PMID:9868788
| Citation |
Cunningham, L, Georgellis, D, Green, J and Guest, JR (1998) Co-regulation of lipoamide dehydrogenase and 2-oxoglutarate dehydrogenase synthesis in Escherichia coli: characterisation of an ArcA binding site in the lpd promoter. FEMS Microbiol. Lett. 169:403-8 |
|---|---|
| Abstract |
The lipoamide dehydrogenase gene (lpdA) encoding the E3 subunits of both the pyruvate dehydrogenase and 2-oxoglutarate dehydrogenase complexes of Escherichia coli, is expressed from the upstream pdh and internal lpd promoters of the pdh operon (pdhR-aceEF-lpdA). Under aerobic conditions, the specific components of the 2-oxoglutarate dehydrogenase complex encoded by the sucAB genes in the sdhCDAB-sucABCD operon are expressed from the sdh promoter. The provision of lipoamide dehydrogenase subunits for assembly into the 2-oxoglutarate dehydrogenase complex could thus be controlled by co-regulation of the lpd promoter with the sdh promoter. Here, the transcription start point of the lpd promoter was defined by primer extension analysis, and an ArcA binding site, TGTTAACAAT, overlapping the lpd promoter and matching the consensus at 8 out of 10 positions, was identified by in vitro footprint analysis. PdhR was not bound to the lpd promoter nor was ArcA bound specifically to the pdh promoter. These results support the view that co-regulation of the lpd and sdh promoters is mediated primarily by ArcA. |
| Links | |
| Keywords |
Aerobiosis; Base Sequence; Binding Sites; Dihydrolipoamide Dehydrogenase/biosynthesis; Dihydrolipoamide Dehydrogenase/genetics; Escherichia coli/enzymology; Escherichia coli/genetics; Gene Expression Regulation, Bacterial; Genes, Bacterial/genetics; Ketoglutarate Dehydrogenase Complex/biosynthesis; Ketoglutarate Dehydrogenase Complex/genetics; Molecular Sequence Data; Promoter Regions, Genetic/genetics; Pyruvate Dehydrogenase Complex/biosynthesis; Pyruvate Dehydrogenase Complex/genetics; Transcription, Genetic |
| edit table |
Significance
You can help EcoliWiki by summarizing why this paper is useful
Useful Materials and Methods
You can help Ecoliwiki by describing the useful materials (strains, plasmids, antibodies, etc) described in this paper.
Annotations
<annotationlinks/>
EcoliWiki Links
Add links to pages that link here (e.g. gene, product, method pages)
References
See Help:References for how to manage references in EcoliWiki.