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

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.

journal_name

Biochem Soc Trans

authors

Pino C,Olmo-Mira F,Cabello P,Martínez-Luque M,Castillo F,Roldán MD,Moreno-Vivián C

doi

10.1042/BST0340127

keywords:

subject

Has Abstract

pub_date

2006-02-01 00:00:00

pages

127-9

issue

Pt 1

eissn

0300-5127

issn

1470-8752

pii

BST0340127

journal_volume

34

pub_type

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