Regulation of nitrogen fixation inAzospirillum brasilenseSp7: Involvement ofnifA, glnAandglnBgene products
- 1 December 1992
- journal article
- Published by Oxford University Press (OUP) in FEMS Microbiology Letters
- Vol. 100 (1-3) , 113-119
- https://doi.org/10.1111/j.1574-6968.1992.tb14028.x
Abstract
The expression of nifA-, niH- and nifB-lacZ fusions was examined in different mutants of Azospirillum brasilense. Mutations in nifA, glnA and glnB severely impaired the expression of nifH- and nifB-lacZ fusions. By contrast, a nifA-lacZ fusion was not affected in a nifA or a glnB background and was only partially impaired in glnA mutants. It is proposed that in A. brasilense, the PII protein and glutamine synthetase are involved in a post-translational modification of NifA.Keywords
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