KI696
目录号 : GC31321
KI696是一种干扰Keap1/NRF2相互作用的高亲和力探针。
Cas No.:1799974-70-1
Sample solution is provided at 25 µL, 10mM.
;)
,-1-7$$$37316672.jpg');)
;)
;)
$$$36806353.jpg');)
;33(7)%EF%BC%9A546-561$$$37156877.jpg');)
;)
;)
;)
%201124-1138.$$$35908550.jpg');)
%20766-780.$$$37100057.jpg');)
%20418-432.$$$36893736.jpg');)
%EF%BC%9A-240-255.$$$35108512.jpg');)
533-545$$$36543525.jpg');)
%201-13.$$$36600053.jpg');)
;)
Quality Control & SDS
- View current batch:
- Purity: >99.00%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Kinase experiment: | Inhibition of the Kelch domain-NRF2 interaction is determined using a fluorescence polarisation-based competition assay in a black 384-well microplate. Each well contained 2 nM 5’-TAMRA-NRF2 peptide (AFFAQLQLDEETGEFL) and 7 nM human KEAP1 (residues 321-609) in 50 µL of assay buffer (50 mM Tris-HCl pH 8.0, 100 mM NaCl, 5 mM MgCl2, 2 mM 3-[(3-Cholamidopropyl)dimethylammonio]-1-propanesulfonate (CHAPS), 1 mM DTT, 0.005% BSA, 1% DMSO). After 1 hour at room temperature, fluorescence polarisation (excitation 485 nm/emission 520 nm) is measured using a BMG Pherastar FS plate reader. IC50 values are determined by fitting the data to a four parameter logistic fit[1]. |
Cell experiment: | BEAS-2B cells are plated in 384 well black clear-bottomed plates and are incubated overnight (37°C, 5% CO2). On day 2, the plates are centrifuged and 50 nL of compound (KI696) or controls are added to the cells for 48 hours. On day 4, the medium is aspirated from the plate and crude cell lysates are made by using 1X lysis buffer with Complete, Mini, EDTA-free Protease Inhibitor. After lysis, the plates are incubated for 20 minutes at room temperature and the MTT cocktail is prepared for measurement of NQO1 activity. The samples are analyzed on an Envision plate reader, reading absorbance at 570 nm for five individual readings with 10 minute intervals. Product formation is measured kinetically and the pEC50 of NQO1 specific activity induction is calculated by plotting the change in absorbance versus log [compound] followed by 4-parameter fitting[1]. |
Animal experiment: | Rats[1]To examine the effect of KI696 under conditions of oxidative stress, rats are administered KI696 at 35 µmol/kg (the approximate average EC50 value for gene expression) by IV infusion over 6 hours, and after 24 hours are exposed to ozone (1 ppm for 3 hours). Fifteen minutes following the termination of ozone exposure, the numbers of total cells, neutrophils and mononuclear cells in the bronchoalveolar lavage (BAL) fluid are measured[1]. |
References: [1]. Davies TG, et al. Monoacidic Inhibitors of the Kelch-like ECH-Associated Protein 1: Nuclear Factor Erythroid 2-Related Factor 2 (KEAP1:NRF2) Protein-Protein Interaction with High Cell Potency Identified by Fragment-Based Discovery. J Med Chem. 2016 Apr 28;59(8):3991-4006. | |
KI696 is a high affinity probe that disrupts the Keap1/NRF2 interaction.
KI696 (compound 7) exhibits very high affinity for the KEAP1 Kelch domain (ITC Kd=1.3 nM with the exception of the organic anion transporting polypeptide 1B1 (OATP1B1) (IC50=2.5 µM), the bile salt export pump BSEP (IC50=4.0 µM), and the phosphodiesterase PDE3A (IC50=10 µM), no significant cross-reactivity is observed. No cytotoxicity is observed towards BEAS-2B cells with KI696 at concentrations up to 10 µM. KI696 increases NRF2 Nuclear Translocation in Normal Human Bronchial Epithelial cells. KI696 increases mRNA expression of the NRF2-dependent genes NQO1 and GCLM in NHBE cells transfected with the non-targeting siRNA, while NRF2 gene silencing significantly decreases compound activity. KI696 increases NQO1 Activity in an NRF2-Dependent Manner. Treatment with tBHP clearly has a detrimental effect on cell health and appearance while pre-treatment of cells with 1 µM KI696 before the exposure to tBHP maintained cell morphology consistent with the DMSO control. KI696 Induces the Expression of NRF2-Regulated Genes in COPD patient-derived bronchial epithelial cells[1].
KI696 induces the expression of each of the Nqo1, Ho-1, Txnrd1, Srxn1, Gsta3, Gclc genes in a dose-dependent manner, with maximum increases over vehicle controls of 37-(Nqo1), 17-(Ho-1), 9-(Txnrd1), 28-(Srxn1), 15-(Gsta3) and 13-fold (Gclc) occurring at the 50 µmol/kg dose. EC50 values are 44.0, 25.7, 42.6, 33.8, 28.4, and 44.1 µmol/kg, respectively, giving an average EC50 value of 36.4±3.4 µmol/kg. KI696 attenuates ozone-Induced pulmonary inflammation. KI696 restores ozone-induced depletion of lung GSH levels. KI696 is administered to rats at 10, 35 and 50 µmol/kg by IV infusion, resulting in steady state compound concentrations in the blood of 407±44 nM, 946±50 nM and 1437±186 nM, respectively, over the 6 hour infusion period. Exposure to ozone 24 hours post-dose produces a significant depletion in lung levels of the anti-oxidant molecule, GSH, which is restored by KI696 in a dose-dependent manner[1].
[1]. Davies TG, et al. Monoacidic Inhibitors of the Kelch-like ECH-Associated Protein 1: Nuclear Factor Erythroid 2-Related Factor 2 (KEAP1:NRF2) Protein-Protein Interaction with High Cell Potency Identified by Fragment-Based Discovery. J Med Chem. 2016 Apr 28;59(8):3991-4006.
| Cas No. | 1799974-70-1 | SDF | |
| Canonical SMILES | COC1=C(N2C)C(N=N2)=CC([C@H](C3=CC(CN(C[C@H]4C)S(=O)(C5=CC=CC=C5O4)=O)=C(C)C=C3)CC(O)=O)=C1 | ||
| 分子式 | C28H30N4O6S | 分子量 | 550.63 |
| 溶解度 | DMSO : 125 mg/mL (227.01 mM) | 储存条件 | Store at -20°C |
| General tips | 请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。 储备液的保存方式和期限：-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。 为了提高溶解度，请将管子加热至37℃，然后在超声波浴中震荡一段时间。 |
||
| Shipping Condition | 评估样品解决方案：配备蓝冰进行发货。所有其他可用尺寸：配备RT，或根据请求配备蓝冰。 | ||
| 制备储备液 | |||
 |
1 mg | 5 mg | 10 mg |
| 1 mM | 1.8161 mL | 9.0805 mL | 18.161 mL |
| 5 mM | 0.3632 mL | 1.8161 mL | 3.6322 mL |
| 10 mM | 0.1816 mL | 0.9081 mL | 1.8161 mL |
| 第一步：请输入基本实验信息（考虑到实验过程中的损耗，建议多配一只动物的药量） | ||||||||||
| 给药剂量 | mg/kg |  |
动物平均体重 | g | |
每只动物给药体积 | ul | |
动物数量 | 只 |
| 第二步：请输入动物体内配方组成（配方适用于不溶于水的药物；不同批次药物配方比例不同，请联系GLPBIO为您提供正确的澄清溶液配方） | ||||||||||
| % DMSO % % Tween 80 % saline | ||||||||||
| 计算重置 | ||||||||||
计算结果:
工作液浓度： mg/ml；
DMSO母液配制方法： mg 药物溶于 μL DMSO溶液（母液浓度 mg/mL，
体内配方配制方法：取 μL DMSO母液，加入 μL PEG300，混匀澄清后加入μL Tween 80，混匀澄清后加入 μL saline，混匀澄清。
1. 首先保证母液是澄清的；
2.
一定要按照顺序依次将溶剂加入，进行下一步操作之前必须保证上一步操作得到的是澄清的溶液，可采用涡旋、超声或水浴加热等物理方法助溶。
3. 以上所有助溶剂都可在 GlpBio 网站选购。
Exploring the target scope of KEAP1 E3 ligase-based PROTACs
Targeted protein degradation (TPD) uses small molecules to recruit E3 ubiquitin ligases into the proximity of proteins of interest, inducing ubiquitination-dependent degradation. A major bottleneck in the TPD field is the lack of accessible E3 ligase ligands for developing degraders. To expand the E3 ligase toolbox, we sought to convert the Kelch-like ECH-associated protein 1 (KEAP1) inhibitor KI696 into a recruitment handle for several targets. While we were able to generate KEAP1-recruiting degraders of BET family and murine focal adhesion kinase (FAK), we discovered that the target scope of KEAP1 was narrow, as targets easily degraded using a cereblon (CRBN)-recruiting degrader were refractory to KEAP1-mediated degradation. Linking the KEAP1-binding ligand to a CRBN-binding ligand resulted in a molecule that induced degradation of KEAP1 but not CRBN. In sum, we characterize tool compounds to explore KEAP1-mediated ubiquitination and delineate the challenges of exploiting new E3 ligases for generating bivalent degraders.
Characterization of RecA424 and RecA670 proteins from Deinococcus radiodurans
RecA protein is considered to be the most important participant in the radiation resistance of Deinococcus radiodurans. However, it is still unclear how RecA contributes to the resistance. In this study, we identified a new recA mutation (recA424) in the DNA-repair deficient mutant strain KI696, the phenotype of which is remarkably different from mutant strain rec30 carrying recA670. The properties of the gene products from the recA mutants were compared. recA424 could not complement the deficiency in Escherichia coli RecA, as found for recA670. In vitro, neither RecA424 nor RecA670 could promote DNA strand exchange under conditions in which wild-type RecA promoted the reaction, indicating that both RecA424 and Rec670 are defective in recombination activity. RecA424 promoted the autocleavage reaction of LexA in vitro, whereas RecA670 did not. The intracellular LexA level in KI696 was decreased following gamma-irradiation. However, the LexA level in strain rec30 was constant irrespective of irradiation. These results indicate that RecA424 retains co-protease activity, whereas RecA670 does not. While strain rec30 is extremely radiation sensitive, strain KI696 is only slightly sensitive. Together, these observations suggest that the co-protease activity rather than the recombination activity of RecA contributes to radiation resistance in D. radiodurans.