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L-Glutamine Synthetase from Escherichia coli

L-谷氨酰胺合成酶 来源于大肠杆菌

品牌
Sigma-Aldrich
CAS
9023-70-5
货号
G1270
规格纯度
lyophilized powder, 400-2,000 units/mg protein
参考价格
7162.78 *本价格含增值税费
促销
数量
-+
产品介绍:

产品说明

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 may be used for the purification of proteases from Escherichia coli.
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.

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 ℃.

外形

Contains potassium phosphate, sodium citrate and magnesium acetate buffer salts

基本信息

酶学委员会(EC)编号6.3.1.2 ( BRENDA | IUBMB )
MDL编号MFCD00131463
NACRESNA.26

产品性质

形式lyophilized powder
质量水平200
specific activity400-2,000 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P0A9C5
异质活性ATPase <0.2%
储存温度−20℃
Gene InformationEscherichia coli K12 ... glnA(948370)

安全信息

储存分类代码11 - Combustible Solids
WGKWGK 3
闪点(F)Not applicable
闪点(C)Not applicable
个人防护装备Eyeshields, Gloves, type N95 (US)

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