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- W2755232403 abstract "Methionine sulphoxide reductases (Msr) are able to reduce methionine sulfoxide to methionine and protect bacteria against reactive oxygen species (ROS). Many organisms express both methionine sulphoxide reductase A (MsrA), specific for methionine-S-sulfoxide and methionine sulphoxide reductase B (MsrB), active against methionine-R-sulfoxide. Corynebacterium glutamicum expresses MsrA, the function of which has been well defined; however, the function of MsrB has not been studied. Whether MsrB and MsrA play an equally important role in the antioxidant process is also poorly understood. In this study, we identified MsrB encoded by ncgl1823 in C. glutamicum, investigated its function and made a comparison with MsrA. The msrB gene showed a slight effect on utilizing methionine sulfoxide (MetO) as the sole Met source; however, the survival rates showed no sensitivity to oxidants. MsrB showed catalytic activity using thioredoxin/thioredoxin reductase (Trx/TrxR) reducing system as electron donors, but independent from the mycoredoxin 1/mycothione reductase/mycothiol (Mrx1/Mtr/MSH) system. Therefore, MsrB plays a limited role in resisting oxidative stress and it could reduce MetO to Met by the Trx/TrxR reducing system, which is useful for expanding the understanding of the functions of Msr in this important industrial microbe." @default.
- W2755232403 created "2017-09-25" @default.
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- W2755232403 date "2017-01-01" @default.
- W2755232403 modified "2023-10-16" @default.
- W2755232403 title "Functional comparison of methionine sulphoxide reductase A and B in <i>Corynebacterium glutamicum</i>" @default.
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- W2755232403 doi "https://doi.org/10.2323/jgam.2017.01.005" @default.
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