Formimidoyltetrahydrofolate cyclodeaminase; Folate-dependent enzyme, that displays both transferase and deaminase activity. Serves to channel one-carbon units from formiminoglutamate to the folate pool (By similarity); In the C-terminal section; belongs to the cyclodeaminase/cyclohydrolase family.

Histidine ammonia-lyase; Belongs to the PAL/histidase family.

Uracil phosphoribosyltransferase homolog.

S-methyl-5'-thioadenosine phosphorylase; Catalyzes the reversible phosphorylation of S-methyl-5'- thioadenosine (MTA) to adenine and 5-methylthioribose-1-phosphate. Involved in the breakdown of MTA, a major by-product of polyamine biosynthesis. Responsible for the first step in the methionine salvage pathway after MTA has been generated from S-adenosylmethionine. Has broad substrate specificity with 6-aminopurine nucleosides as preferred substrates.

Purine nucleoside phosphorylase; The purine nucleoside phosphorylases catalyze the phosphorolytic breakdown of the N-glycosidic bond in the beta- (deoxy)ribonucleoside molecules, with the formation of the corresponding free purine bases and pentose-1-phosphate.

Adenylosuccinate lyase; Belongs to the lyase 1 family. Adenylosuccinate lyase subfamily.

5'-nucleotidase; Hydrolyzes extracellular nucleotides into membrane permeable nucleosides.

Uridine phosphorylase; Catalyzes the reversible phosphorylytic cleavage of uridine and deoxyuridine to uracil and ribose- or deoxyribose-1-phosphate. The produced molecules are then utilized as carbon and energy sources or in the rescue of pyrimidine bases for nucleotide synthesis.

Trifunctional purine biosynthetic protein adenosine-3; In the C-terminal section; belongs to the GART family. In the central section; belongs to the AIR synthase family.