A Heterochromatin-Specific RNA Export Pathway Facilitates piRNA Production.


Journal

Cell
ISSN: 1097-4172
Titre abrégé: Cell
Pays: United States
ID NLM: 0413066

Informations de publication

Date de publication:
08 08 2019
Historique:
received: 11 03 2019
revised: 18 06 2019
accepted: 29 06 2019
entrez: 10 8 2019
pubmed: 10 8 2019
medline: 10 5 2020
Statut: ppublish

Résumé

PIWI-interacting RNAs (piRNAs) guide transposon silencing in animals. The 22-30 nt piRNAs are processed in the cytoplasm from long non-coding RNAs that often lack RNA processing hallmarks of export-competent transcripts. By studying how these transcripts achieve nuclear export, we uncover an RNA export pathway specific for piRNA precursors in the Drosophila germline. This pathway requires Nxf3-Nxt1, a variant of the hetero-dimeric mRNA export receptor Nxf1-Nxt1. Nxf3 interacts with UAP56, a nuclear RNA helicase essential for mRNA export, and CG13741/Bootlegger, which recruits Nxf3-Nxt1 and UAP56 to heterochromatic piRNA source loci. Upon RNA cargo binding, Nxf3 achieves nuclear export via the exportin Crm1 and accumulates together with Bootlegger in peri-nuclear nuage, suggesting that after export, Nxf3-Bootlegger delivers precursor transcripts to the piRNA processing sites. These findings indicate that the piRNA pathway bypasses nuclear RNA surveillance systems to export unprocessed transcripts to the cytoplasm, a strategy also exploited by retroviruses.

Identifiants

pubmed: 31398345
pii: S0092-8674(19)30772-X
doi: 10.1016/j.cell.2019.07.007
pii:
doi:

Substances chimiques

Argonaute Proteins 0
Boot protein, Drosophila 0
DNA Transposable Elements 0
Drosophila Proteins 0
Heterochromatin 0
Intracellular Signaling Peptides and Proteins 0
Karyopherins 0
Nucleocytoplasmic Transport Proteins 0
Nxf3 protein, Drosophila 0
Nxt1 protein, Drosophila 0
RNA, Small Interfering 0
RNA-Binding Proteins 0
Receptors, Cytoplasmic and Nuclear 0
Hel25E protein, Drosophila EC 2.7.7.-
DEAD-box RNA Helicases EC 3.6.4.13

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

964-979.e20

Informations de copyright

Copyright © 2019 Elsevier Inc. All rights reserved.

Auteurs

Mostafa F ElMaghraby (MF)

Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Dr. Bohrgasse 3, 1030 Vienna, Austria.

Peter Refsing Andersen (PR)

Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Dr. Bohrgasse 3, 1030 Vienna, Austria. Electronic address: pra@mbg.au.dk.

Florian Pühringer (F)

Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Dr. Bohrgasse 3, 1030 Vienna, Austria.

Ulrich Hohmann (U)

Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Dr. Bohrgasse 3, 1030 Vienna, Austria; Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Campus-Vienna-Biocenter 1, 1030 Vienna, Austria.

Katharina Meixner (K)

Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Dr. Bohrgasse 3, 1030 Vienna, Austria.

Thomas Lendl (T)

Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Dr. Bohrgasse 3, 1030 Vienna, Austria; Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Campus-Vienna-Biocenter 1, 1030 Vienna, Austria.

Laszlo Tirian (L)

Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Dr. Bohrgasse 3, 1030 Vienna, Austria.

Julius Brennecke (J)

Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Dr. Bohrgasse 3, 1030 Vienna, Austria. Electronic address: julius.brennecke@imba.oeaw.ac.at.

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Classifications MeSH