35527 PLN02327Thalassiosira pseudonana
GO:0003824 GO:0003883 GO:0006221 -
Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
CTP synthase activity
Catalysis of the reaction: ATP + UTP + NH3 = ADP + phosphate + CTP.
pyrimidine nucleotide biosynthetic process
The chemical reactions and pathways resulting in the formation of a pyrimidine nucleotide, a compound consisting of nucleoside (a pyrimidine base linked to a deoxyribose or ribose sugar) esterified with a phosphate group at either the 3' or 5'-hydroxyl group of the sugar.