Tagatose kinase

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tagatose kinase
EC number2.7.1.101
CAS number39434-00-9
IntEnzIntEnz view
ExPASyNiceZyme view
MetaCycmetabolic pathway
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO

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

ATP + D-tagatose ADP + D-tagatose 6-phosphate

Thus, the two substrates of this enzyme are ATP and D-tagatose, whereas its two products are ADP and D-tagatose 6-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-tagatose 6-phosphotransferase. Other names in common use include tagatose 6-phosphate kinase (phosphorylating), D-tagatose 6-phosphate kinase, and tagatose-6-phosphate kinase. This enzyme participates in galactose metabolism.

Structural studies[edit]

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 2FIQ.


  • Szumiøo T (August 1981). "A novel enzyme, tagatose kinase, from Mycobacterium butyricum". Biochimica et Biophysica Acta. 660 (2): 366–70. doi:10.1016/0005-2744(81)90182-0. PMID 6269638.