Refine
Document Type
- Article (1)
- Doctoral Thesis (1)
Language
- English (2)
Has Fulltext
- yes (2)
Is part of the Bibliography
- no (2)
Keywords
- oligonucleotides (2) (remove)
Institute
The hairpin ribozyme is a small Mg2+-dependent catalytic RNA molecule able to catalyze the trans-cleavage of an RNA substrate via a reversible trans-esterification mechanism. In this study, the cleavage activities of several fragmented hairpin ribozyme systems were examined. Due to the complex catalytic structure of the hairpin ribozyme, a new boronic acid ester was used as a covalent linkage to hold the folding of the functional system. It has been demonstrated the possibility of replacing the phosphodiester linkage, at specific positions, with a boronic acid ester to restore or improve the catalytic activity of fragmented hairpin ribozyme.
Abstract
The 10–23 DNAzyme is an artificially developed Mg2+‐dependent catalytic oligonucleotide that can cleave an RNA substrate in a sequence‐specific fashion. In this study, new split 10–23 DNAzymes made of two nonfunctional fragments, one of which carries a boronic acid group at its 5′ end, while the other has a ribonucleotide at its 3′ end, were designed. Herein it is demonstrated that the addition of Mg2+ ions leads to assembly of the fragments, which in turn induces the formation of a new boronate internucleoside linkage that restores the DNAzyme activity. A systematic evaluation identified the best‐performing system. The results highlight key features for efficient control of DNAzyme activity through the formation of boronate linkages.