Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-9736
Authors: | Bronkhorst, Alfred W. Lee, Chop Y. Möckel, Martin M. Ruegenberg, Sabine Jesus Domingues, Antonio de Sadouki, Shéraz Piccinno, Rossana Sumiyosh, Tetsutaro Siomi, Mikiko C. Stelzl, Lukas Luck, Katja Ketting, René F. |
Title: | An extended Tudor domain within Vreteno interconnects Gtsf1L and Ago3 for piRNA biogenesis in Bombyx mori |
Online publication date: | 11-Dec-2023 |
Year of first publication: | 2023 |
Language: | english |
Abstract: | Piwi-interacting RNAs (piRNAs) direct PIWI proteins to transposons to silence them, thereby preserving genome integrity and fertility. The piRNA population can be expanded in the ping-pong amplification loop. Within this process, piRNA-associated PIWI proteins (piRISC) enter a membraneless organelle called nuage to cleave their target RNA, which is stimulated by Gtsf proteins. The resulting cleavage product gets loaded into an empty PIWI protein to form a new piRISC complex. However, for piRNA amplification to occur, the new RNA substrates, Gtsf-piRISC, and empty PIWI proteins have to be in physical proximity. In this study, we show that in silkworm cells, the Gtsf1 homolog BmGtsf1L binds to piRNA-loaded BmAgo3 and localizes to granules positive for BmAgo3 and BmVreteno. Biochemical assays further revealed that conserved residues within the unstructured tail of BmGtsf1L directly interact with BmVreteno. Using a combination of AlphaFold modeling, atomistic molecular dynamics simulations, and in vitro assays, we identified a novel binding interface on the BmVreteno-eTudor domain, which is required for BmGtsf1L binding. Our study reveals that a single eTudor domain within BmVreteno provides two binding interfaces and thereby interconnects piRNA-loaded BmAgo3 and BmGtsf1L. |
DDC: | 570 Biowissenschaften 570 Life sciences |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 10 Biologie |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-9736 |
Version: | Published version |
Publication type: | Zeitschriftenaufsatz |
License: | CC BY |
Information on rights of use: | https://creativecommons.org/licenses/by/4.0/ |
Journal: | The EMBO journal 42 |
Pages or article number: | e114072 |
Publisher: | Wiley |
Publisher place: | Hoboken, NJ u.a. |
Issue date: | 2023 |
ISSN: | 0261-4189 |
Publisher DOI: | 10.15252/embj.2023114072 |
Appears in collections: | DFG-491381577-H |
Files in This Item:
File | Description | Size | Format | ||
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an_extended_tudor_domain_with-20231211104349103.pdf | 8.4 MB | Adobe PDF | View/Open |