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Article

A new regulatory element modulates homoserine lactone-mediated autoinduction of Ti plasmid conjugal transfer.

Journal of bacteriology - 1 Jan 1995

Hwang I, Cook D M, Farrand S K

Abstract excerpt

Conjugal transfer of the Agrobacterium tumefaciens nopaline-type Ti plasmid pTiC58 is induced by agrocinopines A and B, opines secreted by crown gall tumors induced by the bacterium. This regulation functions through the transcriptional repressor, AccR. However, actual transcription of the tra genes is regulated by autoinduction through the activator TraR and the substituted homoserine lactone second messenger,...

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Identifiers

PMID: 7814335
DOI: 10.1128/jb.177.2.449-458.1995
PMCID: PMC176609

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Related research

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Research trail→

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A new regulatory element modulates homoserine lactone-mediated autoinduction of Ti plasmid conjugal transfer.PMID 7814335Read ↗

The antiactivator TraM interferes with the autoinducer-dependent binding of TraR to DNA by interacting with the C-terminal region of the quorum-sensing activator.Semantic proximity Read ↗

Octopine-type Ti plasmids code for a mannopine-inducible dominant-negative allele of traR, the quorum-sensing activator that regulates Ti plasmid conjugal transfer.Semantic proximity Read ↗

Induction and loss of Ti plasmid conjugative competence in response to the acyl-homoserine lactone quorum-sensing signal.Semantic proximity Read ↗

Dual control of quorum sensing by two TraM-type antiactivators in Agrobacterium tumefaciens octopine strain A6.Semantic proximity Read ↗

The Agrobacterium tumefaciens rnd homolog is required for TraR-mediated quorum-dependent activation of Ti plasmid tra gene expression.Semantic proximity Read ↗

Localization of OccR-activated and TraR-activated promoters that express two ABC-type permeases and the traR gene of Ti plasmid pTiR10.Semantic proximity Read ↗

Essential components of the Ti plasmid trb system, a type IV macromolecular transporter.Semantic proximity Read ↗

Identification of amino acid residues of the Agrobacterium tumefaciens quorum-sensing regulator TraR that are critical for positive control of transcription.Semantic proximity Read ↗

TraM of plasmid R1 controls transfer gene expression as an integrated control element in a complex regulatory network.Semantic proximity Read ↗

Quorum-sensing antiactivator TraM forms a dimer that dissociates to inhibit TraR.Semantic proximity Read ↗

Identification of amino acid residues of the pheromone-binding domain of the transcription factor TraR that are required for positive control.Semantic proximity Read ↗

Amino-terminal protein fusions to the TraR quorum-sensing transcription factor enhance protein stability and autoinducer-independent activity.Semantic proximity Read ↗

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