Nicotinate phosphoribosyltransferase
In enzymology, a nicotinate phosphoribosyltransferase (EC 6.3.4.21) is an enzyme that catalyzes the chemical reaction
- nicotinate + 5-phospho-α-D-ribose 1-diphosphate + ATP + H2O nicotinate D-ribonucleotide + diphosphate + ADP + phosphate
| Nicotinate phosphoribosyltransferase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Nicotinate phosphoribosyltransferase dimer, Human | |||||||||
| Identifiers | |||||||||
| EC no. | 6.3.4.21 | ||||||||
| CAS no. | 9030-26-6 | ||||||||
| 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 / QuickGO | ||||||||
| |||||||||
Thus, the four substrates of this enzyme are nicotinate, 5-phospho-alpha-D-ribose 1-diphosphate, ATP, and H2O, whereas its four products are nicotinate D-ribonucleotide, diphosphate, ADP, and phosphate.
This enzyme belongs to the family of ligases, specifically those forming generic carbon-nitrogen bonds. The systematic name of this enzyme class is 5-phospho-alpha-D-ribose 1-diphosphate:nicotinate ligase (ADP, diphosphate-forming) .
Structural studies
As of late 2007, 7 structures have been solved for this class of enzymes, with PDB accession codes 1VLP, 1YBE, 1YIR, 1YTD, 1YTE, 1YTK, and 2F7F.
References
- IMSANDE J (1961). "Pathway of diphosphopyridine nucleotide biosynthesis in Escherichia coli". J. Biol. Chem. 236: 1494–7. PMID 13717628.
- IMSANDE J, HANDLER P (1961). "Biosynthesis of diphosphopyridine nucleotide. III. Nicotinic acid mononucleotide pyrophos-phorylase". J. Biol. Chem. 236: 525–30. PMID 13717627.
- Kosaka A, Spivey HO, Gholson RK (1971). "Nicotinate phosphoribosyltransferase of yeast. Purification and properties". J. Biol. Chem. 246 (10): 3277–83. PMID 4324895.
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