High-level expression in Escherichia coli of the catalytically active flavin domain of corn leaf NADH:nitrate reductase and its comparison to human NADH:cytochrome B5 reductase

Higher plant nitrate reductase can be divided into three functional domains representing its prosthetic groups: 1) flavin; 2) cytochrome b; and 3) Mo-pterin. The flavin domain has been synthesized by heterologous expression in Escherichia coli using a fragment of a corn leaf NADH:nitrate reductase c...

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Veröffentlicht in:Biochemical and biophysical research communications 1990-05, Vol.168 (3), p.1285-1291
Hauptverfasser: Hyde, G.E. (Michigan Technological University, Houghton, MI), Campbell, W.H
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creator Hyde, G.E. (Michigan Technological University, Houghton, MI)
Campbell, W.H
description Higher plant nitrate reductase can be divided into three functional domains representing its prosthetic groups: 1) flavin; 2) cytochrome b; and 3) Mo-pterin. The flavin domain has been synthesized by heterologous expression in Escherichia coli using a fragment of a corn leaf NADH:nitrate reductase cDNA clone, Zmnr1, which we had previously isolated and sequenced. A Xho2-BamH1 fragment was cut from Zmnr1, containing the sequence for the flavin domain, and ligated in the BamH1 site of expression vector pET3c. When this construct was expressed in E. coli, a 30 kD polypeptide was found to be newly synthesized. The flavin domain was purified to homogeneity using blue Sepharose and shown to have a molecular weight of 30 kD. The recombinant flavin domain has a ferricyanide reductase specific activity of 1000 mumols NADH oxidized/min/mg protein and a visible spectrum virtually identical to that of human NADH:cytochrome b5 reductase.
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(Michigan Technological University, Houghton, MI)</creatorcontrib><creatorcontrib>Campbell, W.H</creatorcontrib><collection>AGRIS</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Biochemical and biophysical research communications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hyde, G.E. 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The flavin domain has been synthesized by heterologous expression in Escherichia coli using a fragment of a corn leaf NADH:nitrate reductase cDNA clone, Zmnr1, which we had previously isolated and sequenced. A Xho2-BamH1 fragment was cut from Zmnr1, containing the sequence for the flavin domain, and ligated in the BamH1 site of expression vector pET3c. When this construct was expressed in E. coli, a 30 kD polypeptide was found to be newly synthesized. The flavin domain was purified to homogeneity using blue Sepharose and shown to have a molecular weight of 30 kD. The recombinant flavin domain has a ferricyanide reductase specific activity of 1000 mumols NADH oxidized/min/mg protein and a visible spectrum virtually identical to that of human NADH:cytochrome b5 reductase.</abstract><cop>United States</cop><pmid>2189408</pmid><doi>10.1016/0006-291X(90)91168-R</doi><tpages>7</tpages></addata></record>
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ispartof Biochemical and biophysical research communications, 1990-05, Vol.168 (3), p.1285-1291
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source MEDLINE; ScienceDirect Journals (5 years ago - present)
subjects ACTIVIDAD CATALITICA
ACTIVIDAD ENZIMATICA
ACTIVITE CATALYTIQUE
ACTIVITE ENZYMATIQUE
Amino Acid Sequence
Catalysis
CATALYTIC ACTIVITY
COENZIMAS
COENZYME
COENZYMES
Cytochrome Reductases - genetics
Cytochrome-B Reductase
Electrophoresis, Polyacrylamide Gel
ENZYMIC ACTIVITY
Escherichia coli - genetics
FEUILLE
Flavins - genetics
Flavins - isolation & purification
Gene Expression
HOJAS
Humans
LEAVES
METALLOPROTEINE
METALLOPROTEINS
METALPROTEINAS
Molecular Sequence Data
Nitrate Reductase (NADH)
Nitrate Reductases - genetics
Nitrate Reductases - metabolism
NUCLEOTIDE
NUCLEOTIDES
NUCLEOTIDOS
Peptide Biosynthesis
Peptides - isolation & purification
PIGMENT
PIGMENTOS
PIGMENTS
Recombinant Proteins
Sequence Homology, Nucleic Acid
ZEA MAYS
Zea mays - enzymology
Zea mays - genetics
title High-level expression in Escherichia coli of the catalytically active flavin domain of corn leaf NADH:nitrate reductase and its comparison to human NADH:cytochrome B5 reductase
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