Ribulose-phosphate 3-epimerase (IPR026019)

Short name: Ribul_P_3_epim

Overlapping homologous superfamilies

Family relationships


Ribulose-phosphate 3-epimerase (EC: (also known as RPE, pentose-5-phosphate 3-epimerase or PPE) is the enzyme that converts D-ribulose 5-phosphate (Ru5P) into D-xylulose 5-phosphate in Calvin's reductive pentose phosphate cycle. In Ralstonia eutropha (Alcaligenes eutrophus) two copies of the gene coding for PPE are known [PMID: 1429456], one is chromosomally encoded P40117, the other one is on a plasmid Q04539. PPE has been found in a wide range of bacteria, archaebacteria, fungi and plants. All the proteins have from 209 to 241 amino acid residues. The enzyme has a TIM barrel structure.

GO terms

Biological Process

GO:0006098 pentose-phosphate shunt

Molecular Function

GO:0004750 ribulose-phosphate 3-epimerase activity

Cellular Component

No terms assigned in this category.

Contributing signatures

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