Nicotinate-nucleotide adenylyltransferase

Nicotinate-nucleotide adenylyltransferase
nicotinate-nucleotide adenylyltransferase
Identifiers
EC number 2.7.7.18
CAS number 9026-98-6
Databases
IntEnz IntEnz view
BRENDA BRENDA entry
ExPASy NiceZyme view
KEGG KEGG entry
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum
Gene Ontology AmiGO / EGO

In enzymology, a nicotinate-nucleotide adenylyltransferase (EC 2.7.7.18) is an enzyme that catalyzes the chemical reaction

ATP + nicotinate ribonucleotide \rightleftharpoons diphosphate + deamido-NAD+

Thus, the two substrates of this enzyme are ATP and nicotinate ribonucleotide, whereas its two products are diphosphate and deamido-NAD+.

This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing nucleotide groups (nucleotidyltransferases). The systematic name of this enzyme class is ATP:nicotinate-ribonucleotide adenylyltransferase. Other names in common use include deamido-NAD+ pyrophosphorylase, nicotinate mononucleotide adenylyltransferase, deamidonicotinamide adenine dinucleotide pyrophosphorylase, NaMN-ATase, and nicotinic acid mononucleotide adenylyltransferase. This enzyme participates in nicotinate and nicotinamide metabolism.

Structural studies

As of late 2007, 9 structures have been solved for this class of enzymes, with PDB accession codes 1K4K, 1K4M, 1KAM, 1KAQ, 1YUL, 1YUM, 1YUN, 2H29, and 2H2A.

References

  • IMSANDE J (1961). "Pathway of diphosphopyridine nucleotide biosynthesis in Escherichia coli". J. Biol. Chem. 236: 1494–7. PMID 13717628. 
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