Nicotinate phosphoribosyltransferase
In enzymology, a nicotinate phosphoribosyltransferase (EC6.3.4.21) is an enzyme that catalyzes the chemical reaction
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.