Abstract:
:Animal microRNA sequences are subject to 3' nucleotide addition. Through detailed analysis of deep-sequenced short RNA data sets, we show adenylation and uridylation of miRNA is globally present and conserved across Drosophila and vertebrates. To better understand 3' adenylation function, we deep-sequenced RNA after knockdown of nucleotidyltransferase enzymes. The PAPD4 nucleotidyltransferase adenylates a wide range of miRNA loci, but adenylation does not appear to affect miRNA stability on a genome-wide scale. Adenine addition appears to reduce effectiveness of miRNA targeting of mRNA transcripts while deep-sequencing of RNA bound to immunoprecipitated Argonaute (AGO) subfamily proteins EIF2C1-EIF2C3 revealed substantial reduction of adenine addition in miRNA associated with EIF2C2 and EIF2C3. Our findings show 3' addition events are widespread and conserved across animals, PAPD4 is a primary miRNA adenylating enzyme, and suggest a role for 3' adenine addition in modulating miRNA effectiveness, possibly through interfering with incorporation into the RNA-induced silencing complex (RISC), a regulatory role that would complement the role of miRNA uridylation in blocking DICER1 uptake.
journal_name
Genome Resjournal_title
Genome researchauthors
Burroughs AM,Ando Y,de Hoon MJ,Tomaru Y,Nishibu T,Ukekawa R,Funakoshi T,Kurokawa T,Suzuki H,Hayashizaki Y,Daub COdoi
10.1101/gr.106054.110subject
Has Abstractpub_date
2010-10-01 00:00:00pages
1398-410issue
10eissn
1088-9051issn
1549-5469pii
gr.106054.110journal_volume
20pub_type
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