RRC ID 53471
Author Tang W, Tu S, Lee HC, Weng Z, Mello CC.
Title The RNase PARN-1 Trims piRNA 3' Ends to Promote Transcriptome Surveillance in C. elegans.
Journal Cell
Abstract Piwi-interacting RNAs (piRNAs) engage Piwi proteins to suppress transposons and are essential for fertility in diverse organisms. An interesting feature of piRNAs is that, while piRNA lengths are stereotypical within a species, they can differ widely between species. For example, piRNAs are mainly 29 and 30 nucleotides in humans, 24 to 30 nucleotides in D. melanogaster, and uniformly 21 nucleotides in C. elegans. However, how piRNA length is determined and whether length impacts function remains unknown. Here, we show that C. elegans deficient for PARN-1, a conserved RNase, accumulate untrimmed piRNAs with 3' extensions. Surprisingly, these longer piRNAs are stable and associate with the Piwi protein PRG-1 but fail to robustly recruit downstream silencing factors. Our findings identify PARN-1 as a key regulator of piRNA length in C. elegans and suggest that length is regulated to promote efficient transcriptome surveillance.
Volume 164(5)
Pages 974-84
Published 2016-2-25
DOI 10.1016/j.cell.2016.02.008
PII S0092-8674(16)30074-5
PMID 26919432
IF 31.398
C.elegans tm872 tm1339 tm4477 tm869