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MicroRNA Modulation of RNA-Binding Protein Regulatory Elements

We propose that microRNAs could modulate RNA-binding protein binding sites in a dynamic manner. We suggest that the cis-regulatory code targeted by microRNAs is at least in part, the same as that read by mRNA-binding proteins. Our hypothesis predicts that microRNAs indirectly or directly bind to RNA-binding protein binding sites. Alternatively, the microRNA-mRNA interactions can themselves be the target of an mRNA-binding protein. Lastly, we envision examples where multiple mRNA regulatory elements are simultaneously influenced by microRNA-mRNA interactions such that the binding of one or more microRNA results in conformational changes in the structure of the mRNA, thereby, either revealing or masking a second regulatory element.