SMILES string
[n]2(c3ncncc3nc2)[C@@H]1O[C@@H]([C@H]([C@H]1O)O)CO
InChI key
MRWXACSTFXYYMV-FDDDBJFASA-N
InChI
1S/C10H12N4O4/c15-2-6-7(16)8(17)10(18-6)14-4-13-5-1-11-3-12-9(5)14/h1,3-4,6-8,10,15-17H,2H2/t6-,7-,8-,10-/m1/s1
form
lyophilized powder
specific activity
≥10 units/mg protein
mol wt
~120 kDa
composition
Protein, 40-80%
storage temp.
−20°C
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General description
核苷磷酸化酶对核苷的生物合成很重要。
核苷磷酸化酶是三聚体,分子量为100 kDa左右。每个单体由疏水腔中混合β的薄片芯、侧面八个α-螺旋和一个嘌呤结合区组成。
等电点:4.1 +/- 0.1
米氏常数:6.4 x 10-5M(肌苷),3.2x10-4M (Pi)
抑制剂:对氯汞苯甲酸,SDS,Hg++,Ag+最佳pH:7.5-8.0
最适温度: 65oC
pH稳定性: pH 6.0 - 9.0 (30oC,16小时)
热稳定性:低于60oC(pH 7.7, 30分钟)
米氏常数:6.4 x 10-5M(肌苷),3.2x10-4M (Pi)
抑制剂:对氯汞苯甲酸,SDS,Hg++,Ag+最佳pH:7.5-8.0
最适温度: 65oC
pH稳定性: pH 6.0 - 9.0 (30oC,16小时)
热稳定性:低于60oC(pH 7.7, 30分钟)
Application
来自微生物的核苷磷酸化酶已被用于:
- 合成腺苷用戊磷酸变位酶检测
- 7-甲基硫鸟苷向7-甲基硫代鸟嘌呤的转变
- 冻干棉花植物样品中细胞分裂素的合成
核苷磷酸化酶被用于偶联酶系统以测量蛋白质去磷酸化。
Biochem/physiol Actions
催化下列反应:嘌呤核苷+磷酸盐=嘌呤+α-D-核糖1-磷酸
核苷磷酸化酶催化核苷衍生物的合成。
该酶可以和黄嘌呤氧化酶(XTO-212)和尿酸酶(UAO-201,UAO-211)一起使用,用于酶法测定无机磷、5′-核苷酸酶和腺苷脱氨酶。研究表明嘌呤核苷磷酸化酶能够进行嘌呤脱氧-和核糖核苷的磷酰基水解和合成。 研究发现膜相关核苷磷酸化酶可能以膜对侧上的碱基和核糖-1-P 结合位点进行跨膜定向。
Physical form
冻干粉末,含有葡萄糖酸钾、甘露醇和EDTA
Other Notes
一个酶活性单位是指在pH 7.4、25°C时,每分钟使 1.0 μmole肌苷发生磷酸分解而形成次黄嘌呤和核糖1-磷酸所需的酶量。
存储类别
11 - Combustible Solids
wgk
WGK 3
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
Enzymatic synthesis of nucleosides by nucleoside phosphorylase co-expressed in Escherichia coli
Ding, Q., et al.
Journal of Zhejiang University. Science, 11, 880-888 (2010)
Hanan M A Moustafa et al.
Analytical biochemistry, 501, 75-81 (2016-03-01)
Phosphopentomutase (PPM) catalyzes the interconversion of α-D-(deoxy)-ribose 1-phosphate and α-D-(deoxy)-ribose 5-phosphate. We developed a coupled or uncoupled enzymatic assay with an enzyme nucleoside phosphorylase for determining PPM activities on D-ribose 5-phosphate at a broad temperature range from 30 to 90
A second purine nucleoside phosphorylase in Escherichia coli K-12. II. Properties of xanthosine phosphorylase and its induction by xanthosine
Hmmer-Jespersen, K.
Molecular Genetics and Genomics, 179, 341-348 (1980)
E C Keystone et al.
Annals of the rheumatic diseases, 68(6), 789-796 (2008-12-11)
The phase III GO-FORWARD study examined the efficacy and safety of golimumab in patients with active rheumatoid arthritis (RA) despite methotrexate therapy. Patients were randomly assigned in a 3 : 3 : 2 : 2 ratio to receive placebo injections
Enzymatic synthesis of nucleosides by nucleoside phosphorylase co-expressed in Escherichia coli
Ding QB, et al.
Journal of Zhejiang University. Science. B, 11(11), 880-888 (2010)
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