The F-box protein HAWAIIAN SKIRT is required for mimicry target-induced microRNA degradation in Arabidopsis
- PMID: 30565372
- DOI: 10.1111/jipb.12761
The F-box protein HAWAIIAN SKIRT is required for mimicry target-induced microRNA degradation in Arabidopsis
Abstract
Mimicry target-directed microRNA degradation is widespread and highly conserved among eukaryotes. However, little is known about its mechanism of action. In this letter, by using STTM160 (target mimic of miR160) as a reporter, we show that dysfunction of HAWAIIAN SKIRT (HWS) suppresses the pleiotropic phenotype of STTM160. Small RNA sequencing and Northern blot analyses suggested that HWS only affects a subset of microRNAs. Intriguingly, we identified a stable coexistence of miR160/miR399 and their mimicry targets within the AGO1 complex when HWS is compromised, pointing to a possible role of HWS in the clearance of RNA-induced silencing complexes associated with mimicry target.
© 2018 Institute of Botany, Chinese Academy of Sciences.
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