Journal
DEVELOPMENT
Volume 133, Issue 20, Pages 4053-4062Publisher
COMPANY BIOLOGISTS LTD
DOI: 10.1242/dev.02572
Keywords
Drosophila; germline development; nuage; polar granule; Tudor domain; methylosome; PRMT5
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Funding
- Medical Research Council [MC_U117574558] Funding Source: Medline
- Medical Research Council [MC_U117574558] Funding Source: researchfish
- MRC [MC_U117574558] Funding Source: UKRI
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Tudor domains are found in many organisms and have been implicated in protein-protein interactions in which methylated protein substrates bind to these domains. Here, we present evidence for the involvement of specific Tudor domains in germline development. Drosophila Tudor, the founder of the Tudor domain family, contains 11 Tudor domains and is a component of polar granules and nuage, electron-dense organelles characteristic of the germline in many organisms, including mammals. In this study, we investigated whether the 11 Tudor domains fulfil specific functions for polar granule assembly, germ cell formation and abdomen formation. We find that even a small number of non-overlapping Tudor domains or a substantial reduction in overall Tudor protein is sufficient for abdomen development. In stark contrast, we find a requirement for specific Tudor domains in germ cell formation, Tudor localization and polar granule architecture. Combining genetic analysis with structural modeling of specific Tudor domains, we propose that these domains serve as 'docking platforms' for polar granule assembly.
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