Ribonuclease mimic: Zn2+ promoted cleavage of C8-histamino-r(UpA) proceeds through 2′,3′-cUMP as intermediate
Abstract
The designed ribodinucleotide 1 containing a proximal imidazole, in the presence of ZnCl2, undergoes self hydrolysis faster than unmodified r(UpA); like its enzymatic counterpart, this reaction goes through the same steps of initial transesterification to 2′,3′-cUMP followed by hydrolysis to 2′- or 3′-UMP.