Reaction catalyzed by CCA tRNA nucleotidyltransferase (2.7.7.72)
a tRNA precursor
+
2
+
ATP
=
a tRNA with a 3\' CCA end
+
3
a tRNA precursor
+
2 CTP
+
ATP
=
a tRNA with a 3' CCA end
+
3 diphosphate
