Magnesium ion catalyzed phosphorus-nitrogen bond hydrolysis in imidazolide-activated nucleotides. Relevance to template-directed synthesis of polynucleotides
作者:Anastassia Kanavarioti、Claude F. Bernasconi、Donald L. Doodokyan、Diann J. Alberas
DOI:10.1021/ja00200a053
日期:1989.8
conclusion is based on a study of the N-methylated substrates N-MeImpG and 1,2-diMeImpg, respectively, which were generated in situ by the equilibrium reaction of ImpG with N-methylimidazole and 2-MeImpG with 1,2-dimethylimidazole, respectively. In contrast, the absence of Mg2+ the reaction of S- with water competes with the reaction of SH+/- with OH-. The present study bears on the mechanism of the Mg2(+)-catalyzed
as buildingblocks. It is interesting to ask whether this is a coincidence or a consequence of the functional interplay of these biomolecules. One reaction that provides an opportunity to study this interplay is the formation of phosphoramidate-linked peptido RNA from amino acids and ribonucleotides in aqueous condensation buffer. Here we report how the diastereoselectivity of the first peptide coupling