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

ATP + L(or D)-ribulose ADP + L(or D)-ribulose 5-phosphate

The 3 substrates of this enzyme are ATP, L-ribulose, and D-ribulose, whereas its 3 products are ADP, L-ribulose 5-phosphate, 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:L(or D)-ribulose 5-phosphotransferase. Other names in common use include ribulokinase (phosphorylating), and L-ribulokinase. This enzyme participates in pentose and glucuronate interconversions.


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  • BURMA DP, HORECKER BL (1958). "Pentose fermentation by Lactobacillus plantarum. III. Ribulokinase". J. Biol. Chem. 231: 1039&ndash, 51. PMID 13539035.
  • Lee N, Bendet I (1967). "Crystalline L-ribulokinase from Escherichia coli". J. Biol. Chem. 242: 2043&ndash, 50. PMID 5336963.
  • Simpson FJ, Wolin MJ and Wood WA (1958). "Degradation of L-arabinose by Aerobacter aerogenes. I. A pathway involving phosphorylated intermediates". J. Biol. Chem. 230: 457&ndash, 472.

External links

The CAS registry number for this enzyme class is 9030-57-3.

Gene Ontology (GO) codes