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Sci Signal. 2012 Jun 12;5(228):pe26. doi: 10.1126/scisignal.2003181.

S-nitrosylation signaling in Escherichia coli.

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Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY 10016, USA.


Most bacteria generate nitric oxide (NO) either aerobically by NO synthases or anaerobically from nitrite. Far from being a mere by-product of nitrate respiration, bacterial NO has diverse physiological roles. Many proteins undergo NO-mediated posttranslational modification (S-nitrosylation) in anaerobically grown Escherichia coli. The regulation of one such protein, OxyR, represents a redox signaling paradigm in which the same transcription factor controls different protective genes depending on its S-nitrosylation versus S-oxidation status. We discuss a structural model that may explain the remarkable stability and specificity of OxyR S-nitrosylation.

[Indexed for MEDLINE]

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