The Enzyme Database

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Accepted name: N-acetylgalactosamine kinase
Reaction: ATP + N-acetyl-α-D-galactosamine = ADP + N-acetyl-α-D-galactosamine 1-phosphate
Other name(s): GALK2; GK2; GalNAc kinase; N-acetylgalactosamine (GalNAc)-1-phosphate kinase; ATP:N-acetyl-D-galactosamine 1-phosphotransferase
Systematic name: ATP:N-acetyl-α-D-galactosamine 1-phosphotransferase
Comments: The enzyme is highly specific for GalNAc as substrate, but has slight activity with D-galactose [2]. Requires Mg2+, Mn2+ or Co2+ for activity, with Mg2+ resulting in by far the greatest stimulation of enzyme activity.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB
1.  Pastuszak, I., Drake, R. and Elbein, A.D. Kidney N-acetylgalactosamine (GalNAc)-1-phosphate kinase, a new pathway of GalNAc activation. J. Biol. Chem. 271 (1999) 20776–20782. [DOI] [PMID: 8702831]
2.  Pastuszak, I., O'Donnell, J. and Elbein, A.D. Identification of the GalNAc kinase amino acid sequence. J. Biol. Chem. 271 (1996) 23653–23656. [DOI] [PMID: 8798585]
3.  Thoden, J.B. and Holden, H.M. The molecular architecture of human N-acetylgalactosamine kinase. J. Biol. Chem. 280 (2005) 32784–32791. [DOI] [PMID: 16006554]
[EC created 2005]

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