Evaluating the Catalytic Potential of a General RNA-Cleaving FANA Enzyme.

Evaluating the Catalytic Potential of a General RNA-Cleaving FANA Enzyme. Chembiochem. 2019 Nov 03;: Authors: Chaput JC, Wang Y, Vorperian A, Shehabat M Abstract The discovery of synthetic genetic polymers (XNAs) with catalytic activity demonstrates that natural genetic polymers are not unique in their ability to function as enzymes. However, all known examples of in vitro selected XNA enzymes function with reduced activity relative to their natural counterparts, suggesting that XNAs may be limited in their ability to fold into structures with high catalytic activity. To explore this problem, we evaluated the catalytic potential of FANAzyme 12-7, an RNA-cleaving catalyst composed entirely of 2'-fluoroarabino nucleic acid (FANA) that was evolved to cleave RNA at a specific phosphodiester bond located between an unpaired guanine and a paired uracil in the substrate recognition arm. Here, we show that this activity extends to chimeric DNA substrates that contain a central riboguanosine (riboG) residue at the cleavage site. Surprisingly, FANAzyme 12-7 rivals known DNAzymes that were previously evolved to cleave chimeric DNA substrates under physiological conditions. These data provide convincing evidence that FANAzyme 12-7 maintains the catalytic potential of equivalent DNAzymes, which has important implications for the evolution of XNA catalysts and their contributions to future applications in synthetic biology. PMID: 31680396 ...
Source: Chembiochem - Category: Biochemistry Authors: Tags: Chembiochem Source Type: research