J. Bacteriol., Jun 1996, 3671-3675, Vol 178, No. 12
Copyright © 1996, American Society for Microbiology

Conservation of PcaQ, a transcriptional activator of pca genes for catabolism of phenolic compounds, in Agrobacterium tumefaciens and Rhizobium species

D Parke
Department of Biology, Yale University, New Haven, Connecticut 06520- 8103, USA.

In Agrobacterium tumefaciens A348, control of five genes for catabolism of the phenolic compound protocatechuate to beta-ketoadipate is exerted by the gene pcaQ. The product of pcaQ is a transcriptional activator which is distinct from regulators of the beta-ketoadipate pathway characterized in other bacterial groups. An investigation of whether pcaQ is present and conserved in related Rhizobium species employed Southern hybridization and an agrobacterial pcaD::LacZ promoter probe plasmid. These studies revealed that homologs of the activator are widespread among members of the family Rhizobiaceae, being present in Rhizobium leguminosarum, Rhizobium fredii, Rhizobium meliloti, Rhizobium etli, and Rhizobium tropici.

This article has been cited by other articles:

• MacLean, A. M., Anstey, M. I., Finan, T. M. (2008). Binding Site Determinants for the LysR-Type Transcriptional Regulator PcaQ in the Legume Endosymbiont Sinorhizobium meliloti. J. Bacteriol. 190: 1237-1246 [Abstract] [Full Text]  
• MacLean, A. M., MacPherson, G., Aneja, P., Finan, T. M. (2006). Characterization of the {beta}-Ketoadipate Pathway in Sinorhizobium meliloti. Appl. Environ. Microbiol. 72: 5403-5413 [Abstract] [Full Text]  
• Muller, W. E. G., Grebenjuk, V. A., Thakur, N. L., Thakur, A. N., Batel, R., Krasko, A., Muller, I. M., Breter, H. J. (2004). Oxygen-Controlled Bacterial Growth in the Sponge Suberites domuncula: toward a Molecular Understanding of the Symbiotic Relationships between Sponge and Bacteria. Appl. Environ. Microbiol. 70: 2332-2341 [Abstract] [Full Text]  
• Buchan, A., Collier, L. S., Neidle, E. L., Moran, M. A. (2000). Key Aromatic-Ring-Cleaving Enzyme, Protocatechuate 3,4-Dioxygenase, in the Ecologically Important Marine Roseobacter Lineage. Appl. Environ. Microbiol. 66: 4662-4672 [Abstract] [Full Text]