Literature DB >> 16417500

The assimilatory nitrate reduction system of the phototrophic bacterium Rhodobacter capsulatus E1F1.

C Pino1, F Olmo-Mira, P Cabello, M Martínez-Luque, F Castillo, M D Roldán, C Moreno-Vivián.   

Abstract

The phototrophic bacterium Rhodobacter capsulatus E1F1 assimilates nitrate under anaerobic phototrophic growth conditions. A 17 kb DNA region encoding the nitrate assimilation (nas) system of this bacterium has been cloned and sequenced. This region includes the genes coding for a putative ABC (ATP-binding cassette)-type nitrate transporter (nasFED) and the structural genes for the enzymes nitrate reductase (nasA), nitrite reductase (nasB) and hydroxylamine reductase (hcp). Three genes code for putative regulatory proteins: a nitrite-sensitive repressor (nsrR), a transcription antiterminator (nasT) and a nitrate sensor (nasS). Other genes probably involved in nitrate assimilation are also present in this region. The sequence analysis of these genes and the biochemical properties of the purified nitrate, nitrite and hydroxylamine reductases are reviewed.

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Year:  2006        PMID： 16417500     DOI： 10.1042/BST0340127

Source DB:  PubMed          Journal:  Biochem Soc Trans        ISSN： 0300-5127            Impact factor:   5.407


  12 in total

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9.  Nitrate ammonification by Nautilia profundicola AmH: experimental evidence consistent with a free hydroxylamine intermediate.

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10.  An integrated biochemical system for nitrate assimilation and nitric oxide detoxification in Bradyrhizobium japonicum.

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