GPX4 Protein, Human (U73S, His)
目录号 : GC27256GPX4 蛋白, Human (U73S, His) 是重组的 GPX4 蛋白,由 E. coli 表达,带有 N-6*His 标签。GPX4 蛋白, Human (U73S, His)
Sample solution is provided at 25 µL, 10mM.
GPX4 是一种关键的抗氧化过氧化物酶,能够直接还原磷脂氢过氧化物(包括膜和脂蛋白中的形式)(By similarity)。它还可还原胆固醇氢过氧化物和胸腺嘧啶氢过氧化物(By similarity),在通过防止膜脂质过氧化来保护细胞免受氧化损伤中起关键作用(By similarity)。GPX4 是抑制铁死亡(ferroptosis)所必需的,这是一种由铁依赖性脂质活性氧积累导致的非凋亡性细胞死亡(PubMed:24439385)。活性位点的硒代半胱氨酸(Sec)相较于半胱氨酸(Cys)对生命至关重要:它提供了抗过度氧化的能力并防止细胞发生铁死亡(By similarity)。Sec 的存在也对特定类型的 parvalbumin 阳性中间神经元的存活至关重要,从而防止致命性癫痫发作(By similarity)。GPX4 可能通过保护细胞免受摄入的脂质氢过氧化物毒性发挥作用(By similarity),同时对正常精子发育和雄性生育能力(By similarity)以及感光细胞的成熟和存活(By similarity)必不可少。在 T 细胞对病毒和寄生虫感染的反应中,GPX4 通过防止 T 细胞铁死亡并支持其扩增发挥作用(By similarity)。此外,GPX4 作为血小板中的谷胱甘肽过氧化物酶参与花生四烯酸代谢(PubMed:11115402),并可还原由 15-脂氧合酶形成的氢过氧酯脂质,从而下调细胞 15-脂氧合酶通路(By similarity)。它还能还原脂肪酸衍生的氢过氧化物(PubMed:11115402,PubMed:36608588)以及小分子可溶性氢过氧化物(如 H2O2、枯烯氢过氧化物和叔丁基氢过氧化物)(PubMed:17630701,PubMed:36608588)。
Purity | Greater than 90 % as determined by reducing SDS-PAGE. | Source | E. coli |
Phycical Appearance | Lyophilized powder | Shipping Condition | Room temperature in continental US; may vary elsewhere. |
Synonyms | PHGPx; Glutathione peroxidase 4; GPx-4; GSHPx-4 | ||
Amino Acid Sequence | CASRDDWRCARSMHEFSAKDIDGHMVNLDKYRGFVCIVTNVASQSGKTEVNYTQLVDLHARYAECGLRILAFPCNQFGKQEPGSNEEIKEFAAGYNVKFDMFSKICVNGDDAHPLWKWMKIQPKGKGILGNAIKWNFTKFLIDKNGCVVKRYGPMEEPLVIEKDLPHYF | ||
Apparent Molecular Weight | Approximately 26 kDa. | ||
Stability | Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage. | ||
Endotoxin Level | <1 EU/μg, determined by LAL method. | ||
Reconstitution | It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. | ||
Formulation | Lyophilized from a 0.22 μm filtered solution of PBS, 6% Trehalose, pH 7.4. |
Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.