Journal
EMBO REPORTS
Volume 18, Issue 10, Pages 1762-1774Publisher
WILEY
DOI: 10.15252/embr.201744334
Keywords
Calm3; intron; neuronal activity; neuronal mRNA regulation; Stau2
Categories
Funding
- DFG [SPP1738, Kie 502/2-1, FOR2333, Kie 502/3-1, INST 86/1581-1]
- Austrian Science Funds [P20583-B12, I590-B09, SFB F43]
- Schram Foundation
- HFSP Network grant [RGP24/2008]
- Wellcome Trust [103760/Z/14/Z]
- Nakajima Foundation
- Austrian Science Fund (FWF) [P20583] Funding Source: Austrian Science Fund (FWF)
- Wellcome Trust [103760/Z/14/Z] Funding Source: researchfish
Ask authors/readers for more resources
Dendritic localization and hence local mRNA translation contributes to synaptic plasticity in neurons. Staufen2 (Stau2) is a well-known neuronal double-stranded RNA-binding protein (dsRBP) that has been implicated in dendritic mRNA localization. The specificity of Stau2 binding to its target mRNAs remains elusive. Using individual-nucleotide resolution CLIP (iCLIP), we identified significantly enriched Stau2 binding to the 3-UTRs of 356 transcripts. In 28 (7.9%) of those, binding occurred to a retained intron in their 3-UTR. The strongest bound 3-UTR intron was present in the longest isoform of Calmodulin 3 (Calm3(L)) mRNA. Calm3(L) 3-UTR contains six Stau2 crosslink clusters, four of which are in this retained 3-UTR intron. The Calm3(L) mRNA localized to neuronal dendrites, while lack of the 3-UTR intron impaired its dendritic localization. Importantly, Stau2 mediates this dendritic localization via the 3-UTR intron, without affecting its stability. Also, NMDA-mediated synaptic activity specifically promoted the dendritic mRNA localization of the Calm3(L) isoform, while inhibition of synaptic activity reduced it substantially. Together, our results identify the retained intron as a critical element in recruiting Stau2, which then allows for the localization of Calm3(L) mRNA to distal dendrites.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available