Wagstaff, JM;
Planelles-Herrero, VJ;
Sharov, G;
Alnami, A;
Kozielski, F;
Derivery, E;
Löwe, J;
(2023)
Diverse cytomotive actins and tubulins share a polymerization switch mechanism conferring robust dynamics.
Science Advances
, 9
(13)
, Article eadf3021. 10.1126/sciadv.adf3021.
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Abstract
Protein filaments are used in myriads of ways to organize other molecules within cells. Some filament-forming proteins couple the hydrolysis of nucleotides to their polymerization cycle, thus powering the movement of other molecules. These filaments are termed cytomotive. Only members of the actin and tubulin protein superfamilies are known to form cytomotive filaments. We examined the basis of cytomotivity via structural studies of the polymerization cycles of actin and tubulin homologs from across the tree of life. We analyzed published data and performed structural experiments designed to disentangle functional components of these complex filament systems. Our analysis demonstrates the existence of shared subunit polymerization switches among both cytomotive actins and tubulins, i.e., the conformation of subunits switches upon assembly into filaments. These cytomotive switches can explain filament robustness, by enabling the coupling of kinetic and structural polarities required for cytomotive behaviors and by ensuring that single cytomotive filaments do not fall apart.
Type: | Article |
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Title: | Diverse cytomotive actins and tubulins share a polymerization switch mechanism conferring robust dynamics |
Location: | United States |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1126/sciadv.adf3021 |
Publisher version: | https://doi.org/10.1126/sciadv.adf3021 |
Language: | English |
Additional information: | Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). |
Keywords: | Actins, Tubulin, Polymerization, Cytoskeleton, Nucleotides, Actin Cytoskeleton |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > UCL School of Pharmacy UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > UCL School of Pharmacy > Pharma and Bio Chemistry |
URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10168959 |
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