Molecular characterization of nosRZDFYLX genes coding for denitrifying nitrous oxide reductase of Bradyrhizobium japonicum

The nosRZDFYLX gene cluster for the respiratory nitrous oxide reductase from Bradyrhizobium japonicum strain USDA110 has been cloned and sequenced. Seven protein coding regions corresponding to nosR, nosZ, the structural gene, nosD, nosF, nosY, nosL, and nosX were detected. The deduced amino acid se...

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Veröffentlicht in:Antonie van Leeuwenhoek 2004-04, Vol.85 (3), p.229-235
Hauptverfasser: VELASCO, Leonardo, MESA, Socorro, XU, Chang-Ai, DELGADO, Maria J, BEDMAR, Eulogio J
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container_title Antonie van Leeuwenhoek
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creator VELASCO, Leonardo
MESA, Socorro
XU, Chang-Ai
DELGADO, Maria J
BEDMAR, Eulogio J
description The nosRZDFYLX gene cluster for the respiratory nitrous oxide reductase from Bradyrhizobium japonicum strain USDA110 has been cloned and sequenced. Seven protein coding regions corresponding to nosR, nosZ, the structural gene, nosD, nosF, nosY, nosL, and nosX were detected. The deduced amino acid sequence exhibited a high degree of similarity to other nitrous oxide reductases from various sources. The NosZ protein included a signal peptide for protein export. Mutant strains carrying either a nosZ or a nosR mutation accumulated nitrous oxide when cultured microaerobically in the presence of nitrate. Maximal expression of a P nosZ-lacZ fusion in strain USDA110 required simultaneously both low level oxygen conditions and the presence of nitrate. Microaerobic activation of the fusion required FixLJ and FixK(2).
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Seven protein coding regions corresponding to nosR, nosZ, the structural gene, nosD, nosF, nosY, nosL, and nosX were detected. The deduced amino acid sequence exhibited a high degree of similarity to other nitrous oxide reductases from various sources. The NosZ protein included a signal peptide for protein export. Mutant strains carrying either a nosZ or a nosR mutation accumulated nitrous oxide when cultured microaerobically in the presence of nitrate. Maximal expression of a P nosZ-lacZ fusion in strain USDA110 required simultaneously both low level oxygen conditions and the presence of nitrate. 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Seven protein coding regions corresponding to nosR, nosZ, the structural gene, nosD, nosF, nosY, nosL, and nosX were detected. The deduced amino acid sequence exhibited a high degree of similarity to other nitrous oxide reductases from various sources. The NosZ protein included a signal peptide for protein export. Mutant strains carrying either a nosZ or a nosR mutation accumulated nitrous oxide when cultured microaerobically in the presence of nitrate. Maximal expression of a P nosZ-lacZ fusion in strain USDA110 required simultaneously both low level oxygen conditions and the presence of nitrate. Microaerobic activation of the fusion required FixLJ and FixK(2).</abstract><cop>Dordrecht</cop><pub>Springer</pub><pmid>15028871</pmid><doi>10.1023/B:ANTO.0000020156.42470.db</doi><tpages>7</tpages></addata></record>
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subjects Amino Acid Sequence
Amino acids
Bacteria
Bacterial Proteins - genetics
Bacterial Proteins - metabolism
Bacteriology
Biological and medical sciences
Bradyrhizobium - enzymology
Bradyrhizobium - genetics
Bradyrhizobium japonicum
Fundamental and applied biological sciences. Psychology
Gene Expression Regulation, Bacterial
Genes, Bacterial
Genes, Reporter
Genetics
Membrane Proteins - genetics
Membrane Proteins - metabolism
Microbiology
Molecular Sequence Data
Nitrous oxide
Nitrous Oxide - metabolism
Oxidoreductases - genetics
Oxidoreductases - metabolism
Promoter Regions, Genetic
Proteins
Recombinant Fusion Proteins - genetics
Recombinant Fusion Proteins - metabolism
title Molecular characterization of nosRZDFYLX genes coding for denitrifying nitrous oxide reductase of Bradyrhizobium japonicum
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