type
Type XXI
form
powder
specific activity
≥15 units/mg solid
mol wt
~50 kDa
storage temp.
−20°C
Quality Level
General description
等电点:8.7
抑制剂:二异丙基氟磷酸盐,EDTA
最适pH:> = 12
最适温度:60oC
pH稳定性:pH 5.0 - 11.5(25oC,24小时)
热稳定性:低于50oC(pH 8.3,15分钟)
抑制剂:二异丙基氟磷酸盐,EDTA
最适pH:> = 12
最适温度:60oC
pH稳定性:pH 5.0 - 11.5(25oC,24小时)
热稳定性:低于50oC(pH 8.3,15分钟)
Application
链霉蛋白酶E可用于降解柞蚕丝素蛋白膜。
至少包含三种蛋白水解活性的混合物,其中包含细胞外丝氨酸蛋白酶。通常,丝氨酸蛋白酶显示出广泛的底物特异性,而这被视为通过分子中由一个Asp、一个His和Ser残基组成的活性位点所介导的。该酶能够选择水解谷氨酸或天冬氨酸的羧基侧的肽键。
蛋白酶通常用于核酸的分离过程,通过补充0.2%十二烷基硫酸钠和10 mM EDTA并孵育0.5-3.0小时。
该酶可用于不溶性蛋白质的蛋白水解和蛋白结构研究。来自 灰色链霉菌 和 链霉菌 的蛋白酶已经在一项研究中用于鉴定残留物71(作为拓扑特异性差异的关键残留物)。 蛋白酶也已用于研究蛋白酶作为链霉素生产中副产物的产生。
通过在80 °C以上加热15-20分钟以完全灭活。
Biochem/physiol Actions
碱性蛋白酶在pH 11.0下的活性约为蛋白酶在pH 7.5和37℃的常规测定条件下的两倍。相比之下,P5147型XIV蛋白酶在pH 11.0,30℃条件下仅有约25%的活性。
Physical form
该酶比已知碱性蛋白酶在更高的pH范围内更具活性,即使在0.2N NaOH溶液中也可显示出蛋白水解活性。该酶可用于不溶性蛋白质的蛋白水解和蛋白结构研究。
Preparation Note
收集自S.Sp的培养基肉汤中
Other Notes
在pH 11.0、30 °C条件下,一个单位每分钟可水解酪蛋白并产生相当于1.0 μmole (181 μg)酪氨酸的多肽。
signalword
Danger
hcodes
Hazard Classifications
Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
存储类别
11 - Combustible Solids
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
法规信息
常规特殊物品
此项目有
Paola Taddei et al.
Biomacromolecules, 7(1), 259-267 (2006-01-10)
In this study, Antheraea pernyi silk fibroin (Ap-SF) films were incubated with Protease Type XXI from Streptomyces griseus, at 37 degrees C, to investigate the degradation behavior in an in vitro model system. The enzyme-resistant fractions of Ap-SF films and
Yoshiko Uesugi et al.
Biochimica et biophysica acta, 1814(10), 1295-1304 (2011-07-20)
We recently identified residue 71 of two homologous serine proteases from Streptomyces omiyaensis (SOT) and Streptomyces griseus (SGT) as a crucial residue for differences in their topological specificities, i.e. recognition of a distinct three-dimensional structure. To study the role of
W W Epstein et al.
Proceedings of the National Academy of Sciences of the United States of America, 87(19), 7352-7354 (1990-10-01)
Prenylated proteins, labeled in the isoprenoid residue by growing CHO cells in medium containing [5-3H]mevalonate, were degraded by three different proteolytic procedures, enzymatic or alkaline hydrolysis as well as hydrazinolysis. The products thus obtained were analyzed by HPLC with chemically
A Proteolytic Enzyme of Streptomyces griseus: I. Purification of a Protease of Streptomyces griseus
Nomoto, M. and Y. Narahashi
Biochemistry, 46, 653-667 (1959)
The utility of nonspecific proteases in the characterization of glycoproteins by high-resolution time-of-flight mass spectrometry.
Juhasz, P. and Martin, S.A.
International Journal of Mass Spectrometry and Ion Processes, 169-170, 217-230 (1997)
实验方案
This procedure is for informational purposes including assay Procedure, definition, and calculations for Protease
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