Article ; Online: Phosphorylation of the F-BAR protein Hof1 drives septin ring splitting in budding yeast.
2024 Volume 15, Issue 1, Page(s) 3383
Abstract: ... essential for cytokinesis. However, the effectors of MEN in this process are unknown. Here we identify the F ... requires its F-BAR domain, suggesting that it may involve a local membrane remodelling that leads to septin ...
Abstract | A double septin ring accompanies cytokinesis in yeasts and mammalian cells. In budding yeast, reorganisation of the septin collar at the bud neck into a dynamic double ring is essential for actomyosin ring constriction and cytokinesis. Septin reorganisation requires the Mitotic Exit Network (MEN), a kinase cascade essential for cytokinesis. However, the effectors of MEN in this process are unknown. Here we identify the F-BAR protein Hof1 as a critical target of MEN in septin remodelling. Phospho-mimicking HOF1 mutant alleles overcome the inability of MEN mutants to undergo septin reorganisation by decreasing Hof1 binding to septins and facilitating its translocation to the actomyosin ring. Hof1-mediated septin rearrangement requires its F-BAR domain, suggesting that it may involve a local membrane remodelling that leads to septin reorganisation. In vitro Hof1 can induce the formation of intertwined septin bundles, while a phosphomimetic Hof1 protein has impaired septin-bundling activity. Altogether, our data indicate that Hof1 modulates septin architecture in distinct ways depending on its phosphorylation status. |
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MeSH term(s) | Saccharomyces cerevisiae Proteins/metabolism ; Saccharomyces cerevisiae Proteins/genetics ; Phosphorylation ; Septins/metabolism ; Septins/genetics ; Saccharomyces cerevisiae/metabolism ; Saccharomyces cerevisiae/genetics ; Cytokinesis ; Cell Cycle Proteins/metabolism ; Cell Cycle Proteins/genetics ; Actomyosin/metabolism ; Saccharomycetales/metabolism ; Saccharomycetales/genetics ; Mutation ; Protein Binding ; Microtubule-Associated Proteins |
Chemical Substances | Saccharomyces cerevisiae Proteins ; Septins (EC 3.6.1.-) ; HOF1 protein, S cerevisiae ; Cell Cycle Proteins ; Actomyosin (9013-26-7) ; Microtubule-Associated Proteins |
Language | English |
Publishing date | 2024-04-22 |
Publishing country | England |
Document type | Journal Article ; Research Support, Non-U.S. Gov't |
ZDB-ID | 2553671-0 |
ISSN | 2041-1723 ; 2041-1723 |
ISSN (online) | 2041-1723 |
ISSN | 2041-1723 |
DOI | 10.1038/s41467-024-47709-3 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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