9cxn

Structural highlights

Function

FN3K_HUMAN Fructosamine-3-kinase involved in protein deglycation by mediating phosphorylation of fructoselysine residues on glycated proteins, to generate fructoselysine-3 phosphate (PubMed:11016445, PubMed:11522682, PubMed:11975663). Fructoselysine-3 phosphate adducts are unstable and decompose under physiological conditions (PubMed:11522682, PubMed:11975663). Involved in intracellular deglycation in erythrocytes (PubMed:11975663). Involved in the response to oxidative stress by mediating deglycation of NFE2L2/NRF2, glycation impairing NFE2L2/NRF2 function (By similarity). Also able to phosphorylate psicosamines and ribulosamines (PubMed:14633848).[UniProtKB:Q9ER35]^{[1] [2] [3] [4]}

References

1. ↑ Delpierre G, Rider MH, Collard F, Stroobant V, Vanstapel F, Santos H, Van Schaftingen E. Identification, cloning, and heterologous expression of a mammalian fructosamine-3-kinase. Diabetes. 2000 Oct;49(10):1627-34. PMID:11016445 doi:10.2337/diabetes.49.10.1627
2. ↑ Szwergold BS, Howell S, Beisswenger PJ. Human fructosamine-3-kinase: purification, sequencing, substrate specificity, and evidence of activity in vivo. Diabetes. 2001 Sep;50(9):2139-47. PMID:11522682 doi:10.2337/diabetes.50.9.2139
3. ↑ Delpierre G, Collard F, Fortpied J, Van Schaftingen E. Fructosamine 3-kinase is involved in an intracellular deglycation pathway in human erythrocytes. Biochem J. 2002 Aug 1;365(Pt 3):801-8. PMID:11975663 doi:10.1042/BJ20020325
4. ↑ Collard F, Delpierre G, Stroobant V, Matthijs G, 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. 2003 Dec;52(12):2888-95. PMID:14633848 doi:10.2337/diabetes.52.12.2888