Biology:Fructosamine-3-kinase

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Short description: Protein-coding gene in the species Homo sapiens


A representation of the 3D structure of the protein myoglobin showing turquoise α-helices.
Generic protein structure example

Fructosamine-3-kinase is an enzyme that in humans is encoded by the FN3K gene.[1][2][3]

Function

FN3K catalyzes phosphorylation of fructosamines formed by glycation, the nonenzymatic reaction of glucose with primary amines followed by Amadori rearrangement. Phosphorylation of fructosamines may initiate metabolism of the modified amine and result in deglycation of glycated proteins.[3][4]

FN3K is responsible for the formation of fructose 3-phosphate (F3P), a compound identified in the lenses of diabetic rats. The spontaneous decomposition of F3P leads to the formation of 3-deoxyglucosone (3DG). 3DG contributes to diabetic complications. Treatment of normal and diabetic rats with an inhibitor of FN3K demonstrated a large reduction (~50%) in systemic 3DG in both groups. Removal of 3DG at its source by inhibition of FN3K is a viable option to treat diabetes related diseases since it would require a much smaller dose of drug.

References

  1. "Human fructosamine-3-kinase: purification, sequencing, substrate specificity, and evidence of activity in vivo". Diabetes 50 (9): 2139–47. Aug 2001. doi:10.2337/diabetes.50.9.2139. PMID 11522682. 
  2. "Fructosamine 3-kinase, an enzyme involved in protein deglycation". Biochem Soc Trans 31 (Pt 6): 1354–7. Dec 2003. doi:10.1042/BST0311354. PMID 14641062. 
  3. 3.0 3.1 "Entrez Gene: FN3K fructosamine 3 kinase". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=64122. 
  4. "Fructosamine 3-kinase is involved in an intracellular deglycation pathway in human erythrocytes". Biochem. J. 365 (Pt 3): 801–8. August 2002. doi:10.1042/BJ20020325. PMID 11975663. 

Further reading

See also