The Enzyme Database

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Accepted name: protein-ribulosamine 3-kinase
Reaction: ATP + [protein]-N6-D-ribulosyl-L-lysine = ADP + [protein]-N6-(3-O-phospho-D-ribulosyl)-L-lysine
Other name(s): Fn3KRP; FN3K-related protein; FN3K-RP; ketosamine 3-kinase 2; fructosamine-3-kinase-related protein; ribulosamine/erythrulosamine 3-kinase; ribulosamine 3-kinase
Systematic name: ATP:[protein]-N6-D-ribulosyl-L-lysine 3-phosphotransferase
Comments: This enzyme plays a role in freeing proteins from ribulosamines or psicosamines, which might arise from the reaction of amines with glucose and/or glycolytic intermediates. This role is shared by EC (protein-fructosamine 3-kinase), which has, in addition, the unique capacity to phosphorylate fructosamines [1]. The plant enzyme also phosphorylates [protein]-N6-D-erythrulosyl-L-lysine [2]. No activity with [protein]-N6-D-fructosyl-L-lysine [1,2].
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB
1.  Collard, F., Delpierre, G., Stroobant, V., Matthijs, G. and Van Schaftingen, E. A mammalian protein homologous to fructosamine-3-kinase is a ketosamine-3-kinase acting on psicosamines and ribulosamines but not on fructosamines. Diabetes 52 (2003) 2888–2895. [PMID: 14633848]
2.  Fortpied, J., Gemayel, R., Stroobant, V. and van Schaftingen, E. Plant ribulosamine/erythrulosamine 3-kinase, a putative protein-repair enzyme. Biochem. J. 388 (2005) 795–802. [DOI] [PMID: 15705060]
3.  Payne, L.S., Brown, P.M., Middleditch, M., Baker, E., Cooper, G.J. and Loomes, K.M. Mapping of the ATP-binding domain of human fructosamine 3-kinase-related protein by affinity labelling with 5′-[p-(fluorosulfonyl)benzoyl]adenosine. Biochem. J. 416 (2008) 281–288. [DOI] [PMID: 18637789]
[EC created 2011]

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