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In enzymology, a D-ribulokinase (EC is an enzyme that catalyzes the chemical reaction

ATP + D-ribulose ADP + D-ribulose 5-phosphate

Thus, the two substrates of this enzyme are ATP and D-ribulose, whereas its two products are ADP and D-ribulose 5-phosphate.

This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing groups (phosphotransferases) with an alcohol group as acceptor. The systematic name of this enzyme class is ATP:D-ribulose 5-phosphotransferase. This enzyme is also called D-ribulokinase (phosphorylating). This enzyme participates in pentose and glucuronate interconversions.


  • IUBMB entry for
  • BRENDA references for (Recommended.)
  • PubMed references for
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  • FROMM HJ (1959). "D-Ribulokinase from Aerobacter aerogenes". J. Biol. Chem. 234: 3097&ndash, 101. PMID 13825363.

External links

The CAS registry number for this enzyme class is 9026-40-8.

Gene Ontology (GO) codes