beta-D-ribosylnicotinate

1. ATP:beta-D-ribosylnicotinate 5-phosphotransferase

Catalysed by NMRK2, NMRK1cytosol

1. Nicotinate D-ribonucleoside:orthophosphate ribosyltransferase

No catalyst recordedcytosol

1. Nicotinate D-ribonucleoside:orthophosphate ribosyltransferase

No catalyst recordedcytosol

1. beta-D-ribosylnicotinate + ATP = nicotinate beta-D-ribonucleotide + ADP + H(+)

Catalysed by NMRK2, NMRK1

1. Nicotinate D-ribonucleoside:orthophosphate ribosyltransferase
2. purine nucleoside phosphorylase (nicotinamide)

Catalysed by PNPcytosol

1. Nicotinate D-ribonucleoside:orthophosphate ribosyltransferase
2. adenosine:phosphate alpha-D-ribosyltransferase

Catalysed by PNPcytosol

1. Nicotinate D-ribonucleoside:orthophosphate ribosyltransferase

1. Nicotinate D-ribonucleoside:orthophosphate ribosyltransferase
2. purine nucleoside phosphorylase (nicotinamide)
3. 1-(beta-D-ribofuranosyl)-1,4-dihydronicotinamide + a quinone + H(+) = beta-nicotinamide D-riboside + a quinol

Catalysed by PNP, NQO2cytosol

1. beta-D-ribosylnicotinate + ATP = nicotinate beta-D-ribonucleotide + ADP + H(+)
2. nicotinate beta-D-ribonucleotide + CO2 + diphosphate = quinolinate + 5-phospho-alpha-D-ribose 1-diphosphate + 2 H(+)
3. Orotidine-5'-phosphate:diphosphate phospho-alpha-D-ribosyl-transferase

Catalysed by NMRK2