Abstract: Interfering RNA molecules are now designed and produced with specificity for multiple binding sequences present in distinct genetic contexts in one or more pre-selected target RNA molecules and are used to modulate expression of the target sequences. The multitargeting interfering RNA molecules have two strands that target multiple target sites on one or more pre-selected RNA molecules. Such a multitargeting interfering RNA approach provides a powerful tool for gene regulation.

Abstract: The present invention relates to Multicomponent Nucleic Acid Enzymes (MNAzymes) and methods for their use. MNAzymes comprise two or more oligonucleotide components which self-assemble in the presence of one or more MNAzyme assembly facilitator molecules to form a catalytically active structure. Compositions for making MNAzymes, and collections of MNAzymes are provided. Also provided are methods for using MNAzymes for the detection, identification and/or quantification of one or more targets. The methods can be practiced in solution-based assays or in assays where one or more reaction components are attached to a support structure. The methods allow for multiplexing the MNAzyme detection to detect multiple targets in a single reaction. Also provided are kits for making the compositions, and for practicing the methods provided herein.