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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Brousseau, R. Konishi, Y. Bergeron, H. Lau, P. C. Labbé, D. Wang, Y. Patel, A. Rawlings, M. |
| Description | Author Affiliation: Lau PC ( Biotechnology Research Institute, National Research Council of Canada, Montreal, QC. peter.lau@nrc.ca); |
| Abstract | The two-component signal transduction pathways in bacteria use a histidine-aspartate phosphorelay circuit to mediate cellular changes in response to environmental stimuli. Here we describe a novel two-component todST system, which activates expression of the toluene degradation (tod) pathway in Pseudomonas putida F1. The todS gene is predicted to encode a sensory hybrid kinase with two unique properties--a basic region leucine zipper dimerization motif at the N terminus and a duplicated histidine kinase motif. Evidence from a synthetic peptide model suggests that TodS binds as a dimer to a pseudopalindromic sequence (5'-TGACTCA), which resembles the recognition sequence of the eukaryotic transcription factors Fos and Jun. These results provide additional evidence that bacteria and eukaryotes share common regulatory motifs. The todT gene product, a response regulator, was overproduced as a fusion protein in Escherichia coli, and the purified protein was found to bind specifically to a 6-bp palindromic DNA structure in the tod control region. The phosphorylated form of TodT appears to be the activator of tod structural genes. This is the first report of a two-component system that regulates aromatic metabolism in bacteria. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 4 |
| Volume Number | 94 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1997-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Gene Expression Regulation, Bacterial Leucine Zippers Genetics Protein Kinases Pseudomonas Putida Toluene Metabolism Trans-Activators Amino Acid Sequence Bacterial Proteins Classification Biodegradation, Environmental DNA Footprinting DNA Mutational Analysis Dimerization Genes, Bacterial Membrane Proteins Molecular Sequence Data Mutagenesis, Site-Directed Peptide Fragments Promoter Regions, Genetic Protein Binding Enzymology Recombinant Proteins Sequence Homology, Amino Acid Signal Transduction Transcription Factor AP-1 Comparative Study Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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