| Literature DB >> 11472955 |
J R Trzebiatowski1, D M Ragatz, F J de Bruijn.
Abstract
Eleven Sinorhizobium meliloti 1021 loci whose expression was induced under low oxygen concentrations were identified in a collection of 5,000 strains carrying Tn5-1063 (luxAB) transcriptional reporter gene fusions. The 11 Tn5-1063-tagged loci were cloned and characterized. The dependence of the expression of the tagged loci on the FixL/FixJ oxygen-sensing two-component regulatory system was examined. Three of the loci were found to be dependent upon fixL and fixJ for their expression, while one locus showed a partial dependence. The remaining seven loci showed fixL- and fixJ-independent induction of expression in response to oxygen limitation. This suggests that in S. meliloti, additional regulatory system(s) exist that respond either directly or indirectly to oxygen limitation conditions.Entities:
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Year: 2001 PMID: 11472955 PMCID: PMC93079 DOI: 10.1128/AEM.67.8.3728-3731.2001
Source DB: PubMed Journal: Appl Environ Microbiol ISSN: 0099-2240 Impact factor: 4.792