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| 货号 (SKU) | 包装规格 | 是否现货 | 价格 | 数量 |
|---|---|---|---|---|
| R141093-100μg |
100μg |
现货 ![]() |
| |
| R141093-1mg |
1mg |
现货 ![]() |
| |
| R141093-5mg |
5mg |
现货 ![]() |
| |
| R141093-10mg |
10mg |
现货 ![]() |
|
| 产品名称 | 重组Kex2蛋白酶 |
|---|---|
| 别名 | 重组双碱性氨基酸内肽酶 |
| 英文别名 | KEX 2 | Kex2p | Kexin | KEX2 | QDS1 | SRB1 | VMA45 |
| 规格或纯度 | 无载体, GMP, 生物活性, ActiBioPure™, EnzymoPure™, ≥90%(SDS-PAGE), ≥10 units/mg |
| 生化机理 | Catalytic activity: Cleavage of -Lys-Arg-|-Xaa- and -Arg-Arg-|-Xaa- bonds to process yeast alpha-factor pheromone and killer toxin precursors. Cofactor Ca2+. Note: Binds 3 Ca2+ ions per subunit. Post-translational: O-glycosylated. |
| 产品介绍 |
Kex2蛋白酶是钙离子依赖性的蛋白水解酶,能特异性识别和切割Arg-Arg、Lys-Arg等双碱基氨基酸羧基端肽键,与胰蛋白酶不同,Kex2不能识别和切割单一碱性氨基酸即精氨酸或赖氨酸的羧基端肽键。在酵母体内Kex2蛋白酶负责加工killer toxin和α-factor的前体。Kex2蛋白酶是由毕赤酵母表达生产。酶的最适pH为9.0,最适温度为37℃。在偏酸性环境中稳定,稳定pH为5.0-6.0。Kex2蛋白酶活性不受常规的丝氨酸蛋白酶抑制剂如PMSF、TPCK所抑制。 蛋白酶:融合蛋白质量比1:20~1:1000
Kex2 is a Ca2+-dependent serine protease and cleaves at C-terminal site of Lys-Arg, Arg-Arg, Pro-Arg in pro-α,factor and killer-toxin precursors maturing, it was discovered in Saccharomyces cerevisiae.But Kex2 can’t recognize and cut a single basic amino acid,such as carboxyl end peptide bond of arginine and lysine. Recombinant Kex2 is a genetically engineered protein expressed in Pichia pastoris and purified by high pressure liquid chromatography. The optimal pH of Kex2 protease is 9.0, and the optimal temperature is 37 ℃. It is stable in buffer (pH 5.0-6.0). The activity of Kex2 is not affected by the conventional serine protease inhibitors such as PMSF, TPCK, TLCK inhibition. Protease: Fusion protein Ratio 1:20~1:1000. |
| 生物活性 | 酶比活≥10U/mg 酶活定义:在 25°C, pH 8. 0 的条件下,每分钟催化 1 μmol 的 Boc-QR R-pNA 转化为产物所需要的酶量为一个酶活单位(U)。 |
| 内毒素水平 | <0.1 EU/μg |
| 表达系统 | 毕赤酵母 |
| 种属 | 发面酵母(Baker's yeast) |
| 蛋白标签 | No tag |
| 无载体 | Yes |
| Accession # | P13134 |
| 来源 | 重组表达 |
| 预测分子量 | 80 kDa |
| SDS-PAGE | 68-92 kDa |
| 物理形态 | 冻干(Lyophilized) |
|---|---|
| 储存缓冲液 | 20mM NaAc-HAc, 2 mM Ca2+, pH 5.0~5.5. |
| 浓度 | ≥10 units/mg |
| 复溶 | 20mM NaAc-HAc, 2mM Ca2+, pH 5.0~5.5. |
| 储存温度 | -20°C储存,避免反复冻融 |
| 运输条件 | 超低温冰袋运输 |
| 稳定性与储存 | Lyophilized powder store at -20℃ for 24 months. Dissolve in buffer (20mM NaAc-HAc, 2 mM Ca2+, pH 5.0~5.5), subpackage and store at -20℃. It is recommended that it should be stored at 2~8℃ after dissolution for no more than 24 hours. Upon receipt, it is re |
| CAS编号和信息 | 99676-46-7 |
| 酶学委员会编号 | EC: 3.4.21.61 |
| 分子类型 | 酶 |
通过匹配包装上的批号来查找并下载产品的 COA,每批产品都进行了严格的验证,您可放心使用!
| 批号(Lot Number) | 证书类型 | 货号 |
|---|---|---|
| 分析证书 | R141093 | |
| 分析证书 | R141093 | |
| 分析证书 | R141093 | |
| 分析证书 | R141093 |