Abstract:
:Circular RNAs (circRNAs) are abundant and evolutionarily conserved RNAs of largely unknown function. Here, we show that a subset of circRNAs is translated in vivo. By performing ribosome footprinting from fly heads, we demonstrate that a group of circRNAs is associated with translating ribosomes. Many of these ribo-circRNAs use the start codon of the hosting mRNA, are bound by membrane-associated ribosomes, and have evolutionarily conserved termination codons. In addition, we found that a circRNA generated from the muscleblind locus encodes a protein, which we detected in fly head extracts by mass spectrometry. Next, by performing in vivo and in vitro translation assays, we show that UTRs of ribo-circRNAs (cUTRs) allow cap-independent translation. Moreover, we found that starvation and FOXO likely regulate the translation of a circMbl isoform. Altogether, our study provides strong evidence for translation of circRNAs, revealing the existence of an unexplored layer of gene activity.
journal_name
Mol Celljournal_title
Molecular cellauthors
Pamudurti NR,Bartok O,Jens M,Ashwal-Fluss R,Stottmeister C,Ruhe L,Hanan M,Wyler E,Perez-Hernandez D,Ramberger E,Shenzis S,Samson M,Dittmar G,Landthaler M,Chekulaeva M,Rajewsky N,Kadener Sdoi
10.1016/j.molcel.2017.02.021subject
Has Abstractpub_date
2017-04-06 00:00:00pages
9-21.e7issue
1eissn
1097-2765issn
1097-4164pii
S1097-2765(17)30136-3journal_volume
66pub_type
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