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Updated: May 10, 2026

A Reporter Assay to Analyze Intronic microRNA Maturation in Mammalian Cells
Published on: June 16, 2022
Regulation of miR-17-92a cluster processing by the microRNA binding protein SND1
Eva-Marie Heinrich1, Jasmin Wagner, Marcus Krüger
1Institute of Cardiovascular Regeneration, Center for Molecular Medicine, Frankfurt, Germany.
Abstract:
MicroRNAs are small non-coding RNAs that regulate gene expression. Although all seven members of the miR-17-92a cluster originate from one primary transcript they are differentially expressed suggesting the presence of posttranscriptional regulation. By RNA pulldown and mass spectrometry we identified SND1, a known regulator of edited RNAs, interacting with pre-miR-92a and all mature miR-17-92a members. Hypoxic conditions lead to an elevation of the pri-miR-17-92a transcript and significantly increased levels of the precursors whereas the mature miRs were not significantly changed. SND1 silencing resolved this block in processing and induced an increase in mature miRs. Together, SND1 might be the missing link between hypoxia and the differential regulation of miRNA processing.
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