Hierarchical length and sequence preferences establish a single major piRNA 3'-end.
Biological sciences
Cell biology
Molecular biology
Journal
iScience
ISSN: 2589-0042
Titre abrégé: iScience
Pays: United States
ID NLM: 101724038
Informations de publication
Date de publication:
17 Jun 2022
17 Jun 2022
Historique:
received:
22
12
2021
revised:
18
03
2022
accepted:
13
05
2022
entrez:
7
6
2022
pubmed:
8
6
2022
medline:
8
6
2022
Statut:
epublish
Résumé
PIWI-interacting RNAs (piRNAs) guard germline genomes against the deleterious action of mobile genetic elements. PiRNAs use extensive base-pairing to recognize their targets and variable 3'ends could change the specificity and efficacy of piRNA silencing. Here, we identify conserved rules that ensure the generation of a single major piRNA 3'end in flies and mice. Our data suggest that the PIWI proteins initially define a short interval on pre-piRNAs that grants access to the ZUC-processor complex. Within this Goldilocks zone, the preference to cut in front of Uridine determines the ultimate processing site. We observe a mouse-specific roadblock that relocates the Goldilocks zone and generates an opportunity for consecutive trimming. Our data reveal a conserved hierarchy between length and sequence preferences that controls the piRNA sequence space. The unanticipated precision of 3'end formation bolsters the emerging understanding that the functional piRNA sequence space is tightly controlled to ensure effective defense.
Identifiants
pubmed: 35669519
doi: 10.1016/j.isci.2022.104427
pii: S2589-0042(22)00698-8
pmc: PMC9162947
doi:
Types de publication
Journal Article
Langues
eng
Pagination
104427Déclaration de conflit d'intérêts
The authors declare no competing interests.
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