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. 1991 Feb;57(2):622–624. doi: 10.1128/aem.57.2.622-624.1991

Temperature-Dependent Regulation by Molybdenum and Vanadium of Expression of the Structural Genes Encoding Three Nitrogenases in Azotobacter vinelandii

Jean Walmsley 1, Christina Kennedy 1,*
PMCID: PMC182764  PMID: 16348426

Abstract

Temperature affects the expression of the three different nitrogenases in Azotobacter vinelandii. Molybdenum repressed the vnfH and anfH operons relatively more at 30°C than at 20°C; at 14°C molybdenum did not repress these genes at all. Similarly, V repressed the anf operon at 30°C but not at 20 or 14°C. Mo was poorly transported into cells grown at the lower temperatures. A. vinelandii thus has the potential to synthesize any of the three nitrogenases at 14 to 20°C regardless of the presence of Mo or V.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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