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http://purl.uniprot.org/citations/2841129http://www.w3.org/1999/02/22-rdf-syntax-ns#typehttp://purl.uniprot.org/core/Journal_Citation
http://purl.uniprot.org/citations/2841129http://www.w3.org/1999/02/22-rdf-syntax-ns#typehttp://purl.uniprot.org/core/Journal_Citation
http://purl.uniprot.org/citations/2841129http://www.w3.org/2000/01/rdf-schema#comment"The two genes, nadA and nadB, responsible for quinolinate biosynthesis from aspartate and dihydroxyacetone phosphate in Escherichia coli were cloned and characterized. Quinolinate (pyridine-2,3-dicarboxylate) is the biosynthetic precursor of the pyridine ring of NAD. Gene nadA was identified by complementation in three different nadA mutant strains. Sequence analysis provided an 840-bp open reading frame coding for a 31,555-Da protein. Gene nadB was identified by complementation in a nadB mutant strain and by the L-aspartate oxidase activity of its gene product. Sequence analysis showed a 1620-bp open reading frame coding for a 60,306-Da protein. For both genes, promoter regions and ribosomal binding sites were assigned by comparison to consensus sequences. The nadB gene product, L-aspartate oxidase, was purified to homogeneity and the N-terminal sequence of 19 amino acids was determined. The enzyme was shown to be specific for L-aspartate. High-copy-number vectors, carrying either gene nadA, nadB or nadA + nadB, increased quinolinate production 1.5-fold, 2.0-fold and 15-fold respectively. Both gene products seem to be equally rate-limiting in quinolinate synthesis."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.org/dc/terms/identifier"doi:10.1111/j.1432-1033.1988.tb14187.x"xsd:string
http://purl.uniprot.org/citations/2841129http://purl.org/dc/terms/identifier"doi:10.1111/j.1432-1033.1988.tb14187.x"xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Seifert J."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Seifert J."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Guetlich M."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Guetlich M."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Gassen H.G."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Gassen H.G."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Flachmann R."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Flachmann R."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Kunz N."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Kunz N."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Laeufer A."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Laeufer A."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Wientjes F.-J."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/author"Wientjes F.-J."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/date"1988"xsd:gYear
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/date"1988"xsd:gYear
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/name"Eur. J. Biochem."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/name"Eur. J. Biochem."xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/pages"221-228"xsd:string
http://purl.uniprot.org/citations/2841129http://purl.uniprot.org/core/pages"221-228"xsd:string