Reaction catalyzed by protein geranylgeranyltransferase type I (2.5.1.59)
+
GST-RhoA
=
+
GST-S-geranylgeranyl-RhoA
geranylgeranyl diphosphate
+
GST-RhoA
=
diphosphate
+
GST-S-geranylgeranyl-RhoA