Phosphoribulokinase/uridine kinase (IPR006083)

Short name: PRK/URK

Overlapping homologous superfamilies

Domain relationships



Phosphoribulokinase (PRK) EC: catalyses the ATP-dependent phosphorylation of ribulose-5-phosphate to ribulose-1,5-phosphate, a key step in the pentose phosphate pathway where carbon dioxide is assimilated by autotrophic organisms [PMID: 2175647]. In general, plant enzymes are light-activated by the thioredoxin/ferredoxin system, while those from photosynthetic bacteria are regulated by a system that has an absolute requirement for NADH. Thioredoxin/ferredoxin regulation is mediated by the reversible oxidation/reduction of sulphydryl and disulphide groups.

Uridine kinase (pyrimidine ribonucleoside kinase) is the rate-limiting enzyme in the pyrimidine salvage pathway. It catalyzes the following reaction: ATP + Uridine = ADP + UMP

Pantothenate kinase (EC: catalyzes the rate-limiting step in the biosynthesis of coenzyme A, the conversion of pantothenate to D-4'-phosphopantothenate in the presence of ATP.

GO terms

Biological Process

GO:0008152 metabolic process

Molecular Function

GO:0005524 ATP binding
GO:0016301 kinase activity

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.