Unknown

Dataset Information

0

In vitro selection of l-DNA aptamers that bind a structured d-RNA molecule.


ABSTRACT: The development of structure-specific RNA binding reagents remains a central challenge in RNA biochemistry and drug discovery. Previously, we showed in vitro selection techniques could be used to evolve l-RNA aptamers that bind tightly to structured d-RNAs. However, whether similar RNA-binding properties can be achieved using aptamers composed of l-DNA, which has several practical advantages compared to l-RNA, remains unknown. Here, we report the discovery and characterization of the first l-DNA aptamers against a structured RNA molecule, precursor microRNA-155, thereby establishing the capacity of DNA and RNA molecules of the opposite handedness to form tight and specific 'cross-chiral' interactions with each other. l-DNA aptamers bind pre-miR-155 with low nanomolar affinity and high selectivity despite the inability of l-DNA to interact with native d-RNA via Watson-Crick base pairing. Furthermore, l-DNA aptamers inhibit Dicer-mediated processing of pre-miRNA-155. The sequence and structure of l-DNA aptamers are distinct from previously reported l-RNA aptamers against pre-miR-155, indicating that l-DNA and l-RNA interact with the same RNA sequence through unique modes of recognition. Overall, this work demonstrates that l-DNA may be pursued as an alternative to l-RNA for the generation of RNA-binding aptamers, providing a robust and practical approach for targeting structured RNAs.

SUBMITTER: Dey S 

PROVIDER: S-EPMC7038948 | BioStudies | 2020-01-01

SECONDARY ACCESSION(S): 5AdU

REPOSITORIES: biostudies

Similar Datasets

2015-01-01 | S-EPMC4703082 | BioStudies
2013-01-01 | S-EPMC3627579 | BioStudies
1000-01-01 | S-EPMC5113211 | BioStudies
2015-01-01 | S-EPMC4402540 | BioStudies
1000-01-01 | S-EPMC6332122 | BioStudies
1000-01-01 | S-EPMC5388419 | BioStudies
2007-01-01 | S-EPMC2614920 | BioStudies
2015-01-01 | S-EPMC4441765 | BioStudies
2020-01-01 | S-EPMC7251916 | BioStudies
2017-01-01 | S-EPMC5742481 | BioStudies