Tags: Enzyme.
In enzymology a hydroxymethylpyrimidine kinase (EC 2.7.1.49) is an enzyme that catalyzes the chemical reactionATP + 4-amino-5-hydroxymethyl-2-methylpyrimidine ADP + 4-amino-5-phosphonooxymethyl-2-methylpyrimidineThus the two substrates of this enzyme are ATP and 4-amino-5-hydroxymethyl-2-methylpyrimidine whereas its two products are ADP and 4-amino-5-phosphonooxymethyl-2-methylpyrimidine.This enzyme belongs to the family of transferases specifically those transferring phosphorus-containing groups (phosphotransferases) with an alcohol group as acceptor.