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形式
lyophilized powder
质量水平
比活
400-2,000 units/mg protein
纯化方式
affinity chromatography
包含
dithioerythritol as preservative
组成
Protein, ~5% Lowry
溶解性
H2O: soluble 0.95-1.05 mg/mL, clear to hazy
UniProt登记号
异质活性
ATPase <0.2%
储存温度
−20°C
基因信息
Escherichia coli K12 ... glnA(948370)
一般描述
L-Glutamine Synthetase from bacteria shows dodecameric structure comprising of 12 active sites. Each active site termed bifunnel, has an ATP and glutamate binding sites. The dodecamer is stabilized by two hexameric rings.
应用
L-Glutamine Synthetase from Escherichia coli has been used in the synthesis of methylglutamine from methylammonium in E coli and in the glutamine synthetase protection activity of human thioredoxin peroxidase enzyme, AOE372.
L-Glutamine synthetase may be used for the purification of proteases from Escherichia coli.
生化/生理作用
L-glutamine synthetase catalyzes the condensation of L-glutamate and ammonia to L-glutamine. It is a degradative enzyme for glutamic acid.
Nitrogen starvation dictates the expression of the glutamine synthetase (GS) gene in E. coli. GS plays a key role in ammonia assimilation in bacteria. Adenylylation of GS is catalyzed by adenylyltransferase. Adenylylation of GS modulates its catalytic functionality resulting in glutamine limitation in E coli.
谷氨酸降解酶
单位定义
One unit will convert 1.0 μmole of L-glutamate to L-glutamine in 15 min at pH 7.1 at 37 °C.
外形
Contains potassium phosphate, sodium citrate and magnesium acetate buffer salts
警示用语：
Danger
危险声明
预防措施声明
危险分类
Resp. Sens. 1
WGK
WGK 1
闪点(°F)
Not applicable
闪点(°C)
Not applicable
个人防护装备
Eyeshields, Gloves, type N95 (US)
法规信息
常规特殊物品
Reversible Adenylylation of Glutamine Synthetase Is Dynamically Counterbalanced during Steady-State
Okano H, et al.
Journal of molecular biology, 404(1), 522-536 (2010)
Regulatory role for a novel human thioredoxin peroxidase in NF-kappaB activation
Jin DY, et al.
The Journal of Biological Chemistry, 272(49), 30952-30961 (1997)
Kamal Krishna Singh et al.
Plant cell reports, 32(2), 183-193 (2012-10-17)
KEY MESSAGE : The regulation of GS isoforms by WD was organ specific. Two GS isoforms i.e. OsGS1;1 and OsGS2 were differentially regulated in IR-64 (drought-sensitive) and Khitish (drought-tolerant) cultivars of rice. Water deficit (WD) has adverse effect on rice
Peritumoral hyperplasia of the liver: a response to portal vein invasion by hypervascular neoplasms.
Thomas Arnason et al.
Histopathology, 62(3), 458-464 (2012-12-18)
Several cases of focal nodular hyperplasia (FNH) or similar hyperplastic lesions have been reported adjacent to hepatic neoplasms, including hepatocellular carcinoma, epithelioid haemangioendothelioma and hepatoblastoma. We refer to this hyperplastic response as peritumoral hyperplasia (PTH). Here, we report eight cases
Purification of a protease from Escherichia coli with specificity for oxidized glutamine synthetase.
J E Roseman et al.
The Journal of biological chemistry, 262(5), 2101-2110 (1987-02-15)
A soluble Escherichia coli protease has been identified and purified to homogeneity. The protease cleaves glutamine synthetase which has been modified by mixed function oxidation; native glutamine synthetase is not a substrate. Using [14C]glutamine synthetase as a substrate (prepared by
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