Journal
JOURNAL OF BIOLOGICAL CHEMISTRY
Volume 281, Issue 42, Pages 31184-31187Publisher
AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
DOI: 10.1074/jbc.M606962200
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In a recent study on the reducing requirement for the methionine sulfoxide reductases (Msr) (Sagher, D., Brunell, D., Hejtmancik, J. F., Kantorow, M., Brot, N. & Weissbach, H. ( 2006) Proc. Natl. Acad. Sci. U. S. A. 103, 8656 - 8661), we have shown that thioredoxin, although an excellent reducing system for Escherichia coli MsrA and MsrB and bovine MsrA, is not an efficient reducing agent for either human MsrB2 (hMsrB2) or human MsrB3 (hMsrB3). In a search for another reducing agent for hMsrB2 and hMsrB3, it was recently found that thionein, the reduced, metal-free form of metallothionein, could function as a reducing system for hMsrB3, with weaker activity using hMsrB2. In the present study, we provide evidence that some selenium compounds are potent reducing agents for both hMsrB2 and hMsrB3.
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