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70663

Millipore

蛋白酶K,冻干

Highly active serine protease that exhibits broad cleavage specificity on native and denatured proteins and is widely used in the purification of DNA and RNA.

同義詞:

蛋白酶 K 来源于林伯氏白色念球菌, 肽链内切酶

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About This Item

CAS號碼:
酶委員會編號:
MDL號碼:
分類程式碼代碼:
12352202
NACRES:
NA.85

品質等級

形狀

solid

分子量

28.93 kDa

製造商/商標名

Novagen®

儲存條件

OK to freeze

技術

DNA extraction: suitable

運輸包裝

wet ice

儲存溫度

2-8°C

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一般說明

蛋白酶K是从真菌林伯氏白色念球菌中分离出的高活性28,904-Da丝氨酸蛋白酶。该酶对天然和变性蛋白质具有广泛的切割特异性,广泛用于DNA和RNA的纯化。在变性剂如SDS(1%)和高温(50~60°C)存在下,其活性增加。对于蛋白质去除和酶灭活,推荐的工作浓度为50-100 µg/mL,对于组织处理,推荐的工作浓度为2 mg/mL。蛋白酶K冻干粉可制备成20 mg/ml的水溶液,并在-20°C下分装储存。该酶也可作为即用型浓缩储备液(600 mAU/ml),在大多数应用中可方便常规使用。1 mg蛋白酶K相当于30 mAU(AU=Anson单位)。Novagen蛋白酶K产品不含可检测的DNase和RNase

應用

在分离DNA和RNA的过程中,用于核酸酶的蛋白水解失活。
用于去除内毒素结合的阳离子蛋白,如溶菌酶和核糖核酸酶A。
据报道,其可用于分离肝、酵母和绿豆线粒体
用于测定酶在细胞膜上的定位
用于石蜡包埋组织切片的处理,暴露用于抗体标记的抗原结合位点。
用于可传播海绵状脑病(TSE)研究中朊病毒脑组织样本蛋白的消化。

生化/生理作用

蛋白酶K是一种稳定且具有高活性的丝氨酸蛋白酶。晶体和分子结构研究证据表明该酶属于枯草素家族,具有活性位点催化三联体(Asp39-His69-Ser224)。它在一系列广泛的环境中均稳定:pH,缓冲盐,去污剂(SDS)以及温度。 在0.1-0.5% SDS存在的情况下,蛋白酶K可保持活性,在不损害分离DNA完整性的前提下,可以消化DNA制剂中的多种蛋白质和核酸酶。

警告

毒性:有害(C)

單位定義

1 AU(AU=Anson单位)定义为在37°C、pH 7.5下每分钟从酪蛋白中释放1.0 µmol(181 µg)酪氨酸的酶量。

法律資訊

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

象形圖

Health hazardExclamation mark

訊號詞

Danger

危險分類

Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3

標靶器官

Respiratory system

儲存類別代碼

11 - Combustible Solids

水污染物質分類(WGK)

WGK 1

閃點(°F)

Not applicable

閃點(°C)

Not applicable


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