ID   2.4.2.19
DE   Nicotinate-nucleotide diphosphorylase (carboxylating).
AN   Nicotinate-nucleotide pyrophosphorylase (carboxylating).
AN   Quinolinate phosphoribosyltransferase (decarboxylating).
CA   Beta-nicotinate D-ribonucleotide + diphosphate + CO(2) = pyridine-2,3-
CA   dicarboxylate + 5-phospho-alpha-D-ribose 1-diphosphate.
CC   -!- The reaction is catalyzed in the opposite direction.
CC   -!- Since quinolinate is synthesized from L-tryptophan in eukaryotes,
CC       but from L-aspartate in some prokaryotes, this is the first NAD(+)
CC       biosynthesis enzyme shared by both eukaryotes and prokaryotes.
DR   O28439, NADC_ARCFU ;  P39666, NADC_BACSU ;  Q3T063, NADC_BOVIN ;
DR   Q75JX0, NADC_DICDI ;  P30011, NADC_ECOLI ;  Q9ZJN2, NADC_HELPJ ;
DR   O25909, NADC_HELPY ;  Q15274, NADC_HUMAN ;  Q57916, NADC_METJA ;
DR   O27860, NADC_METTH ;  Q91X91, NADC_MOUSE ;  P46714, NADC_MYCLE ;
DR   O06594, NADC_MYCTU ;  A7SG73, NADC_NEMVE ;  P30819, NADC_PSEAE ;
DR   Q5I0M2, NADC_RAT   ;  P77938, NADC_RHORU ;  P30012, NADC_SALTY ;
DR   P74301, NADC_SYNY3 ;  P43619, NADC_YEAST ;
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