A direct and continuous assay for the determination of thioredoxin reductase activity in cell lysates.
A direct and continuous assay for the determination of thioredoxin reductase activity in cell lysates.
复制标题
用于测定细胞裂解物中硫氧还蛋白还原酶活性的直接连续测定。
DOI:
10.1016/j.ab.2013.08.013
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发表时间:
2013-12-01
影响因子:
2.9
通讯作者:
Heintz NH
中科院分区:
文献类型:
--
作者:
Cunniff B;Snider GW;Fredette N;Hondal RJ;Heintz NH
Thioredoxin reductase (TR) is an oxidoreductase responsible for maintaining thioredoxin in the reduced state, thereby contributing to proper cellular redox homeostasis. The C-terminal active site of mammalian TR contains the rare amino acid selenocysteine, which is essential to its activity. Alterations in thioredoxin-reductase activity due to changes in cellular redox homeostasis are found in clinical conditions such as cancer, viral infection, and various inflammatory processes, and quantification of thioredoxin-activity can therefore be a valuable indicator of clinical conditions. Here we describe a new, direct assay (termed the SC-TR assay) to determine the activity of TR based upon the reduction of selenocystine, a diselenide-bridged amino acid. Rather than being an end-point assay as is in older methods, the SC-TR assay directly monitors the continuous consumption of NADPH at 340 nm by TR as it reduces selenocystine. The SC-TR assay can be used in a cuvette using traditional spectrophotometry, or as a 96-well plate based format using a plate reader. In addition, the SC-TR assay is compatible with the use of non-ionic detergents, making it more versatile than other methods using cell lysates.
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影响因子:
5.8
作者:
Biewenga, GP;Dorstijn, MA;Bast, A
通讯作者:
Bast, A
影响因子:
3.7
作者:
Newick K;Cunniff B;Preston K;Held P;Arbiser J;Pass H;Mossman B;Shukla A;Heintz N
通讯作者:
Heintz N
DOI:
10.1165/rcmb.2011-0134oc
发表时间:
2012-01-01
影响因子:
6.4
作者:
Hristova, Milena;Spiess, Page C.;van der Vliet, Albert
通讯作者:
van der Vliet, Albert
影响因子:
7.4
作者:
Marzano, Christine;Gandin, Valentina;Rigobello, Maria Pia
通讯作者:
Rigobello, Maria Pia
影响因子:
4.5
作者:
Yang, XM;Wu, XL;Kehrer, JP
通讯作者:
Kehrer, JP