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形狀
ammonium sulfate suspension
比活性
100-300 units/mg protein (biuret)
分子量
118 kDa
UniProt登錄號
異物活動
G-6-PDH, 6-PGDH, and NADPH oxidase ≤0.01%
lipoamide dehydrogenase ≤0.1%
儲存溫度
2-8°C
基因資訊
bakers yeast ... GLR1(856014)
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一般說明
谷胱甘肽还原酶(GLR1)在线粒体和细胞质中存在异构体。它和硫氧还蛋白还原酶有相同的序列,结构同源,是含有黄素的氧化还原酶。它的活性位点是由氧化还原活性二硫组成,催化活性需要NADPH。这种酶广泛存在于植物,细菌,酵母,小鼠和人类。
應用
来自烘焙′s 酵母(Saccharomyces cerevisiae) 的谷胱甘肽还原酶(GR)用于
- 使用谷胱甘肽还原酶-5,5′-二硫基双(2-硝基苯甲酸)-基酶回收实分析定量心肌组织中的谷胱甘肽含量。
- 使用略微改良的微谷胱甘肽分析,定量初情期母猪卵母细胞中的还原谷胱甘肽(GSH)
- 制备总GSSG(谷胱甘肽二硫化物)+GSH检测,然后在大鼠晶状体内所有GSSG被还原成GSH。
- 在大鼠卵母细胞内定量还原谷胱甘肽(GSH)
来自烘焙′酵母的谷胱甘肽还原酶(GR)用于:
- 谷胱甘肽分析用来确定谷胱甘肽浓度
- 作为标准产生矫正曲线
- 作为抗原测量血浆GR活性。
生化/生理作用
谷胱甘肽还原酶 IGR) 是抗氧化系统中关键的黄素酶。谷胱甘肽超氧化物酶使用还原谷胱甘肽(GSH),去除过氧化氢毒性,在这一过程中GSH会被转化成氧化谷胱甘肽(GSSG)。然后GSSG被谷胱甘肽还原酶(GR)回收变成GSH,这一过程中NADPH变成NADP+。 重生的GSH能够解更多的过氧化氢的毒。该酶使用FAD作为辅因子。GR和谷胱甘肽过氧化物酶可能在精子中作为抗氧化酶,抑制脂质过氧化。 谷胱甘肽还原酶和其他一些蛋白质有共同的结构模体,包括天冬氨酸蛋白酶、柠檬酸合成酶、EF手性分子、血红蛋白、脂质体和α/β水解酶。 GR被褪黑素激活,被报道不可逆地被一些氧自由基产生系统抑制。
谷胱甘肽(γ-谷氨酰半胱氨酸甘氨酸)是一种广泛存在的三肽硫醇,在细胞氧化压力抵抗机制中起到关键作用。谷胱甘肽还原酶(GLR1)负责还原谷胱甘肽二硫化物(GSSG),形成还原谷胱甘肽。
單位定義
一单位每分钟能够还原 1.0 μmole氧化谷胱甘肽,pH7.6,25℃。
外觀
悬浮于3.6 M (NH4)2SO4, pH 7.0,含0.1 mM二硫苏糖醇
準備報告
通过亲和层析纯化
訊號詞
Danger
危險聲明
危險分類
Resp. Sens. 1
儲存類別代碼
12 - Non Combustible Liquids
水污染物質分類(WGK)
WGK 2
閃點(°F)
Not applicable
閃點(°C)
Not applicable
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商品
Instructions for working with enzymes supplied as ammonium sulfate suspensions
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