Function
Catalyzes the transfer of the AMP portion of ATP to flavin mononucleotide (FMN) to produce flavin adenine dinucleotide (FAD) coenzyme. To a lesser extent, is also able to utilize other nucleotides such as CTP and GTP as substrates, producing the modified coenzymes, flavin cytosine dinucleotide (FCD) and flavin guanine dinucleotide (FGD), respectively. Does not catalyze the reverse reaction to produce FMN and ATP from FAD and PPi. Does not function as a glycerol-3-phosphate cytidylyltransferase, as previously annotated in the complete genome.