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表单
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
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)
法规信息
常规特殊物品
从最新的版本中选择一种：
分析证书(COA)
Lot/Batch Number
Reversible Adenylylation of Glutamine Synthetase Is Dynamically Counterbalanced during Steady-State
Okano H, et al.
Journal of molecular biology, 404(1), 522-536 (2010)
Structure-function relationships of glutamine synthetases
Eisenberg D, et al.
Biochimica et Biophysica Acta, Protein Structure and Molecular Enzymology, 1477(1-2), 122-145 (2000)
Ammonia acquisition in enteric bacteria: physiological role of the ammonium/methylammonium transport B (AmtB) protein
Soupene E, et al.
Proceedings of the National Academy of Sciences of the USA, 95(12), 7030-7034 (1998)
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)
Structural Analysis of Glutamine Synthetase from Helicobacter pylori
Joo HK, et al.
Scientific Reports, 8(1), 11657-11657 (2018)
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