Parker, F., Chuntharpursat-Bon, E., Molloy, J.E. et al. (1 more author) (2024) Chapter 4 Using FRET to Determine How Myo10 Responds to Force in Filopodia. In: Mechanobiology. ISMB 2022, 06-09 Nov 2022, Sydney, Australia. Springer Nature , pp. 67-77. ISBN 978-3-031-45378-6
Abstract
Myosin 10 (Myo10) is an actin-based molecular motor that is essential for filopodia formation and likely senses tension through interactions with integrins in filopodial tips. It possesses a single α-helical (SAH) domain at the end of its canonical lever, which amplifies the movement of the motor. We have shown the SAH domain can contribute to lever function and possesses the properties of a constant force spring. Here we investigate whether the SAH domain plays a role in tension sensing and whether it becomes extended under load at the filopodial tip. Previously, we found that removing the entire SAH domain and short anti-parallel coiled coil (CC) region at the C-terminal end of the SAH does not prevent Myo10 from moving to filopodial tips in cells. Exploiting this, we generated recombinant forms of Myo10, in which a tension-sensing module (TSMod), comprising a FRET-pair YPet and mCherry separated by a linker sequence of amino acids was then inserted between the Myo10 motor and tail domains, so as to replace the SAH domain and CC region. The linker sequence comprised either a portion of the native SAH domain, or control sequences that were either short (x1: stiff) or long (x5: flexible) repeats of “GPGGA”. As additional controls we also placed the TSMod construct at the N-terminus, where it should not experience force. Our FRET measurements indicate that the SAH domain of Myo10 may become extended at when the protein is stalled at the filopodial tips, so the SAH domain may therefore act as a force sensor.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2024. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Myo10; Myosin; Filopodia; FRET |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Biological Sciences (Leeds) > School of Molecular and Cellular Biology (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 24 Mar 2025 10:43 |
Last Modified: | 24 Mar 2025 10:43 |
Status: | Published |
Publisher: | Springer Nature |
Identification Number: | 10.1007/978-3-031-45379-3_4 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:224702 |