In enzymology, a ribulokinase (EC 126.96.36.199) 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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- Simpson FJ, Wolin MJ, Wood WA (1958). "Degradation of L-arabinose by Aerobacter aerogenes. I. A pathway involving phosphorylated intermediates". J. Biol. Chem. 230 (1): 457&ndash, 472. PMID 13502414.