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We characterized various phenotypes of a mutant inactivated for CymR, the master regulator of cysteine metabolism in Bacillus subtilis. The deletion of cymR resulted in impaired growth in the presence of cystine and increased sensitivity to hydrogen peroxide‐, disulfide‐, paraquat‐ and tellurite‐induced stresses. Estimation of metabolite pools suggested that these phenotypes could be the result of...
The Bacillus subtilis yusCBA operon, which encodes an ABC-type transporter, contains an S-box motif in its promoter region. We showed that the expression of these genes is repressed via the S-box system when methionine is available. The YusCB proteins are involved in the transport of both d- and l-methionine but also methionine sulfoxide. A yusCB mutant is unable to grow in the presence of 5 μM l-methionine...
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