A nuclear role for ARGONAUTE-2 in regulation of neuronal alternative polyadenylation
Ravid, R.; Siany, A.; Rivkin, N.; Eitan, C.; Marmor-Kollet, H.; Yanowski, E.; Savidor, A.; Levin, Y.; Rot, G.; Meister, G.; Hornstein, E.
Show abstract
Argonaute 2 (AGO2), the effector protein partner of microRNAs (miRNAs) in the cytoplasmic RNA induced silencing complex, is further involved in nuclear RNA processing. However, a role for AGO2 in regulation of alternative polyadenylation was not yet demonstrated. Here, we reveal unexpected abundance of AGO2 in mouse neuronal nuclei and characterize nuclear AGO2 interactors by mass spectrometry. We discover that AGO2 broadly regulated alternative polyadenylation (APA) in neuronal cells. Specifically, we demonstrate how two isoforms of Ret mRNA, which encodes a receptor tyrosine kinase are regulated by AGO2-depenent APA, affecting downstream GDNF signaling in primary motor neurons.
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