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. 1991 Dec 11;19(23):6519–6525. doi: 10.1093/nar/19.23.6519

Self-cleavage of a 71 nucleotide-long ribozyme derived from hepatitis delta virus genomic RNA.

G Thill 1, M Blumenfeld 1, F Lescure 1, M Vasseur 1
PMCID: PMC329210  PMID: 1754389

Abstract

Self-cleavage efficiency of ribozymes derived from hepatitis delta virus (HDV) has been shown to depend on the RNA structure, which in turn may be determined by the length of the considered sequences. Here we describe the construction and functional analysis of a 71 nucleotide-long RNA genomic fragment, Rz71, which carries an 18 nucleotide deletion in a very stable GC-rich stem-loop (stem IV), predicted to be present in several computer-derived secondary structure models. Rz71 is able to undergo self-cleavage under non-denaturing conditions (the t1/2 of the reaction at 37 degrees C is 3 min). The deletion, however, is not neutral, since under the same conditions the non-deleted ribozyme cleaves to 50% in less than 15 sec. Therefore, stem-loop IV seems to play a structural role, not being directly involved in the catalytic reaction, but contributing to the correct positioning of the catalytic core of the HDV ribozyme. Rz71 is the smallest self-cleaving sub-fragment of HDV genomic RNA reported so far.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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