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Article

Repression of the cob operon of Salmonella typhimurium by adenosylcobalamin is influenced by mutations in the pdu operon.

Journal of bacteriology - 1 Oct 1997

Ailion M, Roth J R

Abstract excerpt

The cob operon encodes functions needed for the biosynthesis of adenosylcobalamin (Ado-B12). Propanediol induces transcription of the cob operon and the neighboring pdu operon, which encodes proteins for the B12-dependent degradation of propanediol. Expression of the cob (but not the pdu) operon is repressed by exogenous cyanocobalamin. Evidence is provided that cob operon repression is signaled by internally...

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Methodology Data sources Editorial policy Privacy Delete account & data About Contact Helena Bioinformatics

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Identifiers

PMID: 9324256
DOI: 10.1128/jb.179.19.6084-6091.1997
PMCID: PMC179512

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Source receipt: pubmed, retrieved 7 Sept 2026.

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Repression of the cob operon of Salmonella typhimurium by adenosylcobalamin is influenced by mutations in the pdu operon.PMID 9324256Read ↗

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Cobalamin-dependent 1,2-propanediol utilization by Salmonella typhimurium.Semantic proximity Read ↗

The control region of the pdu/cob regulon in Salmonella typhimurium.Semantic proximity Read ↗

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High levels of transcription factor RpoS (sigma S) in mviA mutants negatively affect 1,2-propanediol-dependent transcription of the cob/pdu regulon of Salmonella typhimurium LT2.Semantic proximity Read ↗

Cobalamin (vitamin B12) repression of the Cob operon in Salmonella typhimurium requires sequences within the leader and the first translated open reading frame.Semantic proximity Read ↗

Functional analysis of the nicotinate mononucleotide:5,6-dimethylbenzimidazole phosphoribosyltransferase (CobT) enzyme, involved in the late steps of coenzyme B12 biosynthesis in Salmonella enterica.Semantic proximity Read ↗

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