Reaction catalyzed by nicotinate-nucleotide diphosphorylase (carboxylating) (2.4.2.19)
+
+
=
+
beta-nicotinate D-ribonucleotide
+
diphosphate
+
CO2
=
pyridine-2,3-dicarboxylate
+
5-phospho-alpha-D-ribose 1-diphosphate
