Abstract:
:The majority of mammalian genes contain one or more alternative polyadenylation sites. Choice of polyadenylation sites was suggested as one of the underlying mechanisms for generating longer/shorter transcript isoforms. Here, we demonstrate that mature mRNA transcripts can undergo additional cleavage and polyadenylation at a proximal internal site in the 3'-UTR, resulting in two stable, autonomous, RNA fragments: a coding sequence with a shorter 3'-UTR (body) and an uncapped 3'-UTR sequence downstream of the cleavage point (tail). Analyses of the human transcriptome has revealed thousands of such cleavage positions, suggesting a widespread post-transcriptional phenomenon producing thousands of stable 3'-UTR RNA tails that exist alongside their transcripts of origin. By analyzing the impact of microRNAs, we observed a significantly stronger effect for microRNA regulation at the body compared to the tail fragments. Our findings open a variety of future research prospects and call for a new perspective on 3'-UTR-dependent gene regulation.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Malka Y,Steiman-Shimony A,Rosenthal E,Argaman L,Cohen-Daniel L,Arbib E,Margalit H,Kaplan T,Berger Mdoi
10.1038/s41467-017-02099-7subject
Has Abstractpub_date
2017-12-11 00:00:00pages
2029issue
1issn
2041-1723pii
10.1038/s41467-017-02099-7journal_volume
8pub_type
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