Publication Date:
2015-05-16
Description:
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.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4545291/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4545291/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Han, Bo W -- Wang, Wei -- Li, Chengjian -- Weng, Zhiping -- Zamore, Phillip D -- GM62862/GM/NIGMS NIH HHS/ -- GM65236/GM/NIGMS NIH HHS/ -- HG007000/HG/NHGRI NIH HHS/ -- R01 GM065236/GM/NIGMS NIH HHS/ -- R37 GM062862/GM/NIGMS NIH HHS/ -- U41 HG007000/HG/NHGRI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 May 15;348(6236):817-21. doi: 10.1126/science.aaa1264.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉RNA Therapeutics Institute, Howard Hughes Medical Institute, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. ; RNA Therapeutics Institute, Howard Hughes Medical Institute, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. Program in Bioinformatics and Integrative Biology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. ; Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. Program in Bioinformatics and Integrative Biology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. zhiping.weng@umassmed.edu phillip.zamore@umassmed.edu. ; RNA Therapeutics Institute, Howard Hughes Medical Institute, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. zhiping.weng@umassmed.edu phillip.zamore@umassmed.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25977554" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Argonaute Proteins/genetics/*metabolism
;
Drosophila Proteins/genetics/*metabolism
;
Drosophila melanogaster/genetics/*metabolism
;
Endoribonucleases/genetics/*metabolism
;
Female
;
Germ Cells/metabolism
;
Male
;
Metabolic Networks and Pathways
;
Mice
;
Ovary/metabolism
;
Peptide Initiation Factors/genetics/*metabolism
;
*RNA Cleavage
;
RNA, Guide/*metabolism
;
RNA, Small Interfering/biosynthesis/*metabolism
;
*Retroelements
;
Testis/metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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