The terminal loop region controls microRNA processing by Drosha and Dicer.

Abstract excerpt

microRNAs are widely expressed, ∼22-nt-long regulatory RNAs. They are first transcribed as much longer primary transcripts, which then undergo a series of processing steps to yield the single-stranded, mature microRNAs, although the mechanisms are incompletely understood. Here, we show that the terminal loop region of human primary microRNA transcripts is an important determinant of microRNA biogenesis. Mutations...

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