E-64
mRNA synthesis
In vitro transcription of capped mRNA with modified nucleotides and Poly(A) tail
Tyramide Signal Amplification (TSA)
TSA (Tyramide Signal Amplification), used for signal amplification of ISH, IHC and IC etc.
Phos Binding Reagent Acrylamide
Separation of phosphorylated and non-phosphorylated proteins without phospho-specific antibody
Cell Counting Kit-8 (CCK-8)
A convenient and sensitive way for cell proliferation assay and cytotoxicity assay
SYBR Safe DNA Gel Stain
Safe and sensitive stain for visualization of DNA or RNA in agarose or acrylamide gels.
Inhibitor Cocktails
Protect the integrity of proteins from multiple proteases and phosphatases for different applications.
E-64(L-反式-环氧琥珀酰肽类化合物)是一种特异性的半胱氨酸蛋白酶抑制剂,从曲霉菌(Aspergillus)的培养物中分离获得。E-64可以抑制papain、ficin和bromelains [1]。
据报道,E-64可以抑制另外两种哺乳动物半胱氨酸蛋白酶:cathepsin L3和来自人乳腺癌组织的蛋白酶,也可以抑制来自鸡肌肉组织的钙依赖性蛋白酶calpain [5]。抑制数据的双倒数曲线显示,E-64与底物没有竞争性 [1]。环氧琥珀酰部分的光学异构不会影响E-64对papain的抑制活性 [6,7]。E-64最实际的应用是papain相关半胱氨酸蛋白酶的活性位点滴定(active-site titration),可用于确定酶浓度。
参考文献:
1. A. J. BARRETT, A. A. KEMBHAVI, L-trans-Epoxysuccinyl-leucylamido(4-guanidino)butane (E-64) and its analogues as inhibitors of cysteine proteinases including cathepsins B, H and L. Biochem. J. (1982) 201, 189-198.
2. Hanada, K., Tamai, M., Yamagishi, M., Ohmura, S., Sawada, J. & Tanaka, I. (1978c) Agric. Biol. Chem. 42, 523-528
3. Towatari, T., Tanaka, K., Yoshikawa, D. & Katunuma, N. (1978).J. Biochem. (Tokyo) 84, 659-671.
4. Mort, J. S., Recklies, A. D. & Poole, A. R. (1980) Biochim. Biophys. Acta 614, 134-143.
5. Sugita, H., Ishiura, S., Suzuki, K. & Imahori, K. (1980) J. Biochem. (Tokyo) 87, 339-341.
6. Hanada, K., Tamai, M., Morimoto, S., Adachi, T.,Ohmura, S., Sawada, J. & Tanaka, I. (1978a) Agric. Biol. Chem. 42, 537-541.
7. Hanada, K., Tamai, M., Ohmura, S., Sawada, J., Seki, T.& Tanaka, I. (1978b)Agric. Biol. Chem. 42, 529-536.
8. Knight, C. G. (1980) Biochem. J. 189,447-453.
9. Takio, K., Towatari, T., Katunuma, N. & Titani, K.(1980) Biochem. Biophys. Res. Commun. 97, 340-346
10. Bender, M. L., Begue-Canton, M. L., Blakeley, R. L.,Brubacher, L. J., Feder, J., Gunter, C. R., Kezdy, F. J.,Killheffer, J. V., Marshall, T. H., Miller, C. G., Roeske,R. W. & Stoops, J. K. (1966) J. Am. Chem. Soc. 88,5890-5913
- 1. Cliff J. Luke, Stephanie Markovina, et al. "Lysoptosis is an evolutionarily conserved cell death pathway moderated by intracellular serpins." Commun Biol. 2022 Jan 12;5(1):47. PMID: 35022507
- 2. Zhijun Liu, Himani Nailwal, et al. "A class of viral inducer of degradation of the necroptosis adaptor RIPK3 regulates virus-induced inflammation." Immunity. 2021 Feb 9;54(2):247-258.e7. PMID: 33444549
- 3. Dheilly E, Battistello E, et al. "Cathepsin S Regulates Antigen Processing and T Cell Activity in Non-Hodgkin Lymphoma." Cancer Cell. 2020;37(5):674-689.e12. PMID: 32330455
- 4. Blass G, Levchenko V, et al. "Chronic cathepsin inhibition by E-64 in Dahl salt-sensitive rats." Physiol Rep. 2016 Sep;4(17). pii: e12950. PMID: 27597769
- 5. Ying Long, Xuri Zhang, et al. "Initial events in the breakthrough of the epithelial barrier of the small intestine by Angiostrongylus cantonensis." Arch Biol Sci. 2016;68(2):375-383
Physical Appearance | A solid |
Storage | Store at -20°C |
M.Wt | 357.41 |
Cas No. | 66701-25-5 |
Formula | C15H27N5O5 |
Solubility | ≥49.1 mg/mL in H2O; ≥53.6 mg/mL in DMSO; ≥55.2 mg/mL in EtOH |
Chemical Name | (2S,3S)-3-[[(2S)-1-[4-(diaminomethylideneamino)butylamino]-4-methyl-1-oxopentan-2-yl]carbamoyl]oxirane-2-carboxylic acid |
SDF | Download SDF |
Canonical SMILES | CC(C)CC(C(=O)NCCCCN=C(N)N)NC(=O)C1C(O1)C(=O)O |
运输条件 | 蓝冰运输或根据您的需求运输。 |
一般建议 | 不同厂家不同批次产品溶解度各有差异,仅做参考。若实验所需浓度过大至产品溶解极限,请添加助溶剂助溶或自行调整浓度。溶液形式一般不宜长期储存,请尽快用完。 |
细胞实验[1]: | |
细胞系 |
H-59和M-27细胞 |
溶解方法 |
在DMSO中的溶解度 ≥53.6 mg/mL。为了获得更高的浓度,可以将离心管在37°C加热10分钟和/或在超声波浴中震荡一段时间。原液可以在-20°C以下储存几个月。 |
反应条件 |
10 μg/mL;48 h |
应用 |
E-64以剂量依赖的方式抑制H-59细胞的侵袭,在10 μg/mL浓度时达到97%的最大抑制,是无毒性的。用包被7.5 μg/滤波器IV型胶原的过滤器测得细胞迁移仅减少25%,表明在缺乏基底膜屏障时,半胱氨酸蛋白酶在细胞迁移中发挥更加次要的作用。然而,E-64对M-27细胞的侵袭没有显著影响,甚至在高达100 μg/mL时。 |
动物实验[2]: | |
动物模型 |
Wistar系大鼠 |
剂量 |
1 mg/100 g体重;腹腔注射 |
应用 |
在注射E-64后1小时杀死动物,测定溶酶体中cathepsin B和cathepsin L的活性。结果表明,E-64抑制cathepsin B和cathepsin L的活性。 |
注意事项 |
请测试所有化合物在室内的溶解度,实际溶解度和理论值可能略有不同。这是由实验系统的误差引起的,属于正常现象。 |
References: [1] Navab R, Mort J S, Brodt P. Inhibition of carcinoma cell invasion and liver metastases formation by the cysteine proteinase inhibitor E-64. Clinical & experimental metastasis, 1997, 15(2): 121-129. [2] Hashida S, TOWATARI T, KOMINAMI E, et al. Inhibitions by E-64 derivatives of rat liver cathepsin B and cathepsin L in vitro and in vivo. Journal of biochemistry, 1980, 88(6): 1805-1811. |
E-64是一种天然的、有效的和不可逆的半胱氨酸蛋白酶抑制剂,作用于cathepsins K、S和L,IC50值分别为1.4、4.1和2.5 nM。. | ||||||
靶点 | cathepsins K | cathepsins S | cathepsins L | |||
IC50 | 1.4nM | 4.1nM | 2.5nM |
质量控制和MSDS
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