Cytokinesis occurs at the end of mitosis/meiosis wherein the cytoplasms of daughter cells are separated. Prior to abscission, an intercellular bridge containing the remaining furrowing machinery, mitotic spindle and actin cytoskeleton connects the two daughter cells. To remove this actin and allow for separation of daughter cells, Rab35 vesicles, loaded with the actin oxidizer MICAL1 and the inositol polyphosphate 5-phosphatase OCRL are recruited to the midbody in a fine-tuned spatiotemporal manner. Importantly however, the means by which these vesicles are recruited is currently unclear. Here, we demonstrate that Rab11FIP1 is recruited to the midbody after Rab35 to scaffold it at the bridge and maintain Rab35 in this region. In the absence of Rab11FIP1, Rab35 dramatically drops from the midbody, inducing defects such as cytokinetic delays and binucleation due to actin overaccumulation at the intercellular bridge, defects which can be rescued with Latrunculin A treatment. Importantly, we show that Rab11FIP1 is critical for Rab35 function in actin removal prior to cytokinesis.
Rab11FIP1 maintains Rab35 at the intercellular bridge to promote actin removal and abscission
Currently Viewing Accepted Manuscript - Newer Version Available
Nicholas V.G. Iannantuono, Gregory Emery; Rab11FIP1 maintains Rab35 at the intercellular bridge to promote actin removal and abscission. J Cell Sci 2021; jcs.244384. doi: https://doi.org/10.1242/jcs.244384
Download citation file:
Advertisement
Imaging Cell Architecture and Dynamics
We are still welcoming submissions for our upcoming Special Issue: Imaging Cell Architecture and Dynamics. This issue will be coordinated by two Guest Editors: Lucy Collinson (The Francis Crick Institute, UK) and Guillaume Jacquemet (University of Turku, Finland). Extended submission deadline: 29 March 2024.
Journal of Cell Science - more than just a journal
People who know JCS well will know that we're more than just a journal and that our community – the cell biology community – really is at the heart of everything we do. Read the full Editorial by Editor-in-Chief Michael Way and Executive Editor Seema Grewal.
2024 Journal Meeting 'Diversity and Evolution in Cell Biology'
Registration is open for our 2024 Journal Meeting Diversity and Evolution in Cell Biology, which aims to bring together evolutionary biologists and cell biologists investigating diverse aspects of cellular physiology. Submit your abstract by 5 April. Final registration deadline: 3 May 2024.
Workshop: Roles of Lipids in Nuclear Homeostasis and Genome Stability
Early-career researchers interested in the roles of nuclear lipids, apply now for one of the ten funded places at this Workshop, which will take place 14-17 October 2024. Application deadline: 19 April.
Reasons to submit to Journal of Cell Science
There are many benefits to publishing in Journal of Cell Science - read more about why you should choose JCS or visit our submission page now.