ArticleJournal of microbiology (Seoul, Korea)2010
The involvement of the nif-associated ferredoxin-like genes fdxA and fdxN of Herbaspirillum seropedicae in nitrogen fixation.
Article in Journal of microbiology (Seoul, Korea), 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 10 citations in OpenAlex.
- Biosynthesis of Nitrogenase Cofactors.Chemical reviews · 2020Review
- Modulation of defence and iron homeostasis genes in rice roots by the diazotrophic endophyte Herbaspirillum seropedicae.Scientific reports · 2019Article
- Genomic Insights Into Plant-Growth-Promoting Potentialities of the GenusFrontiers in microbiology · 2019Article
- Electron Transfer to Nitrogenase in Different Genomic and Metabolic Backgrounds.Journal of bacteriology · 2018Article
- CowN sustains nitrogenase turnover in the presence of the inhibitor carbon monoxide.The Journal of biological chemistryArticle
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Authors and funding
9 authors at 1 institution in 1 country.
Funding
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Abstract
The pathway of electron transport to nitrogenase in the endophytic beta-Proteobacterium Herbaspirillum seropedicae has not been characterized. We have generated mutants in two nif-associated genes encoding putative ferredoxins, fdxA and fdxN. The fdxA gene is part of the operon nifHDKENXorf1orf2fdxAnifQmodABC and is transcribed from the nifH promoter, as revealed by lacZ gene fusion. The fdxN gene is probably cotranscribed with the nifB gene. Mutational analysis suggests that the FdxA protein is essential for maximum nitrogenase activity, since the nitrogenase activity of the fdxA mutant strain was reduced to about 30% of that of the wild-type strain. In addition, the fdxA mutation had no effect on the nitrogenase switch-off in response to ammonium. Nitrogenase activity of a mutant strain lacking the fdxN gene was completely abolished. This phenotype was reverted by complementation with fdxN expressed under lacZ promoter control. The results suggest that the products of both the fdxA and fdxN genes are probably involved in electron transfer during nitrogen fixation.
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