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重要文件

SAE0067

Sigma-Aldrich

SUMO蛋白酶

His tagged recombinant protein, lyophilized powder

同義詞:

ULP, 小泛素样修饰蛋白酶, 泛素同源结构域蛋白PIC1, 泛素样特异性蛋白酶1, 泛素样蛋白酶

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About This Item

分類程式碼代碼:
12352204
NACRES:
NA.54

重組細胞

expressed in E. coli

品質等級

化驗

≥95% (SDS-PAGE)

形狀

lyophilized powder

分子量

27 kDa

運輸包裝

ambient

儲存溫度

−20°C

相關類別

一般說明

SUMO蛋白酶是一类通用的酶,其特异性去除翻译后蛋白修饰(PTM)——所谓的小泛素相关修饰物(SUMO),属于泛素和/或泛素样蛋白(UBL)的翻译后蛋白修饰类。通常称为“SUMO蛋白酶”的酶是来自酿酒酵母(Saccharomyces cerevisiae)的泛素样特异性蛋白酶1(Ulp1)。这是这类酶中第一个被分离出来的。SUMO蛋白酶以“无痕”方式特异性切割SUMO部分。SUMO蛋白酶识别泛素样SUMO结构域的三级结构,并在SUMO结构域的C末端,水解x-Gly-Gly-x序列中Gly-Gly键后的肽键。除了切割天然SUMO修饰的蛋白质外,SUMO蛋白酶还用于切割重组SUMO融合蛋白。SUMO结构域是已经的溶解度增强融合标签,用于重组蛋白表达组氨酸标签也可以作为纯化标签添加到SUMO结构域的N末端。该 SUMO蛋白酶产物携带 6x 组氨酸标签。因此,在消化反应之后,它可以与裂解的SUMO结构域一起容易地去除
SUMO蛋白酶在很宽的温度范围(2-30°C),离子强度范围(0-400 mM NaCl)和pH 范围(6-8.5)内都有活性。然而,其活性可能因底物和条件而变化。研究人员需要优化其特定的反应条件。作为初步建议,每 mg 靶蛋白可以使用20 单位的SUMO蛋白酶,在30℃ 下,1 小时,或在2-8℃ 下过夜。然后可以通过 SDS-PAGE 估计切割效率。如果需要,然后可以调整 SUMO蛋白酶的量。SUMO蛋白酶在还原剂存在下效果更好,例如0.5-2mM DTT。反应混合物中的DTT可显着提高切割效率,尤其是在较长时间的孵育期间
将重悬的产物储存在-20°C。 建议在100μL 水或 50% 甘油(v/v)中重悬酶,并补充 1 mM DTT。水/DTT中的溶液应以冷冻等分试样储存,以避免冻融循环,这会对蛋白酶活性产生不利影响。

單位定義

在30℃ 下,一单位酶可在1小时内,切割 90%的100pmol SUMO-GST。

儲存類別代碼

11 - Combustible Solids

水污染物質分類(WGK)

WGK 2

閃點(°F)

Not applicable

閃點(°C)

Not applicable


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