ArticleJournal of bacteriology2002
AmtB is necessary for NH(4)(+)-induced nitrogenase switch-off and ADP-ribosylation in Rhodobacter capsulatus.
Article in Journal of bacteriology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed.
- Nitrogen-fixing microbes gain genes in diverse types of living environments.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Potential of Phototrophic Purple Nonsulfur Bacteria to Fix Nitrogen in Rice Fields.Microorganisms · 2021Review
- Complete Genome Sequence of Lactobacillus hilgardii LMG 7934, Carrying the Gene Encoding for the Novel PII-Like Protein PotN.Current microbiology · 2020Article
- Article
- Microbial mutualism dynamics governed by dose-dependent toxicity of cross-fed nutrients.The ISME journal · 2017Article
- Antennal-expressed ammonium transporters in the malaria vector mosquito Anopheles gambiae.PloS one · 2014Article
- Nitrogenase switch-off and regulation of ammonium assimilation in response to light deprivation in Rhodospirillum rubrum are influenced by the nitrogen source used during growth.Journal of bacteriology · 2010Article
- Analysis and identification of ADP-ribosylated proteins of Streptomyces coelicolor M145.Journal of microbiology (Seoul, Korea) · 2009Article
- Ammonia-induced formation of an AmtB-GlnK complex is not sufficient for nitrogenase regulation in the photosynthetic bacterium Rhodobacter capsulatus.Journal of bacteriology · 2008Article
- Membrane sequestration of PII proteins and nitrogenase regulation in the photosynthetic bacterium Rhodobacter capsulatus.Journal of bacteriology · 2007Article
- Expression, purification and crystallization of the ammonium transporter Amt-1 from Archaeoglobus fulgidus.Acta crystallographica. Section F, Structural biology and crystallization communications · 2005Article
- Nitrogenase switch-off by ammonium ions in Azospirillum brasilense requires the GlnB nitrogen signal-transducing protein.Applied and environmental microbiology · 2005Article
- Characterization of three functional high-affinity ammonium transporters in Lotus japonicus with differential transcriptional regulation and spatial expression.Plant physiology · 2004Article
- Identification of critical residues in GlnB for its activation of NifA activity in the photosynthetic bacterium Rhodospirillum rubrum.Proceedings of the National Academy of Sciences of the United States of America · 2004Article
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2 authors.
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Abstract
Rhodobacter capsulatus possesses two genes potentially coding for ammonia transporters, amtB and amtY. In order to better understand their role in the physiology of this bacterium and their possible significance in nitrogen fixation, we created single-knockout mutants. Strains mutated in either amtB or amtY did not show a growth defect under any condition tested and were still capable of taking up ammonia at nearly wild-type rates, but an amtB mutant was no longer capable of transporting methylamine. The amtB strain but not the amtY strain was also totally defective in carrying out ADP-ribosylation of Fe-protein or the switch-off of in vivo nitrogenase activity in response to NH(4)(+) addition. ADP-ribosylation in response to darkness was unaffected in amtB and amtBY strains, and glutamine synthetase activity was normally regulated in these strains in response to ammonium addition, suggesting that one role of AmtB is to function as an ammonia sensor for the processes that regulate nitrogenase activity.
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