Enhanced RNA cleavage within bulge-loops by an artificial ribonuclease.

Abstract:

:Cleavage of phosphodiester bonds by small ribonuclease mimics within different bulge-loops of RNA was investigated. Bulge-loops of different size (1-7 nt) and sequence composition were formed in a 3' terminal fragment of influenza virus M2 RNA (96 nt) by hybridization of complementary oligodeoxynucleotides. Small bulges (up to 4 nt) were readily formed upon oligonucleotide hybridization, whereas hybridization of the RNA to the oligonucleotides designed to produce larger bulges resulted in formation of several alternative structures. A synthetic ribonuclease mimic displaying Pyr-Pu cleavage specificity cleaved CpA motifs located within bulges faster than similar motifs within the rest of the RNA. In the presence of 10 mM MgCl2, 75% of the cleavage products resulted from the attack of this motif. Thus, selective RNA cleavage at a single target phosphodiester bond was achieved by using bulge forming oligonucleotides and a small ribonuclease A mimic.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Kuznetsova IL,Zenkova MA,Gross HJ,Vlassov VV

doi

10.1093/nar/gki264

keywords:

subject

Has Abstract

pub_date

2005-02-24 00:00:00

pages

1201-12

issue

4

eissn

0305-1048

issn

1362-4962

pii

33/4/1201

journal_volume

33

pub_type

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