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Article

Overexpression of the dctA gene in Rhizobium meliloti: effect on transport of C4 dicarboxylates and symbiotic nitrogen fixation.

Canadian journal of microbiology - 1 Jun 1992

Rastogi V, Labes M, Finan T, Watson R

Abstract excerpt

Symbiotic nitrogen fixation may be limited by the transport of C4 dicarboxylates into bacteroids in the nodule for use as a carbon and energy source. In an attempt to increase dicarboxylate transport, a plasmid was constructed in which the Rhizobium meliloti structural transport gene dctA was fused to a tryptophan operon promoter from Salmonella typhimurium, trpPO. This resulted in a functional dctA gene that was...

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Source

Identifiers

PMID: 1504920
DOI: 10.1139/m92-091

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

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Overexpression of the dctA gene in Rhizobium meliloti: effect on transport of C4 dicarboxylates and symbiotic nitrogen fixation.PMID 1504920Read ↗

Two C4-dicarboxylate transport systems in Rhizobium sp. NGR234: rhizobial dicarboxylate transport is essential for nitrogen fixation in tropical legume symbioses.Semantic proximity Read ↗

Rhizobium leguminosarum nodulation gene (nod) expression is lowered by an allele-specific mutation in the dicarboxylate transport gene dctB.Semantic proximity Read ↗

Negative regulation of sigma 54-dependent dctA expression by the transcriptional activator DctD.Semantic proximity Read ↗

Identification of a system that allows a Rhizobium tropici dctA mutant to grow on succinate, but not on other C4-dicarboxylates.Semantic proximity Read ↗

Roles of DctA and DctB in signal detection by the dicarboxylic acid transport system of Rhizobium leguminosarum.Semantic proximity Read ↗

Symbiotic nitrogen fixation by a nifA deletion mutant of Rhizobium meliloti: the role of an unusual ntrC allele.Semantic proximity Read ↗

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Rhizobium meliloti mutants with decreased DAHP synthase activity are sensitive to exogenous tryptophan and phenylalanine and form ineffective nodules.Semantic proximity Read ↗

A homologue of the tryptophan-rich sensory protein TspO and FixL regulate a novel nutrient deprivation-induced Sinorhizobium meliloti locus.Semantic proximity Read ↗

Mutants of Rhizobium tropici strain CIAT899 that do not induce chlorosis in plants.Semantic proximity Read ↗

Utilization of orotate as a pyrimidine source by Salmonella typhimurium and Escherichia coli requires the dicarboxylate transport protein encoded by dctA.Semantic proximity Read ↗

Insertion of transposon Tn5tac1 in the Sinorhizobium meliloti malate dehydrogenase (mdh) gene results in conditional polar effects on downstream TCA cycle genes.Semantic proximity Read ↗

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