Acronyms that contain the term nicotinamide-nucleotide adenylyltransferase  Page #4

Nicotinamide-nucleotide adenylyltransferase

In enzymology, nicotinamide-nucleotide adenylyltransferase (NMNAT) (EC 2.7.7.1) are enzymes that catalyzes the chemical reaction ATP + nicotinamide mononucleotide ⇌ {\displaystyle \rightleftharpoons } diphosphate + NAD+Thus, the two substrates of this enzyme are ATP and nicotinamide mononucleotide (NMN), whereas its two products are diphosphate and NAD+. This enzyme participates in nicotinate and nicotinamide metabolism. Humans have three protein isoforms: NMNAT1 (widespread), NMNAT2 (predominantly in brain), and NMNAT3 (highest in liver, heart, skeletal muscle, and erythrocytes). Mutations in the NMNAT1 gene lead to the LCA9 form of Leber congenital amaurosis. Mutations in NMNAT2 or NMNAT3 genes are not known to cause any human disease. NMNAT2 is critical for neurons: loss of NMNAT2 is associated with neurodegeneration. All NMNAT isoforms reportedly decline with age.

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