Small, Highly Active DNAs That Hydrolyze DNA

Overview

Journal J Am Chem Soc

Publisher American Chemical Society

Specialty Chemistry

Date 2013 May 18

PMID 23679108

Citations 35

Authors

Hongzhou Gu

Kazuhiro Furukawa

Zasha Weinberg

Daniel F Berenson

Ronald R Breaker

Affiliations

Soon will be listed here.

Abstract

DNA phosphoester bonds are exceedingly resistant to hydrolysis in the absence of chemical or enzymatic catalysts. This property is particularly important for organisms with large genomes, as resistance to hydrolytic degradation permits the long-term storage of genetic information. Here we report the creation and analysis of two classes of engineered deoxyribozymes that selectively and rapidly hydrolyze DNA. Members of class I deoxyribozymes carry a catalytic core composed of only 15 conserved nucleotides and attain an observed rate constant (k(obs)) of ~1 min(-1) when incubated near neutral pH in the presence of Zn(2+). Natural DNA sequences conforming to the class I consensus sequence and structure were found that undergo hydrolysis under selection conditions (2 mM Zn(2+), pH 7), which demonstrates that the inherent structure of certain DNA regions might promote catalytic reactions, leading to genomic instability.

Citing Articles

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