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. 1980 Nov;144(2):744–751. doi: 10.1128/jb.144.2.744-751.1980

Mutations in nif genes that cause Klebsiella pneumoniae to be derepressed for nitrogenase synthesis in the presence of ammonium.

D MacNeil, W J Brill
PMCID: PMC294724  PMID: 7000753

Abstract

Four Nif+ revertants from strains with polar insertions in nifL, were insensitive to ammonium and amino acid repression of nitrogenase synthesis. These strains have mutations located in or near the nifL region. The derepressed phenotype was dominant in a merodiploid containing a nif+ plasmid. These nif regulatory mutations also suppressed the Nif- phenotype of Gln- strains. Thus, regulation by fixed nitrogen (possible via glutamine synthetase) occurs on the nifLA operon but not on the other six nif operons.

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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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