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Control of Herbaspirillum seropedicae NifA Activity by Ammonium Ions and Oxygen

By E. M. Souza, F. O. Pedrosa, M. Drummond, L. U. Rigo and M. G. Yates


The activity of a truncated form of Herbaspirillum seropedicae NifA in different genetic backgrounds showed that its regulatory domain is involved in nitrogen control but not in O2 sensitivity or Fe dependence. The model for nitrogen control involving PII could thus apply to the proteobacteria at large. NifA may have a role in controlling ADP-ribosylation of nitrogenase in Azospirillum brasilense

Topics: Genetics and Molecular Biology
Publisher: American Society for Microbiology
Year: 1999
OAI identifier: oai:pubmedcentral.nih.gov:93428
Provided by: PubMed Central
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