葡萄糖-6-磷酸脱氢酶(英语:glucose-6-phosphate dehydrogenase,EC 1.1.1.49)是一种以NAD+或NADP+为受体、作用于供体CH-OH基团上的氧化还原酶。这种酶能催化以下酶促反应:
- D-葡萄糖-6-磷酸 + NADP+ D-葡萄糖酸-1,5-内酯-6-磷酸 + NADPH + H+
葡萄糖-6-磷酸脱氢酶主要参与磷酸戊糖途径,也能缓慢地作用在β-D-葡萄糖等其他糖类上。这种酶可由其底物葡萄糖-6-磷酸激活,如果人类表达葡萄糖-6-磷酸脱氢酶的基因G6PD有缺陷,将会导致葡萄糖-6-磷酸脱氢酶缺乏症,引发非免疫性溶血性贫血。葡萄糖-6-磷酸脱氢酶存在于众多生物细胞内,高等植物拥有数种葡萄糖-6-磷酸脱氢酶的蛋白异构体(protein isoform),它们分布于细胞质基质、和过氧化物酶体等细胞结构中。[1]
参考文献
- ↑ Corpas FJ et al.. A dehydrogenase-mediated recycling system of NADPH in plant peroxisomes. Biochem. J.. 1998, 330 (7): 777–784.
- Vulliamy T, Beutler E, Luzzatto L. Variants of glucose-6-phosphate dehydrogenase are due to missense mutations spread throughout the coding region of the gene.. Hum. Mutat.. 1993, 2 (3): 159–67. doi:10.1002/humu.1380020302. PMID 8364584.
- Mason PJ. New insights into G6PD deficiency.. Br. J. Haematol.. 1996, 94 (4): 585–91. PMID 8826878.
- Wajcman H, Galactéros F. [Glucose 6-phosphate dehydrogenase deficiency: a protection against malaria and a risk for hemolytic accidents]. C. R. Biol.. 2004, 327 (8): 711–20. PMID 15506519.
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