Thioredoxin 2 from Escherichia coli is not involved in vivo in the recycling process of methionine sulfoxide reductase activities.
[No authors listed]
摘要
Thioredoxins (Trx) 1 and 2, and three methionine sulfoxide reductases (Msr) whose activities are Trx-dependent, are expressed in Escherichia coli. A metB(1)trxA mutant was shown to be unable to grow on methionine sulfoxide (Met-O) suggesting that Trx2 is not essential in the Msr-recycling process. In the present study, we have determined the kinetic parameters of the recycling process of the three Msrs by Trx2 and the in vivo expression of Trx2 in a metB(1)trxA mutant. The data demonstrate that the lack of growth of the metB(1)trxA mutant on Met-O is due to low in vivo expression of Trx2 and not to the lower catalytic efficiency of Msrs for Trx2.
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基因功能
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原始数据
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文献解读
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