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    J Bacteriol. 1988 Aug;170(8):3725-30.

    Salmonella typhimurium mutants lacking NAD pyrophosphatase.

    Source

    Department of Biology, University of Utah, Salt Lake City 84112.

    Abstract

    NAD can serve as both a purine and a pyridine source for Salmonella typhimurium. Exogenous NAD is rapidly broken down into nicotinamide mononucleotide and AMP by an NAD pyrophosphatase, the first step in the pathway for the assimilation of exogenous NAD. We isolated and characterized mutants of S. typhimurium lacking NAD pyrophosphatase activity; such mutants were identified by their failure to use exogenous NAD as a purine source. These mutants carry mutations that map at a new locus, designated pnuE, between 86 and 87 min on the Salmonella chromosome.

    PMID:
    2841298
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC211351
    Free PMC Article

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