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Biological Chemistry

Editor-in-Chief: Brüne, Bernhard

Editorial Board: Buchner, Johannes / Lei, Ming / Ludwig, Stephan / Thomas, Douglas D. / Turk, Boris / Wittinghofer, Alfred

IMPACT FACTOR 2017: 3.022

CiteScore 2018: 3.09

SCImago Journal Rank (SJR) 2018: 1.482
Source Normalized Impact per Paper (SNIP) 2018: 0.820

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Volume 384, Issue 3


HIV-1 TAR as Anchoring Site for Optimized Catalytic RNAs

E. Puerta-Fernández / A. Barroso-del Jesus / C. Romero-López / A. Berzal-Herranz
Published Online: 2005-06-01 | DOI: https://doi.org/10.1515/BC.2003.040


Ribozymes have a great potential for developing specific gene silencing molecules. One of the main limitations to ensure the efficient application of ribozymes is to achieve effective binding to the target. Stem-loop domains support efficient formation of the kissing complex between natural antisense molecules and their target sequence. We have characterized catalytic antisense RNA hybrid molecules composed of a hammerhead ribozyme and a stemloop antisense domain. A series of artificial RNA substrates containing the TAR-RNA stem-loop and a target for the hammerhead ribozyme were constructed and challenged with a catalytic antisense RNA carrying the TAR complementary stemloop. The catalytic antisense RNA cleaves each of these substrates significantly more efficiently than the parental hammerhead ribozyme. Deletion of the TAR domain in the substrate abolishes the positive effect. These results suggest that the enhancement is due to the interaction of both complementary stemloop motifs. A similar improvement was corroborated when targeting the LTR region of HIV-1 with either hammerhead and hairpinbased catalytic antisense RNAs. Our results indicate that the TAR domain can be used as an anchoring site to facilitate the access of ribozymes to their specific target sequences within TAR-containing RNAs. Finally, we propose the addition of stable stem-loop motifs to the ribozyme domain as a rational way for constructing catalytic antisense RNAs.

About the article

Published Online: 2005-06-01

Published in Print: 2003-03-14

Citation Information: Biological Chemistry, Volume 384, Issue 3, Pages 343–350, ISSN (Print) 1431-6730, DOI: https://doi.org/10.1515/BC.2003.040.

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