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. 1981 Jan;145(1):88–96. doi: 10.1128/jb.145.1.88-96.1981

Regulatory mutations conferring constitutive synthesis of major outer membrane proteins (OmpC and OmpF) in Escherichia coli.

T Sato, T Yura
PMCID: PMC217248  PMID: 7007334

Abstract

An ompB strain of Escherichia coli K-12 lacking major outer membrane proteins OmpC and OmpF was used to isolate a pair of mutants that have restored the ability to synthesize either OmpC or OmpF protein. These mutants were found to produce the respective proteins constitutively under the several conditions where the synthesis in the wild-type strain was markedly repressed; namely, in the absence of the ompB gene function, under restrictive medium conditions, or upon lysogenization with phage PA-2. The mutations ompCp1 and ompFp9 responsible for such synthesis were shown to be located in the close vicinity of the corresponding structural genes, ompC and ompF. Moreover, the mutations affect the expression of these genes in a cis-dominant fashion. Taken together with other evidence, it was suggested that ompCp1 and ompFp9 represent regulatory site mutations occurring at the promoter regions of ompC and ompF respectively. Relevance of these findings to the genetic control of outer membrane protein synthesis is discussed.

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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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