Specific cleavage of RNA is catalysed by short oligodeoxynucleotides termed DNAzymes. DNAzymes consist of two binding arms that hybridize to a predetermined RNA sequence and a catalytic core that cleaves a phosphodiester bond held between the binding arms. DNAzymes are exemplified by the well-studied 10-23 DNAzyme, which compared with protein ribonucleases is highly specific, albeit slow. Here we report a significant improvement in cleavage kinetics, while maintaining specificity, by incorporation of LNA (locked nucleic acid) and α-l-LNA nucleotides into the binding arms of 10-23 DNAzyme. DNAzymes modified in this way (LNAzymes) enhance cleavage of a phosphodiester bond presented in a short RNA substrate as well as in longer and highly structured substrates, and efficient cleavage is maintained from single- to multiple-turnover conditions. Analysis of the cleavage reaction indicates that substrate hybridization is boosted by the presence of the locked residues within the LNAzymes, while no apparent change occurs in the catalytic strand-scission step.
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Conference Article|
February 01 2004
Improved RNA cleavage by LNAzyme derivatives of DNAzymes
B. Vester;
B. Vester
*The Nucleic Acid Center, Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
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L.B. Lundberg;
L.B. Lundberg
*The Nucleic Acid Center, Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
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M.D. Sørensen;
M.D. Sørensen
†Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen, Denmark
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B.R. Babu;
B.R. Babu
‡The Nucleic Acid Center, Department of Chemistry, University of Southern Denmark, DK-5230 Odense M, Denmark
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S. Douthwaite;
S. Douthwaite
*The Nucleic Acid Center, Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
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J. Wengel
J. Wengel
1
‡The Nucleic Acid Center, Department of Chemistry, University of Southern Denmark, DK-5230 Odense M, Denmark
1To whom correspondence should be addressed (e-mail jwe@chem.sdu.dk).
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Publisher: Portland Press Ltd
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© 2004 Biochemical Society
2004
Biochem Soc Trans (2004) 32 (1): 37–40.
Citation
B. Vester, L.B. Lundberg, M.D. Sørensen, B.R. Babu, S. Douthwaite, J. Wengel; Improved RNA cleavage by LNAzyme derivatives of DNAzymes. Biochem Soc Trans 1 February 2004; 32 (1): 37–40. doi: https://doi.org/10.1042/bst0320037
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