L-ribulose-5-phosphate 4-epimerase

In enzymology, a L-ribulose-5-phosphate 4-epimerase (EC number|5.1.3.4) is an enzyme that catalyzes the chemical reaction

:L-ribulose 5-phosphate $ightleftharpoons$ D-xylulose 5-phosphate

Hence, this enzyme has one substrate, L-ribulose 5-phosphate, and one product, D-xylulose 5-phosphate.

This enzyme belongs to the family of isomerases, specifically those racemases and epimerases acting on carbohydrates and derivatives. The systematic name of this enzyme class is L-ribulose-5-phosphate 4-epimerase. Other names in common use include phosphoribulose isomerase, ribulose phosphate 4-epimerase, L-ribulose-phosphate 4-epimerase, L-ribulose 5-phosphate 4-epimerase, AraD, and L-Ru5P. This enzyme participates in pentose and glucuronate interconversions and ascorbate and aldarate metabolism.

tructural studies

As of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes PDB link|1JDI and PDB link|1K0W.

References

*
*
*
*
*
*
*

External links

::"The CAS registry number for this enzyme class is CAS registry|9024-19-5."

Gene Ontology (GO) codes