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J. Bacteriol., Feb 1995, 502-507, Vol 177, No. 3
J Moskovitz, MA Rahman, J Strassman, SO Yancey, SR Kushner, N Brot and H Weissbach
The Escherichia coli peptide methionine sulfoxide reductase gene (msrA)
encodes a single-subunit polypeptide of 212 amino acid residues (M. A.
Rahman, H. Nelson, H. Weissbach, and N. Brot, J. Biol. Chem. 267:15549-
15551, 1992). RNA blot analysis showed that the gene is transcribed into an
mRNA of about 850 nucleotides. The promoter region was characterized, and
the transcription initiation site was identified by primer extension. The
synthesis of the MsrA protein increased about threefold in a
growth-phase-dependent fashion. In an attempt to define the in vivo role of
msrA, a chromosomal disruption was constructed. This mutant was more
sensitive to oxidative stress, suggesting that oxidation of methionine in
proteins plays an important role in oxidative damage.
Copyright © 1995, American Society for Microbiology
Escherichia coli peptide methionine sulfoxide reductase gene: regulation of expression and role in protecting against oxidative damage
Roche Institute of Molecular Biology, Roche Research Center, Nutley, New Jersey 07110.
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