GSBS Student Publications

Title

Noncoding RNA. piRNA-guided transposon cleavage initiates Zucchini-dependent, phased piRNA production

Student Author(s)

Bo W. Han; Wei Wang

GSBS Program

Biochemistry & Molecular Pharmacology

Publication Date

2015-05-15

UMMS Affiliation

RNA Therapeutics Institute; Department of Biochemistry and Molecular Pharmacology; Program in Bioinformatics and Integrative Biology

Document Type

Article

Disciplines

Biochemistry | Bioinformatics | Genetics and Genomics

Abstract

PIWI-interacting RNAs (piRNAs) protect the animal germ line by silencing transposons. Primary piRNAs, generated from transcripts of genomic transposon "junkyards" (piRNA clusters), are amplified by the "ping-pong" pathway, yielding secondary piRNAs. We report that secondary piRNAs, bound to the PIWI protein Ago3, can initiate primary piRNA production from cleaved transposon RNAs. The first ~26 nucleotides (nt) of each cleaved RNA becomes a secondary piRNA, but the subsequent ~26 nt become the first in a series of phased primary piRNAs that bind Piwi, allowing piRNAs to spread beyond the site of RNA cleavage. The ping-pong pathway increases only the abundance of piRNAs, whereas production of phased primary piRNAs from cleaved transposon RNAs adds sequence diversity to the piRNA pool, allowing adaptation to changes in transposon sequence.

DOI of Published Version

10.1126/science.aaa1264

Source

Science. 2015 May 15;348(6236):817-21. doi: 10.1126/science.aaa1264. Link to article on publisher's site

Journal/Book/Conference Title

Science (New York, N.Y.)

Related Resources

Link to Article in PubMed

PubMed ID

25977554

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