Mutations that affect separate functions of OmpR the phosphorylated regulator of porin transcription in Escherichia coli

Frank D. Russo, James M. Slauch, Thomas Joseph Silhavy

Research output: Contribution to journalArticle

60 Scopus citations

Abstract

OmpR is a member of a family of bacterial transcriptional regulators whose activity is controlled by phosphorylation. It regulates the transcription of two genes, serving as an activator of ompC, and as both an activator and a repressor of ompF. A previously isolated collection of ompR mutations was analyzed for the effect of each on the expression of both genes simultaneously. The results of this analysis indicate that the activation, repression, and DNA binding functions of OmpR can be disrupted independently, and that mutations interfering with each of these functions cluster within the sequence of the OmpR protein. The nature of these mutations is discussed in terms of the mechanisms by which OmpR regulates transcription, and potentially similar mechanisms operating within closely related response regulators.

Original languageEnglish (US)
Pages (from-to)261-273
Number of pages13
JournalJournal of Molecular Biology
Volume231
Issue number2
DOIs
StatePublished - May 20 1993

All Science Journal Classification (ASJC) codes

  • Molecular Biology

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