Translation of CircRNAs.

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 Cell

journal_title

Molecular cell

authors

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 S

doi

10.1016/j.molcel.2017.02.021

subject

Has Abstract

pub_date

2017-04-06 00:00:00

pages

9-21.e7

issue

1

eissn

1097-2765

issn

1097-4164

pii

S1097-2765(17)30136-3

journal_volume

66

pub_type

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