Thymidylate synthase (FAD)

In enzymology, a thymidylate synthase (FAD) (EC is an enzyme that catalyzes the chemical reaction

thymidylate synthase (FAD)
Flavin-dependent thymidylate synthase tetramer, Thermotoga maritima
EC number2.1.1.148
IntEnzIntEnz view
ExPASyNiceZyme view
MetaCycmetabolic pathway
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO
5,10-methylenetetrahydrofolate + dUMP + FADH2 dTMP + tetrahydrofolate + FAD

The 3 substrates of this enzyme are 5,10-methylenetetrahydrofolate, dUMP, and FADH2, whereas its 3 products are dTMP, tetrahydrofolate, and FAD.

This enzyme belongs to the family of transferases, to be specific those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is 5,10-methylenetetrahydrofolate,FADH2:dUMP C-methyltransferase. Other names in common use include Thy1, and ThyX. This enzyme participates in pyrimidine metabolism and one carbon pool by folate.

Most organisms, including humans, use the thyA- or TYMS-encoded classic thymidylate synthase whereas some bacteria use the similar flavin-dependent thymidylate synthase (FDTS) instead.[1]

Structural studiesEdit

As of late 2007, 3 structures have been solved for this class of enzymes, with PDB accession codes 2AF6, 2CFA, and 2GQ2.

See alsoEdit


  1. ^ "Folate binding site of flavin-dependent thymidylate synthase". 2012. Cite journal requires |journal= (help)
  • Myllykallio H, Lipowski G, Leduc D, Filee J, Forterre P, Liebl U (2002). "An alternative flavin-dependent mechanism for thymidylate synthesis". Science. 297 (5578): 105–7. doi:10.1126/science.1072113. PMID 12029065.