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Information on EC 2.7.1.171 - protein-fructosamine 3-kinase
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2.7.1.171 protein-fructosamine 3-kinaseIUBMB Comments
Non-enzymic glycation is an important factor in the pathogenesis of diabetic complications. Key early intermediates in this process are fructosamines, such as [protein]-N6-D-fructosyl-L-lysine. Fructosamine-3-kinase is part of an ATP-dependent system for removing carbohydrates from non-enzymically glycated proteins. The phosphorylation destablilizes the [protein]-N6-D-fructosyl-L-lysine adduct and leads to its spontaneous decomposition. cf. EC 2.7.1.172, protein-ribulosamine 3-kinase.
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Word Map
- 2.7.1.171
-
deglycation
- erythrocyte
- fructoselysine
-
protein-bound
- fn3krp
-
non-enzymatic
-
fn3k-related
-
amadori
-
endproducts
- dmf
-
maillard
-
protein-repairing
-
glycemia
-
ketoamine
-
3-kinase-related
- 3-deoxyglucosone
- medicine
- analysis
The expected taxonomic range for this enzyme is: Eukaryota, Bacteria
Reaction Schemes
Synonyms
fructosamine-3-kinase, fructosamine 3-kinase, fructosamine 3 kinase, 
more
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SYNONYM 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
FN3K
fructosamine 3-kinase
fructosamine-3-kinase
fructose-3-kinase
ketosamine 3-kinase 1
FN3K
-
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REACTION
REACTION DIAGRAM
COMMENTARY
ORGANISM
UNIPROT
LITERATURE
ATP + [protein]-N6-D-fructosyl-L-lysine = ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
ATP + [protein]-N6-D-fructosyl-L-lysine = ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
phosphorylation destablilizes the fructoselysine adduct and leads to its spontaneous decomposition
-
ATP + [protein]-N6-D-fructosyl-L-lysine = ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
-
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SYSTEMATIC NAME
IUBMB Comments
ATP:[protein]-N6-D-fructosyl-L-lysine 3-phosphotransferase
Non-enzymic glycation is an important factor in the pathogenesis of diabetic complications. Key early intermediates in this process are fructosamines, such as [protein]-N6-D-fructosyl-L-lysine. Fructosamine-3-kinase is part of an ATP-dependent system for removing carbohydrates from non-enzymically glycated proteins. The phosphorylation destablilizes the [protein]-N6-D-fructosyl-L-lysine adduct and leads to its spontaneous decomposition. cf. EC 2.7.1.172, protein-ribulosamine 3-kinase.
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SUBSTRATE
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
ATP + (R)-1-(5-(3-amino-4-hydroxy-3-methylbutyl)-1-methyl-1H-pyrrol-2-yl)-4-(p-tolyl)butan-1-one
ADP + (2R)-2-amino-2-methyl-4-(1-methyl)-5-[4-(4-methylphenyl)butanoyl]-1H-pyrrol-2-yl)butyl dihydrogen phosphate
CS-0777
-
-
ir
ATP + 1-deoxy-1-morpholin-4-yl-D-fructose
ADP + 1-deoxy-1-morpholin-4-yl-3-O-phosphono-D-fructose
ATP + 1-deoxy-1-morpholin-4-yl-D-psicose
ADP + 1-deoxy-1-morpholin-4-yl-3-O-phosphono-D-psicose
-
-
-
?
ATP + 1-deoxy-1-morpholin-4-yl-D-ribulose
ADP + 1-deoxy-1-morpholin-4-yl-3-O-phosphono-D-ribulose
-
-
-
?
ATP + N2-(1-deoxy-D-fructosyl)-glycine
ADP + N2-(1-deoxy-O3-phosphono-D-fructosyl)-glycine
ATP + N2-(1-deoxy-D-fructosyl)-glycylglycine
ADP + N2-(1-deoxy-O3-phosphono-D-fructosyl)-glycylglycine
-
-
-
?
ATP + N2-(1-deoxy-D-fructosyl)-L-valine
ADP + N2-(1-deoxy-O3-phosphono-D-fructosyl)-L-valine
-
-
-
?
ATP + N5-D-fructosyl-L-ornithine
ADP + N5-(O3-phosphono-D-fructosyl)-L-ornithine
-
-
-
-
?
ATP + N6-(1-deoxy-D-fructosyl)-L-lysine
ADP + N6-(1-deoxy-O3-phosphono-D-fructosyl)-L-lysine
-
-
-
?
ATP + N6-D-fructosyl-L-lysine
ADP + N6-(O3-phosphono-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + N6-D-psicosyl-L-lysine
ADP + N6-(O3-phosphono-D-psicosyl)-L-lysine
-
-
-
?
ATP + Nalpha-hippuryl-Nepsilon-(1-deoxy-D-fructosyl)lysine
ADP + Nalpha-hippuryl-Nepsilon-(1-deoxy-3-phospho-D-fructosyl)lysine
-
-
Nalpha-hippuryl-Nepsilon-(3-phosphofructosyl)lysine like other 3-phosphofructosylamines, is not stable. Terminating the enzyme reaction with trichloracetic acid stabilises the analyte
-
?
ATP + [hemoglobin]-N6-D-fructosyl-L-lysine
ADP + [hemoglobin]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
mass-spectrometric identification of the fructosamine residues that are removed from hemoglobin in intact erythrocytes as a result of the action of fructosamine-3-kinase: Lys16, Lys61 and Lys139 in the alpha-chain of hemoglobin, Val1, Lys17, Lys59, Lys66, Lys132, and Lys144 in the beta-chain of hemoglobin. Some (e.g. Lys139 in the alph-chain of hemoglobin) are readily phosphorylated to a maximal extent by fructosamine-3-kinase in vitro whereas others (e.g. Val1 in the beta-chain of hemoglobin) are slowly and only very partially phosphorylated
-
-
?
ATP + [protein]-N5-D-ribulosyl-L-lysine
ADP + [protein]-N5-(O3-phosphono-D-fructosyl)-L-lysine
proteins glycated with allose, ketosamine-3-kinase 2 plays a role in freeing proteins from ribulosamines or psicosamines, which might arise in a several step process, from the reaction of amines with glucose and/or glycolytic intermediates. This role is shared by fructosamine-3-kinase (ketosamine-3-kinase 1), which has, in addition, the unique capacity to phosphorylate fructosamines
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
ATP + [protein]-N6-D-psicosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-psicosyl)-L-lysine
ketosamine-3-kinase 2 plays a role in freeing proteins from ribulosamines or psicosamines, which might arise in a several step process, from the reaction of amines with glucose and/or glycolytic intermediates. This role is shared by fructosamine-3-kinase (ketosamine-3-kinase 1), which has, in addition, the unique capacity to phosphorylate fructosamines
-
-
?
glycated bovine serum albumin + ATP
?
derived from dialyzed glycated bovine serum albumin
-
-
?
ATP + 1-deoxy-1-morpholin-4-yl-D-fructose
ADP + 1-deoxy-1-morpholin-4-yl-3-O-phosphono-D-fructose
-
-
-
-
?
ATP + 1-deoxy-1-morpholin-4-yl-D-fructose
ADP + 1-deoxy-1-morpholin-4-yl-3-O-phosphono-D-fructose
-
-
-
?
ATP + 1-deoxy-1-morpholin-4-yl-D-fructose
ADP + 1-deoxy-1-morpholin-4-yl-3-O-phosphono-D-fructose
-
-
-
-
?
ATP + 1-deoxy-1-morpholin-4-yl-D-fructose
ADP + 1-deoxy-1-morpholin-4-yl-3-O-phosphono-D-fructose
-
-
-
?
ATP + 1-deoxy-1-morpholin-4-yl-D-fructose
ADP + 1-deoxy-1-morpholin-4-yl-3-O-phosphono-D-fructose
-
-
-
-
?
ATP + 1-deoxy-1-morpholin-4-yl-D-fructose
ADP + 1-deoxy-1-morpholin-4-yl-3-O-phosphono-D-fructose
-
-
-
?
ATP + 1-deoxy-1-morpholin-4-yl-D-fructose
ADP + 1-deoxy-1-morpholin-4-yl-3-O-phosphono-D-fructose
-
-
-
-
?
ATP + D-fructose
ADP + O3-phosphono-D-fructose
-
Vmax is 35% of the value for N6-D-fructosyl-L-lysine
-
-
?
ATP + N2-(1-deoxy-D-fructosyl)-glycine
ADP + N2-(1-deoxy-O3-phosphono-D-fructosyl)-glycine
-
-
-
?
ATP + N2-(1-deoxy-D-fructosyl)-glycine
ADP + N2-(1-deoxy-O3-phosphono-D-fructosyl)-glycine
-
-
-
?
ATP + N2-(1-deoxy-D-fructosyl)-valine
ADP + N2-(1-deoxy-O3-phosphono-D-fructosyl)-valine
-
-
-
?
ATP + N2-(1-deoxy-D-fructosyl)-valine
ADP + N2-(1-deoxy-O3-phosphono-D-fructosyl)-valine
-
-
-
?
ATP + N6-(1-deoxy-D-fructosyl)-lysine
ADP + N6-(1-deoxy-O3-phosphono-D-fructosyl)-lysine
displays about 10times less affinity than for 1-deoxy-1-morpholin-4-yl-D-fructose
-
-
?
ATP + N6-(1-deoxy-D-fructosyl)-lysine
ADP + N6-(1-deoxy-O3-phosphono-D-fructosyl)-lysine
displays about 10times less affinity than for 1-deoxy-1-morpholin-4-yl-D-fructose
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
specific role of fructosamine 3-kinase to repair protein damage caused by glucose
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
fructosamine 3-kinase is involved in an intracellular deglycation pathway in human erythrocytes. Spontaneous conversion of fructosamine 3-phosphates into 3-deoxyglucosone
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
fructosamine-3-kinase phosphorylates fructosamine residues, leading to their destabilization and their shedding from protein
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
nonenzymatic glycation is an important factor in the pathogenesis of diabetic complications. Key early intermediates in this process are fructosamines, such as protein-bound fructoselysines. The fructosamine most frequently encountered in nature is fructoselysine. Fructosamine-3-kinase is part of an ATP-dependent system for removing carbohydrates from nonenzymatically glycated proteins and protecting cells from the deleterious effects of nonenzymatic glycation
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
protein repair mechanism. Fructosamine 3-kinase phosphorylates with high affinity both low-molecular-mass and protein-bound fructosamines on the third carbon of their deoxyfructose moiety, leading to the formation of fructosamine 3-phosphates. The latter are unstable and spontaneously decompose into inorganic phosphate and 3-deoxyglucosone, with concomitant regeneration of the unglycated amine
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
repairing glucose-mediated non-enzymatic modification of proteins. The function of fructosamine-3-kinase is seen in catalysing the ATP-dependent phosphorylation of the protein-bound fructosamine (Amadori compound) fructoselysine, which is the first stable intermediate resulting from the Maillard reaction between glucose and lysine, on its 3-hydroxy group to 3-phosphofructosyllysine. The phosphorylation destabilises the fructose-amine linkage leading to a spontaneous decomposition of 3-phosphofructosyllysine to the unmodified lysine residue as well as to 3-deoxyglucosulose and inorganic phosphate
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
the physiological function of fructosamine-3-kinase may be to initiate a process leading to the deglycation of fructoselysine and of glycated proteins
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
[histone]-N6-D-fructosyl-L-lysine, [hemoglobin]-N6-D-fructosyl-L-lysine. Similar experiments with other glycated proteins, including bovine serum albumin, and lysozyme indicate that fructoselysine residues on glycated proteins are readily phosphorylated by fructosamine 3-kinase, apparently irrespective of the protein. Phosphorylation destablilizes the fructoselysine adduct and leads to its spontaneous decomposition
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
FN3K serves as a protein repair enzyme and also in the metabolism of endogenously produced free fructose-epsilon-lysine
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
mice deficient in FN3K accumulate protein-bound fructosamines and free fructoselysine, indicating that the deglycation mechanism initiated by FN3K is operative in vivo
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
specific role of fructosamine 3-kinase to repair protein damage caused by glucose
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
the physiological function of fructosamine-3-kinase may be to initiate a process leading to the deglycation of fructoselysine and of glycated proteins
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
-
fructoselysine 3-phosphate spontaneously decomposes to lysine, phosphate and 3-deoxyglucosone
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
fructoselysine 3-phosphate spontaneously decomposes to lysine, phosphate and 3-deoxyglucosone. This pathway appears to dominate 3-deoxyglucosone production in vivo, making it possible to modulate 3-deoxyglucosone levels by stimulating or inhibiting the reaction
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
specific role of fructosamine 3-kinase to repair protein damage caused by glucose
-
-
?
additional information
?
-
FN3K-RP does not phosphorylate fructoselysine, 1-deoxy-1-morpholin-4-yl-D-fructose, or lysozyme glycated with glucose
-
-
?
additional information
?
-
-
FN3K-RP does not phosphorylate fructoselysine, 1-deoxy-1-morpholin-4-yl-D-fructose, or lysozyme glycated with glucose
-
-
?
additional information
?
-
-
the kinase is specific for 1-deoxy-1-amino fructose adducts and does not catalyze phosphorylation of other monosaccharides and polyols, such as glucose, galactose, mannose, glucosamine, galactosamine, or myo-inositol
-
-
?
additional information
?
-
development of a PLC-based assay with substrate N-alpha-hippuryl-N-epsilon-psicosyllysine for the measurement of fructosamine-3-kinase (FN3K) and FN3K-related protein activity in human erythrocytes, method evaluation, overview
-
-
?
additional information
?
-
development of a simple colorimetric method for assaying FN3K activity in human body fluids
-
-
?
additional information
?
-
-
development of a simple colorimetric method for assaying FN3K activity in human body fluids
-
-
?
additional information
?
-
the fructosamines bound to Lys139alpha, located near the C-terminus of the alpha subunits, and Lys16alpha, located on a loop of the alpha subunits, are good substrates. The N-terminal glycated valine is a poor substrate, consistent with free fructosevaline being a much poorer substrate than free fructoselysine
-
-
?
additional information
?
-
-
the fructosamines bound to Lys139alpha, located near the C-terminus of the alpha subunits, and Lys16alpha, located on a loop of the alpha subunits, are good substrates. The N-terminal glycated valine is a poor substrate, consistent with free fructosevaline being a much poorer substrate than free fructoselysine
-
-
?
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NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
ATP + (R)-1-(5-(3-amino-4-hydroxy-3-methylbutyl)-1-methyl-1H-pyrrol-2-yl)-4-(p-tolyl)butan-1-one
ADP + (2R)-2-amino-2-methyl-4-(1-methyl)-5-[4-(4-methylphenyl)butanoyl]-1H-pyrrol-2-yl)butyl dihydrogen phosphate
CS-0777
-
-
ir
ATP + [protein]-N5-D-ribulosyl-L-lysine
ADP + [protein]-N5-(O3-phosphono-D-fructosyl)-L-lysine
proteins glycated with allose, ketosamine-3-kinase 2 plays a role in freeing proteins from ribulosamines or psicosamines, which might arise in a several step process, from the reaction of amines with glucose and/or glycolytic intermediates. This role is shared by fructosamine-3-kinase (ketosamine-3-kinase 1), which has, in addition, the unique capacity to phosphorylate fructosamines
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
ATP + [protein]-N6-D-psicosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-psicosyl)-L-lysine
ketosamine-3-kinase 2 plays a role in freeing proteins from ribulosamines or psicosamines, which might arise in a several step process, from the reaction of amines with glucose and/or glycolytic intermediates. This role is shared by fructosamine-3-kinase (ketosamine-3-kinase 1), which has, in addition, the unique capacity to phosphorylate fructosamines
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(3-O-phospho-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
specific role of fructosamine 3-kinase to repair protein damage caused by glucose
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
-
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
fructosamine 3-kinase is involved in an intracellular deglycation pathway in human erythrocytes. Spontaneous conversion of fructosamine 3-phosphates into 3-deoxyglucosone
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
fructosamine-3-kinase phosphorylates fructosamine residues, leading to their destabilization and their shedding from protein
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
nonenzymatic glycation is an important factor in the pathogenesis of diabetic complications. Key early intermediates in this process are fructosamines, such as protein-bound fructoselysines. The fructosamine most frequently encountered in nature is fructoselysine. Fructosamine-3-kinase is part of an ATP-dependent system for removing carbohydrates from nonenzymatically glycated proteins and protecting cells from the deleterious effects of nonenzymatic glycation
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
protein repair mechanism. Fructosamine 3-kinase phosphorylates with high affinity both low-molecular-mass and protein-bound fructosamines on the third carbon of their deoxyfructose moiety, leading to the formation of fructosamine 3-phosphates. The latter are unstable and spontaneously decompose into inorganic phosphate and 3-deoxyglucosone, with concomitant regeneration of the unglycated amine
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
repairing glucose-mediated non-enzymatic modification of proteins. The function of fructosamine-3-kinase is seen in catalysing the ATP-dependent phosphorylation of the protein-bound fructosamine (Amadori compound) fructoselysine, which is the first stable intermediate resulting from the Maillard reaction between glucose and lysine, on its 3-hydroxy group to 3-phosphofructosyllysine. The phosphorylation destabilises the fructose-amine linkage leading to a spontaneous decomposition of 3-phosphofructosyllysine to the unmodified lysine residue as well as to 3-deoxyglucosulose and inorganic phosphate
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
the physiological function of fructosamine-3-kinase may be to initiate a process leading to the deglycation of fructoselysine and of glycated proteins
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-
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ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
FN3K serves as a protein repair enzyme and also in the metabolism of endogenously produced free fructose-epsilon-lysine
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-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
mice deficient in FN3K accumulate protein-bound fructosamines and free fructoselysine, indicating that the deglycation mechanism initiated by FN3K is operative in vivo
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-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
specific role of fructosamine 3-kinase to repair protein damage caused by glucose
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
the physiological function of fructosamine-3-kinase may be to initiate a process leading to the deglycation of fructoselysine and of glycated proteins
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
fructoselysine 3-phosphate spontaneously decomposes to lysine, phosphate and 3-deoxyglucosone. This pathway appears to dominate 3-deoxyglucosone production in vivo, making it possible to modulate 3-deoxyglucosone levels by stimulating or inhibiting the reaction
-
-
?
ATP + [protein]-N6-D-fructosyl-L-lysine
ADP + [protein]-N6-(O3-phosphono-D-fructosyl)-L-lysine
-
specific role of fructosamine 3-kinase to repair protein damage caused by glucose
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-
?
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COFACTOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
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METALS and IONS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
Mg2+
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INHIBITOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
3-O-methylsorbitol-lysine
-
inhibitors based on sorbitol show competitive inhibition of the fructoseamine-3-kinase reaction but also prevent the formation of 3-deoxyglucosone, because there is no spontaneous decomposition of the product to 3-deoxyglucosone. For compounds blocked at C3, also there is no product formed. The Ki values of these compounds are approx. 0.5 mM. Although high for an in vivo drug, their apparent low toxicity make it possible to use them, at least in animals, to lower 3-deoxyglucosone levels
1-deoxy-1-morpholinofructose
substrate and competitive inhibitor of fructosamine 3-kinase, doubles the rate of accumulation of glycated haemoglobin, but markedly decreases the amount of haemoglobin containing alkali-labile phosphate
1-deoxy-1-morpholinofructose
DMF, a selective FN3K inhibitor, inhibits CS-0777 phosphorylation in erythrocytes by about 20%
additional information
neither transferrin saturation nor ferritin are confounders for the FN3K activity
-
additional information
-
neither transferrin saturation nor ferritin are confounders for the FN3K activity
-
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ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
DTT
-
the activity of the dimer species increases nearly 40fold in the presence of 2 mM the reductant, while the monomer species is active but insensitive to DTT
GSH
-
reduced glutathione, activity of the dimer species increases with increasing concentration of the physiological reductant
additional information
-
the AtFN3K wild-type dimer is activated by redox agents
-
additional information
FN3K activity is significantly correlated with HbA1c values, although the correlation between FN3K and HbA1c is weak
-
additional information
-
FN3K activity is significantly correlated with HbA1c values, although the correlation between FN3K and HbA1c is weak
-
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DISEASE
TITLE OF PUBLICATION
LINK TO PUBMED
Autoimmune Diseases
Enzymatic kinetics regarding reversible metabolism of CS-0777, a sphingosine 1-phosphate receptor modulator, via phosphorylation and dephosphorylation in humans.
Carcinogenesis
Deglycation of NRF2 by FN3K Promotes Oncogenesis and Drug Resistance.
Colorectal Neoplasms
Gene expression of fructosamine 3 kinase in patients with colorectal cancer.
Colorectal Neoplasms
Reduced fructosamine-3-kinase activity and its mRNA in human distal colorectal carcinoma.
Diabetes Complications
A new HPLC-based assay for the measurement of fructosamine-3-kinase (FN3K) and FN3K-related protein activity in human erythrocytes.
Diabetes Mellitus
A Polymorphism within the Fructosamine-3-kinase Gene is Associated with HbA1c Levels and the Onset of Type 2 Diabetes Mellitus.
Diabetes Mellitus, Type 2
A Polymorphism within the Fructosamine-3-kinase Gene is Associated with HbA1c Levels and the Onset of Type 2 Diabetes Mellitus.
Diabetic Nephropathies
Genetic variability in enzymes of metabolic pathways conferring protection against non-enzymatic glycation versus diabetes-related morbidity and mortality.
Hyperglycemia
Role of fructosamine-3-kinase in protecting against the onset of microvascular and macrovascular complications in patients with T2DM.
Lung Neoplasms
Deglycation of NRF2 by FN3K Promotes Oncogenesis and Drug Resistance.
Macular Degeneration
Fructosamine-3-Kinase as a Potential Treatment Option for Age-Related Macular Degeneration.
Neoplasms
Identification of a gene-expression signature for predicting lymph node metastasis in patients with early stage cervical carcinoma.
Neoplasms
The Taming of Nuclear Factor Erythroid-2-Related Factor-2 (Nrf2) Deglycation by Fructosamine-3-Kinase (FN3K)-Inhibitors-A Novel Strategy to Combat Cancers.
protein-fructosamine 3-kinase deficiency
Effects of fructosamine-3-kinase deficiency on function and survival of mouse pancreatic islets after prolonged culture in high glucose or ribose concentrations.
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KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
0.922
(R)-1-(5-(3-amino-4-hydroxy-3-methylbutyl)-1-methyl-1H-pyrrol-2-yl)-4-(p-tolyl)butan-1-one
pH 7.4, 37°C, recombinant enzyme FN3K
-
0.001
1-deoxy-1-morpholin-4-yl-D-fructose
pH 7.8, 30°C, erythrocyte enzyme
0.001
1-deoxy-1-morpholin-4-yl-D-fructose
pH 7.8, 30°C, recombinant enzyme
0.1
1-deoxy-1-morpholin-4-yl-D-fructose
37°C, pH not specified in the publication
additional information
additional information
Michaelis-Menten kinetics
-
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Ki VALUE [mM]
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
additional information
3-O-methylsorbitol-lysine
-
inhibitors based on sorbitol show competitive inhibition of the fructoseamine-3-kinase reaction but also prevent the formation of 3-deoxyglucosone, because there is no spontaneous decomposition of the product to 3-deoxyglucosone. For compounds blocked at C3, also there is no product formed. The Ki values of these compounds are approx. 0.5 mM. Although high for an in vivo drug, their apparent low toxicity make it possible to use them, at least in animals, to lower 3-deoxyglucosone levels
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IC50 VALUE [mM]
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
0.69
1-deoxy-1-morpholin-4-yl-D-psicose
Homo sapiens
pH 7.8, 30°C, phosphorylation of lysozyme glycated with allose
0.0036
1-deoxy-1-morpholin-4-yl-D-ribulose
Homo sapiens
pH 7.8, 30°C, phosphorylation of lysozyme glycated with allose
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SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
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pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
7.4
7.8
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TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
30
37
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ORGANISM
COMMENTARY
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
