Abstract:
:In this paper, we describe a new method for selecting RNA aptamers that cooperatively bind to two specific sites within a target RNA. We designed a selection system in which two RNAs, a target RNA and a RNA pool, were assembled by employing a pre-organized GAAA tetraloop-11-nt receptor interaction. This allows us to select the binding sequence against a targeted internal loop as well as a linker region optimized for binding of the two binding sites. After the selection, the aptamers bound with dissociation constants in the nanomolar range, thereby forming a stable complex with the target RNA. Thus this method enables identification of aptamers for a specific binding site together with a linker for cooperative binding of the two RNAs. It appears that our new method can be applied generally to select RNAs that adhere tightly to a target RNA via two specific sites. The method can also be applicable for further engineering of both natural and artificial RNAs.
journal_name
Nucleic Acids Resjournal_title
Nucleic acids researchauthors
Shiohara T,Saito H,Inoue Tdoi
10.1093/nar/gkn1012subject
Has Abstractpub_date
2009-02-01 00:00:00pages
e23issue
3eissn
0305-1048issn
1362-4962pii
gkn1012journal_volume
37pub_type
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