Nicotinamide-Nucleotide Adenylyltransferase

**Definition:** An enzyme that catalyzes reversibly the transfer of the adenylyl moiety of ATP to the phosphoryl group of NMN to form NAD+ and pyrophosphate. The enzyme is found predominantly in the nuclei and catalyzes the final reaction in the major pathway for the biosynthesis of NAD in mammals.

**Tree numbers:** - D08.811.913.696.445.600 - D12.776.157.687.499 - D12.776.660.720.499

**Synonyms:** - ATP-NMN Adenylyltransferase - NAD Pyrophosphorylase - Nicotinamide Mononucleotide Adenylyltransferase - NMN Adenylyltransferase