Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Dihydroorotase; Catalyzes the reversible hydrolysis of the amide bond within dihydroorotate. This metabolic intermediate is required for the biosynthesis of pyrimidine nucleotides; Derived by automated computational analysis using gene prediction method: Protein Homology.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

CDP-6-deoxy-delta-3,4-glucoseen reductase; Derived by automated computational analysis using gene prediction method: Protein Homology.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Carbamoyl phosphate synthase small subunit; Catalyzes production of carbamoyl phosphate from bicarbonate and glutamine in pyrimidine and arginine biosynthesis pathways; forms an octamer composed of four CarAB dimers; Derived by automated computational analysis using gene prediction method: Protein Homology.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Carbamoyl phosphate synthase large subunit; Four CarB-CarA dimers form the carbamoyl phosphate synthetase holoenzyme that catalyzes the production of carbamoyl phosphate; CarB is responsible for the amidotransferase activity; Derived by automated computational analysis using gene prediction method: Protein Homology.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

GMP synthase; Catalyzes the synthesis of GMP from XMP.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

N5-carboxyaminoimidazole ribonucleotide mutase; Catalyzes the conversion of N5-carboxyaminoimidazole ribonucleotide (N5-CAIR) to 4-carboxy-5-aminoimidazole ribonucleotide (CAIR).

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Phosphoribosylformylglycinamidine synthase; Phosphoribosylformylglycinamidine synthase involved in the purines biosynthetic pathway. Catalyzes the ATP-dependent conversion of formylglycinamide ribonucleotide (FGAR) and glutamine to yield formylglycinamidine ribonucleotide (FGAM) and glutamate.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Aspartate carbamoyltransferase; Catalyzes the transfer of the carbamoyl moiety from carbamoyl phosphate to L- aspartate in pyrimidine biosynthesis; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Dihydroorotate dehydrogenase; Catalyzes the conversion of dihydroorotate to orotate with quinone as electron acceptor; Belongs to the dihydroorotate dehydrogenase family. Type 2 subfamily.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Orotate phosphoribosyltransferase; Catalyzes the transfer of a ribosyl phosphate group from 5- phosphoribose 1-diphosphate to orotate, leading to the formation of orotidine monophosphate (OMP).

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Orotidine 5'-phosphate decarboxylase; Catalyzes the decarboxylation of orotidine 5'-monophosphate (OMP) to uridine 5'-monophosphate (UMP); Belongs to the OMP decarboxylase family. Type 1 subfamily.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Uracil phosphoribosyltransferase; Also displays a weak uracil phosphoribosyltransferase activity which is not physiologically significant.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Uracil phosphoribosyltransferase; Catalyzes the conversion of uracil and 5-phospho-alpha-D- ribose 1-diphosphate (PRPP) to UMP and diphosphate.

Xanthine permease; High-affinity transporter for xanthine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Xanthine phosphoribosyltransferase; Converts the preformed base xanthine, a product of nucleic acid breakdown, to xanthosine 5'-monophosphate (XMP), so it can be reused for RNA or DNA synthesis.

Adenylosuccinate lyase; Catalyzes two discrete reactions in the de novo synthesis of purines: the cleavage of adenylosuccinate and succinylaminoimidazole carboxamide ribotide; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the lyase 1 family. Adenylosuccinate lyase subfamily.

GMP synthase; Catalyzes the synthesis of GMP from XMP.

Adenylosuccinate lyase; Catalyzes two discrete reactions in the de novo synthesis of purines: the cleavage of adenylosuccinate and succinylaminoimidazole carboxamide ribotide; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the lyase 1 family. Adenylosuccinate lyase subfamily.

Inosine 5'-monophosphate dehydrogenase; Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore plays an important role in the regulation of cell growth. Belongs to the IMPDH/GMPR family.

Adenylosuccinate lyase; Catalyzes two discrete reactions in the de novo synthesis of purines: the cleavage of adenylosuccinate and succinylaminoimidazole carboxamide ribotide; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the lyase 1 family. Adenylosuccinate lyase subfamily.

Adenylosuccinate synthetase; Plays an important role in the de novo pathway of purine nucleotide biosynthesis. Catalyzes the first committed step in the biosynthesis of AMP from IMP; Belongs to the adenylosuccinate synthetase family.

Adenylosuccinate lyase; Catalyzes two discrete reactions in the de novo synthesis of purines: the cleavage of adenylosuccinate and succinylaminoimidazole carboxamide ribotide; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the lyase 1 family. Adenylosuccinate lyase subfamily.

Phosphoribosylaminoimidazole-succinocarboxamide synthase; Catalyzes the formation of (S)-2-(5-amino-1-(5-phospho-D-ribosyl)imidazole-4- carboxamido)succinate from 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate and L-aspartate in purine biosynthesis; SAICAR synthase; Derived by automated computational analysis using gene prediction method: Protein Homology.

Adenylosuccinate lyase; Catalyzes two discrete reactions in the de novo synthesis of purines: the cleavage of adenylosuccinate and succinylaminoimidazole carboxamide ribotide; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the lyase 1 family. Adenylosuccinate lyase subfamily.

Phosphoribosylamine--glycine ligase; Catalyzes the formation of N(1)-(5-phospho-D-ribosyl)glycinamide from 5-phospho-D-ribosylamine and glycine in purine biosynthesis; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the GARS family.

Adenylosuccinate lyase; Catalyzes two discrete reactions in the de novo synthesis of purines: the cleavage of adenylosuccinate and succinylaminoimidazole carboxamide ribotide; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the lyase 1 family. Adenylosuccinate lyase subfamily.

N5-carboxyaminoimidazole ribonucleotide mutase; Catalyzes the conversion of N5-carboxyaminoimidazole ribonucleotide (N5-CAIR) to 4-carboxy-5-aminoimidazole ribonucleotide (CAIR).