Abstract:Circular RNAs (circRNAs) have been proposed to "sponge" or block microRNAs, a property shared with linear RNAs. Alternatively, certain RNAs induce microRNA destruction through the process of Target RNA-Directed MicroRNA Degradation (TDMD). Whether both linear and circular transcripts are equivalent in driving TDMD is unknown. Here we show that RNA topology is critical for TDMD. Through a novel system that expresses a circRNA while reducing the co-expressed cognate linear RNA, we demonstrate that circRNAs canno… Show more
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