Protein-fructosamine 3-kinase

Protein-fructosamine 3-kinase (EC 2.7.1.171, FN3K, fructosamine 3-kinase) is an enzyme with systematic name ATP:(protein)-N⁶-D-fructosyl-L-lysine 3-phosphotransferase.^[1]^[2] This enzyme catalyses the following chemical reaction

ATP + [protein]-N⁶-D-fructosyl-L-lysine

\rightleftharpoons

ADP + [protein]-N⁶-(3-O-phospho-D-fructosyl)-L-lysine

Nonenzymatic glycation is a factor in the pathogenesis of diabetes.

References

↑ Szwergold, B.S.; Howell, S.; Beisswenger, P.J. (2001). "Human fructosamine-3-kinase: purification, sequencing, substrate specificity, and evidence of activity in vivo". Diabetes. 50: 2139–2147. doi:10.2337/diabetes.50.9.2139. PMID 11522682.
↑ Delpierre, G.; Rider, M.H.; Collard, F.; Stroobant, V.; Vanstapel, F.; Santos, H.; Van Schaftingen, E. (2000). "Identification, cloning, and heterologous expression of a mammalian fructosamine-3-kinase". Diabetes. 49: 1627–1634. doi:10.2337/diabetes.49.10.1627. PMID 11016445.

Transferases: phosphorus-containing groups (EC 2.7)

2.7.1: OH acceptor	Hexo- Gluco- Fructo- Hepatic Galacto- Phosphofructo- 1 Liver Muscle Platelet 2 Riboflavin Shikimate Thymidine ADP-thymidine NAD⁺ Glycerol Pantothenate Mevalonate Pyruvate Deoxycytidine PFP Diacylglycerol Phosphoinositide 3 Class I PI 3 Class II PI 3 Sphingosine Glucose-1,6-bisphosphate synthase

2.7.2: COOH acceptor	Phosphoglycerate Aspartate kinase

2.7.3: N acceptor	Creatine

2.7.4: PO₄ acceptor	Phosphomevalonate Adenylate Nucleoside-diphosphate Uridylate Guanylate Thiamine-diphosphate

DNA polymerase	DNA-directed DNA polymerase I II III IV V RNA-directed DNA polymerase Reverse transcriptase Telomerase DNA nucleotidylexotransferase/Terminal deoxynucleotidyl transferase

RNA nucleotidyltransferase	RNA polymerase/DNA-directed RNA polymerase RNA polymerase I RNA polymerase II RNA polymerase III RNA polymerase IV Primase RNA-dependent RNA polymerase PNPase

Other

2.7.8: miscellaneous

Phosphatidyltransferases	CDP-diacylglycerol—glycerol-3-phosphate 3-phosphatidyltransferase CDP-diacylglycerol—serine O-phosphatidyltransferase CDP-diacylglycerol—inositol 3-phosphatidyltransferase CDP-diacylglycerol—choline O-phosphatidyltransferase

Glycosyl-1-phosphotransferase	N-acetylglucosamine-1-phosphate transferase

2.7.10-2.7.13: protein kinase
(PO₄; protein acceptor)

2.7.10: protein-tyrosine	see tyrosine kinases

2.7.11: protein-serine/threonine	see serine/threonine-specific protein kinases

2.7.12: protein-dual-specificity	see serine/threonine-specific protein kinases

2.7.13: protein-histidine	Protein-histidine pros-kinase Protein-histidine tele-kinase Histidine kinase

Enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list)

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