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Actin chromobody imaging reveals sub-organellar actin dynamics

By Cara R. Schiavon, Tong Zhang, Bing Zhao, Leonardo Andrade, Melissa Wu, Tsung-Chang Sung, Yelena Dayn, Jasmine W. Feng, Omar A. Quintero, Robert Grosse, Uri Manor

Posted 15 May 2019
bioRxiv DOI: 10.1101/639278 (published DOI: 10.1038/s41592-020-0926-5)

The actin cytoskeleton plays multiple critical roles in cells, from cell migration to organelle dynamics. The small and transient actin structures regulating organelle dynamics are difficult to detect with fluorescence microscopy. We developed an approach using fluorescent protein-tagged actin nanobodies targeted to organelle membranes to enable live cell imaging of previously undetected sub-organellar actin dynamics with high spatiotemporal resolution. These probes reveal that ER-associated actin drives fission of multiple organelles including mitochondria, endosomes, lysosomes, peroxisomes, and the Golgi. ![Figure][1]</img> [1]: pending:yes

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