Drosophila miR2 primarily targets the 7 GpppN cap structure for translational repression
Understanding the molecular mechanism(s) of how miRNAs repress mRNA translation is a fundamental challenge in RNA biology. Here we use a validated cell-free system from Drosophila embryos to investigate how miR2 inhibits translation initiation. By screening a library of chemical m7GpppN cap structure analogs, we identified defined modifications of the triphosphate backbone that augment miRNA-mediated inhibition of translation initiation but are "neutral" toward general cap-dependent...[Show more]
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