产品说明
一般描述
Aminopeptidase I from Streptomyces griseus is a thermostable enzyme with Glu131 and Tyr246 as key active site residues.
应用
Aminopeptidase I from Streptomyces griseus has been used:
- to test the biochar exposure effect on the enzyme activity
- in circular dichroism (CD) spectroscopy studies
- as a positive control in p-nitroanilide degradation assay
包装
0.1 mg in serum bottle
Package size based on protein content.
生化/生理作用
Aminopeptidase I may also be used as a reagent in the assay of endoprotease activities with a synthetic substrate in a two-stage assay. In the first stage, the endoprotease cleaves a peptide, such as Z-Y-X-Leu-p-nitroanilide, with the X, Y, and Z residues being chosen according to the specificity of the endoprotease.
Aminopeptidase I from S. griseus has a fairly broad specificity, being able to remove the N-terminal residue of most proteins, except where the penultimate residue is an imino acid. It contains two Zn2+ binding sites. Aminopeptidase I from S. griseus is inhibited by 1,10-phenanthroline and is activated six-fold by Ca2+, which also stabilizes it against heat inactivation. This monomeric zinc metalloprotein has an isoelectric point (pI) of 5.4.
单位定义
One unit will hydrolyze 1.0 μmole of
外形
Contains calcium acetate
制备说明
Reconstitute in 20 mM tricine, pH 8.0, with 0.05% bovine serum albumin. Dilute the enzyme with the reconstitution buffer to 0.15-0.3 U/mL for a working concentration. Solutions should be prepared fresh prior to use.
其他说明
Endopeptidase contaminant: Not more than: 0.01 U/mg protein (as μmole tyrosine equivalent per min released from casein.)
基本信息
| 酶学委员会(EC)编号 | 3.4.11.22 ( BRENDA | IUBMB ) |
| EC 号 | 232-874-6 |
| MDL编号 | MFCD00166325 |
| NACRES | NA.54 |
产品性质
| 形式 | lyophilized powder |
| 质量水平 | 200 |
| specific activity | ≥200 units/mg protein |
| 分子量 | 21 kDa by gel filtration 33 kDa by SDS-PAGE |
| 组成 | Protein, 40-60% Lowry |
| 储存温度 | −20℃ |
安全信息
| 象形图 |   |
| 警示用语： | Danger |
| 危险声明 | H315 - H319 - H334 - H335 |
| 预防措施声明 | P261 - P264 - P271 - P302 + P352 - P304 + P340 + P312 - P305 + P351 + P338 |
| 危险分类 | Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3 |
| 靶器官 | Respiratory system |
| 储存分类代码 | 11 - Combustible Solids |
| WGK | WGK 1 |
| 闪点(F) | Not applicable |
| 闪点(C) | Not applicable |
| 个人防护装备 | Eyeshields, Gloves, type N95 (US) |
