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Rat liver mitochondria can synthesize nicotinamide adenine dinucleotide from nicotinamide mononucleotide and ATP via a putative matrix nicotinamide mononucleotide adenylyltransferase.
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1996
Year
Specific Nmn AdenylyltransferaseNicotinamide MononucleotideBiosynthesisAldo-keto ReductaseMitochondrial BiogenesisMitochondrial FunctionBiochemistryNad SynthesisNatural SciencesAldehyde DehydrogenaseMolecular BiologyNicotinamide Adenine DinucleotidePutative MatrixMitochondrial MatrixMetabolismMedicineRedox BiologyOxidative Stress
In order to gain some insight into the mechanism by which nicotinamide nucleotides localize in mitochondria, NMN was added to rat liver mitochondria, with NAD synthesis tested both enzymatically and by means of HPLC. Evidence is given that the mitochondrial matrix contains a specific NMN adenylyltransferase (E.C. 2.7.7.1.), inhibited by PPi, AMP and ADP-ribose. Some features of this enzyme, including the substrate, pH and temperature dependence were also investigated.