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. 1981 Nov;148(2):514–520. doi: 10.1128/jb.148.2.514-520.1981

Methionine sulfoxide is transported by high-affinity methionine and glutamine transport systems in Salmonella typhimurium.

P D Ayling
PMCID: PMC216234  PMID: 7028716

Abstract

Three lines of evidence indicated that methionine sulfoxide is transported by the high-affinity methionine and glutamine transport systems in Salmonella typhimurium. First, methionine-requiring strains (metE) which have mutations affecting both of these transport systems (metP glnP) were unable to use methionine sulfoxide as a source of methionine. These strains could still grow on L-methionine because they possessed a low-affinity system (or systems) which transported L-methionine but not the sulfoxide. A methionine auxotroph with a defect only in the metP system, which was dependent upon the glnP+ system for the transport of methionine sulfoxide, was inhibited by L-glutamine because glutamine inhibited the transport of the sulfoxide by the glnP+ system. Second, a metE metP glnP strain could be transduced at either the metP or glnP genes to restore its ability to grow on methionine sulfoxide. Third, the transport of [14C]methionine sulfoxide was inhibited by methionine and by glutamine in the metP+ glnP+ strain. No transport was detected in the metP glnP double-mutant strain.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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