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Synthesis and application of isotopically labeled flavin nucleotides
Author(s) -
Mishanina Tatiana V.,
Kohen Am
Publication year - 2015
Publication title -
journal of labelled compounds and radiopharmaceuticals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 47
eISSN - 1099-1344
pISSN - 0362-4803
DOI - 10.1002/jlcr.3313
Subject(s) - flavin group , flavoprotein , chemistry , riboflavin , flavin adenine dinucleotide , flavin mononucleotide , cofactor , nucleotide , biochemistry , enzyme , stereochemistry , gene
Flavin nucleotides, i.e. flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD), are utilized as prosthetic groups and/or substrates by a myriad of proteins, ranging from metabolic enzymes to light receptors. Isotopically labeled flavins have served as invaluable tools in probing the structure and function of these flavoproteins. Here we present an enzymatic synthesis of several radio‐ and stable‐isotope labeled flavin nucleotides from commercially available labeled riboflavin and ATP. The synthetic procedure employs a bifunctional enzyme, Corynebacterium ammoniagenes FAD synthetase, that sequentially converts riboflavin to FMN and then to FAD. The final flavin product (FMN or FAD) is controlled by the concentration of ATP in the reaction. Utility of the synthesized labeled FAD cofactors is demonstrated in flavin‐dependent thymidylate synthase. The described synthetic approach can be easily applied to the production of flavin nucleotide analogues from riboflavin precursors.