and amylase secretion (IC₅₀<2 µM) upon stress induction by Dexamethasone (Cat. No. 265005) treatment in rat AR42J tumoral acinar pancreatic cells. Structural analysis reveals that the reduced water accessibility to Lys907 in IRE1 native conformation accounts for the unusual stability of Lys907 Schiff base formation and forms the basis of selective IRE1 RNase inhibition by 4μ8C and STF083010 (Cat. No. 412510). Although 4μ8C, but not STF083010, is also shown to inhibit IRE1 autophosphorylation by Schiff base formation with IRE1 Lys599 in the absence of ADP, cellular nucleotide prevents 4μ8C from targeting IRE1 Lys599 and inhibiting IRE1 kinase activity intracellularly.
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.

包装

25 mg in Glass bottle
Packaged under inert gas

生化/生理作用

Cell permeable: yes
Primary Target
IRE1
Reversible: yes

警告

Toxicity: Standard Handling (A)

重悬

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 6 months.

其他说明

Cross, B.C.S., et al. 2012. Proc. Natl. acad. Sci. USA109, E869.

法律信息

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

基本信息

产品性质

安全信息

基本信息