To kill a microRNA: emerging concepts in target-directed microRNA degradation.

TitleTo kill a microRNA: emerging concepts in target-directed microRNA degradation.
Publication TypeJournal Article
Year of Publication2024
AuthorsBuhagiar AF, Kleaveland B
JournalNucleic Acids Res
Date Published2024 Feb 28
KeywordsAnimals, Argonaute Proteins, Binding Sites, MicroRNAs, Proteolysis, RNA Stability, Ubiquitination

MicroRNAs (miRNAs) guide Argonaute (AGO) proteins to bind mRNA targets. Although most targets are destabilized by miRNA-AGO binding, some targets induce degradation of the miRNA instead. These special targets are also referred to as trigger RNAs. All triggers identified thus far have binding sites with greater complementarity to the miRNA than typical target sites. Target-directed miRNA degradation (TDMD) occurs when trigger RNAs bind the miRNA-AGO complex and recruit the ZSWIM8 E3 ubiquitin ligase, leading to AGO ubiquitination and proteolysis and subsequent miRNA destruction. More than 100 different miRNAs are regulated by ZSWIM8 in bilaterian animals, and hundreds of trigger RNAs have been predicted computationally. Disruption of individual trigger RNAs or ZSWIM8 has uncovered important developmental and physiologic roles for TDMD across a variety of model organisms and cell types. In this review, we highlight recent progress in understanding the mechanistic basis and functions of TDMD, describe common features of trigger RNAs, outline best practices for validating trigger RNAs, and discuss outstanding questions in the field.

Alternate JournalNucleic Acids Res
PubMed ID38224449
PubMed Central IDPMC10899785
Grant ListR35 GM147463 / GM / NIGMS NIH HHS / United States
R35GM147463 / GM / NIGMS NIH HHS / United States
Related Lab: 
Related Faculty: 
Benjamin Kleaveland, M.D., Ph.D.

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