This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing nucleotide groups (nucleotidyltransferases). The systematic name of this enzyme class is dTTP:alpha-D-galactose-1-phosphate thymidylyltransferase. Other names in common use include dTDP galactose pyrophosphorylase, galactose 1-phosphate thymidylyl transferase, thymidine diphosphogalactose pyrophosphorylase, thymidine triphosphate:alpha-D-galactose 1-phosphate, and thymidylyltransferase. This enzyme participates in nucleotide sugars metabolism.
Pazur JH, Anderson JS (October 1963). "Thymidine triphosphate: alpha-D-galactose 1-phosphate thymidylyltransferase from Streptococcus faecalis grown on D-galactose". The Journal of Biological Chemistry. 238: 3155–60. PMID14085355.