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硒和维生素E在动物营养中的相互节约效应,可能会因哺乳动物硫氧还蛋白还原酶是一种含硒酶这一发现而得到进一步解释。

The mutual sparing effects of selenium and vitamin E in animal nutrition may be further explained by the discovery that mammalian thioredoxin reductase is a selenoenzyme.

作者信息

Tamura T, Gladyshev V, Liu S Y, Stadtman T C

机构信息

Okayama University, Faculty of Agriculture, Japan.

出版信息

Biofactors. 1995;5(2):99-102.

PMID:8722124
Abstract

The recent discovery that mammalian thioredoxin reductase is a selenoprotein furnishes an additional explanation of the mutual sparing roles of selenium and vitamin E in cellular antioxidant systems. Thioredoxin reductases isolated from human lung adenocarcinoma cells, human Jurkat T-cells and HeLa cells contain selenocysteine which is located in a C-terminal tripeptide, -Cys-SeCys-Gly.

摘要

最近发现哺乳动物硫氧还蛋白还原酶是一种硒蛋白,这为硒和维生素E在细胞抗氧化系统中的相互节约作用提供了另一种解释。从人肺腺癌细胞、人Jurkat T细胞和HeLa细胞中分离出的硫氧还蛋白还原酶含有位于C末端三肽-Cys-SeCys-Gly中的硒代半胱氨酸。

相似文献

1
The mutual sparing effects of selenium and vitamin E in animal nutrition may be further explained by the discovery that mammalian thioredoxin reductase is a selenoenzyme.硒和维生素E在动物营养中的相互节约效应,可能会因哺乳动物硫氧还蛋白还原酶是一种含硒酶这一发现而得到进一步解释。
Biofactors. 1995;5(2):99-102.
2
Mammalian thioredoxin reductase: oxidation of the C-terminal cysteine/selenocysteine active site forms a thioselenide, and replacement of selenium with sulfur markedly reduces catalytic activity.哺乳动物硫氧还蛋白还原酶:C末端半胱氨酸/硒代半胱氨酸活性位点的氧化形成硫硒化物,用硫取代硒会显著降低催化活性。
Proc Natl Acad Sci U S A. 2000 Mar 14;97(6):2521-6. doi: 10.1073/pnas.050579797.
3
Selenocysteine-containing thioredoxin reductase in C. elegans.秀丽隐杆线虫中含硒代半胱氨酸的硫氧还蛋白还原酶
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Selenocysteine, identified as the penultimate C-terminal residue in human T-cell thioredoxin reductase, corresponds to TGA in the human placental gene.硒代半胱氨酸被确定为人T细胞硫氧还蛋白还原酶倒数第二个C末端残基,与人胎盘基因中的TGA相对应。
Proc Natl Acad Sci U S A. 1996 Jun 11;93(12):6146-51. doi: 10.1073/pnas.93.12.6146.
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Antioxidant function of thioredoxin and glutaredoxin systems.硫氧还蛋白和谷氧还蛋白系统的抗氧化功能。
Antioxid Redox Signal. 2000 Winter;2(4):811-20. doi: 10.1089/ars.2000.2.4-811.
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Thiol cofactors for selenoenzymes and their synthetic mimics.硒酶的硫醇辅因子及其合成模拟物。
Org Biomol Chem. 2008 Mar 21;6(6):965-74. doi: 10.1039/b716239a. Epub 2008 Jan 2.
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High-level expression in Escherichia coli of selenocysteine-containing rat thioredoxin reductase utilizing gene fusions with engineered bacterial-type SECIS elements and co-expression with the selA, selB and selC genes.利用与工程化细菌型硒代半胱氨酸插入序列元件的基因融合以及与selA、selB和selC基因共表达,在大肠杆菌中实现含硒代半胱氨酸的大鼠硫氧还蛋白还原酶的高水平表达。
J Mol Biol. 1999 Oct 8;292(5):1003-16. doi: 10.1006/jmbi.1999.3085.
8
Functional expression of rat thioredoxin reductase: selenocysteine insertion sequence element is essential for the active enzyme.大鼠硫氧还蛋白还原酶的功能表达:硒代半胱氨酸插入序列元件对活性酶至关重要。
Biochem J. 1999 Jun 1;340 ( Pt 2)(Pt 2):439-44.
9
Studies of an active site mutant of the selenoprotein thioredoxin reductase: the Ser-Cys-Cys-Ser motif of the insect orthologue is not sufficient to replace the Cys-Sec dyad in the mammalian enzyme.硒蛋白硫氧还蛋白还原酶活性位点突变体的研究:昆虫直系同源物的丝氨酸-半胱氨酸-半胱氨酸-丝氨酸基序不足以替代哺乳动物酶中的半胱氨酸-硒代半胱氨酸二联体。
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Heparin-binding properties of selenium-containing thioredoxin reductase from HeLa cells and human lung adenocarcinoma cells.来自HeLa细胞和人肺腺癌细胞的含硒硫氧还蛋白还原酶的肝素结合特性。
Proc Natl Acad Sci U S A. 1997 Jun 10;94(12):6138-41. doi: 10.1073/pnas.94.12.6138.

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Thioredoxin reductase inhibition reduces relaxation by increasing oxidative stress and s-nitrosylation in mouse aorta.硫氧还蛋白还原酶抑制通过增加氧化应激和 S-亚硝基化作用减少小鼠主动脉的松弛。
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Human thioredoxin reductase from HeLa cells: selective alkylation of selenocysteine in the protein inhibits enzyme activity and reduction with NADPH influences affinity to heparin.来自人宫颈癌细胞系(HeLa细胞)的人硫氧还蛋白还原酶:蛋白质中硒代半胱氨酸的选择性烷基化会抑制酶活性,并且用烟酰胺腺嘌呤二核苷酸磷酸(NADPH)还原会影响其对肝素的亲和力。
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Interleukin-1-induced nuclear factor kappa B activation is inhibited by overexpression of phospholipid hydroperoxide glutathione peroxidase in a human endothelial cell line.在人内皮细胞系中,磷脂氢过氧化物谷胱甘肽过氧化物酶的过表达可抑制白细胞介素-1诱导的核因子κB激活。
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Selenocysteine, identified as the penultimate C-terminal residue in human T-cell thioredoxin reductase, corresponds to TGA in the human placental gene.硒代半胱氨酸被确定为人T细胞硫氧还蛋白还原酶倒数第二个C末端残基,与人胎盘基因中的TGA相对应。
Proc Natl Acad Sci U S A. 1996 Jun 11;93(12):6146-51. doi: 10.1073/pnas.93.12.6146.