1
|
Camp D, Venkatesh B, Solianova V, Varela L, Goult BT, Tanentzapf G. The actin binding sites of talin have both distinct and complementary roles in cell-ECM adhesion. PLoS Genet 2024; 20:e1011224. [PMID: 38662776 DOI: 10.1371/journal.pgen.1011224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 05/07/2024] [Accepted: 03/12/2024] [Indexed: 05/08/2024] Open
Abstract
Cell adhesion requires linkage of transmembrane receptors to the cytoskeleton through intermediary linker proteins. Integrin-based adhesion to the extracellular matrix (ECM) involves large adhesion complexes that contain multiple cytoskeletal adapters that connect to the actin cytoskeleton. Many of these adapters, including the essential cytoskeletal linker Talin, have been shown to contain multiple actin-binding sites (ABSs) within a single protein. To investigate the possible role of having such a variety of ways of linking integrins to the cytoskeleton, we generated mutations in multiple actin binding sites in Drosophila talin. Using this approach, we have been able to show that different actin-binding sites in talin have both unique and complementary roles in integrin-mediated adhesion. Specifically, mutations in either the C-terminal ABS3 or the centrally located ABS2 result in lethality showing that they have unique and non-redundant function in some contexts. On the other hand, flies simultaneously expressing both the ABS2 and ABS3 mutants exhibit a milder phenotype than either mutant by itself, suggesting overlap in function in other contexts. Detailed phenotypic analysis of ABS mutants elucidated the unique roles of the talin ABSs during embryonic development as well as provided support for the hypothesis that talin acts as a dimer in in vivo contexts. Overall, our work highlights how the ability of adhesion complexes to link to the cytoskeleton in multiple ways provides redundancy, and consequently robustness, but also allows a capacity for functional specialization.
Collapse
Affiliation(s)
- Darius Camp
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Bhavya Venkatesh
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Veronika Solianova
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Lorena Varela
- School of Biosciences, University of Kent, Canterbury, Kent, United Kingdom
| | - Benjamin T Goult
- School of Biosciences, University of Kent, Canterbury, Kent, United Kingdom
- Department of Biochemistry, Cell & Systems Biology, Institute of Systems, Molecular & Integrative Biology, University of Liverpool, Crown Street, Liverpool L69 7ZB, United Kingdom
| | - Guy Tanentzapf
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| |
Collapse
|
2
|
Serra-Marques A, Martin M, Katrukha EA, Grigoriev I, Peeters CAE, Liu Q, Hooikaas PJ, Yao Y, Solianova V, Smal I, Pedersen LB, Meijering E, Kapitein LC, Akhmanova A. Concerted action of kinesins KIF5B and KIF13B promotes efficient secretory vesicle transport to microtubule plus ends. eLife 2020; 9:e61302. [PMID: 33174839 PMCID: PMC7710357 DOI: 10.7554/elife.61302] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/10/2020] [Indexed: 01/30/2023] Open
Abstract
Intracellular transport relies on multiple kinesins, but it is poorly understood which kinesins are present on particular cargos, what their contributions are and whether they act simultaneously on the same cargo. Here, we show that Rab6-positive secretory vesicles are transported from the Golgi apparatus to the cell periphery by kinesin-1 KIF5B and kinesin-3 KIF13B, which determine the location of secretion events. KIF5B plays a dominant role, whereas KIF13B helps Rab6 vesicles to reach freshly polymerized microtubule ends, to which KIF5B binds poorly, likely because its cofactors, MAP7-family proteins, are slow in populating these ends. Sub-pixel localization demonstrated that during microtubule plus-end directed transport, both kinesins localize to the vesicle front and can be engaged on the same vesicle. When vesicles reverse direction, KIF13B relocates to the middle of the vesicle, while KIF5B shifts to the back, suggesting that KIF5B but not KIF13B undergoes a tug-of-war with a minus-end directed motor.
Collapse
Affiliation(s)
- Andrea Serra-Marques
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht UniversityUtrechtNetherlands
| | - Maud Martin
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht UniversityUtrechtNetherlands
| | - Eugene A Katrukha
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht UniversityUtrechtNetherlands
| | - Ilya Grigoriev
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht UniversityUtrechtNetherlands
| | - Cathelijn AE Peeters
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht UniversityUtrechtNetherlands
| | - Qingyang Liu
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht UniversityUtrechtNetherlands
| | - Peter Jan Hooikaas
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht UniversityUtrechtNetherlands
| | - Yao Yao
- Departments of Medical Informatics and Radiology, Biomedical Imaging Group Rotterdam, Erasmus University Medical CenterRotterdamNetherlands
| | - Veronika Solianova
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht UniversityUtrechtNetherlands
| | - Ihor Smal
- Departments of Medical Informatics and Radiology, Biomedical Imaging Group Rotterdam, Erasmus University Medical CenterRotterdamNetherlands
| | - Lotte B Pedersen
- Department of Biology, Section of Cell Biology and Physiology, the August Krogh Building, University of CopenhagenCopenhagenDenmark
| | - Erik Meijering
- Departments of Medical Informatics and Radiology, Biomedical Imaging Group Rotterdam, Erasmus University Medical CenterRotterdamNetherlands
| | - Lukas C Kapitein
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht UniversityUtrechtNetherlands
| | - Anna Akhmanova
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht UniversityUtrechtNetherlands
| |
Collapse
|
3
|
Camp D, Haage A, Solianova V, Castle WM, Xu QA, Lostchuck E, Goult BT, Tanentzapf G. Direct binding of Talin to Rap1 is required for cell-ECM adhesion in Drosophila. J Cell Sci 2018; 131:jcs.225144. [PMID: 30446511 DOI: 10.1242/jcs.225144] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 11/08/2018] [Indexed: 12/27/2022] Open
Abstract
Attachment of cells to the extracellular matrix (ECM) via integrins is essential for animal development and tissue maintenance. The cytoplasmic protein Talin (encoded by rhea in flies) is necessary for linking integrins to the cytoskeleton, and its recruitment is a key step in the assembly of the adhesion complex. However, the mechanisms that regulate Talin recruitment to sites of adhesion in vivo are still not well understood. Here, we show that Talin recruitment to, and maintenance at, sites of integrin-mediated adhesion requires a direct interaction between Talin and the GTPase Rap1. A mutation that blocks the direct binding of Talin to Rap1 abolished Talin recruitment to sites of adhesion and the resulting phenotype phenocopies that seen with null alleles of Talin. Moreover, we show that Rap1 activity modulates Talin recruitment to sites of adhesion via its direct binding to Talin. These results identify the direct Talin-Rap1 interaction as a key in vivo mechanism for controlling integrin-mediated cell-ECM adhesion.
Collapse
Affiliation(s)
- Darius Camp
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, Canada V6T 1Z3
| | - Amanda Haage
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, Canada V6T 1Z3
| | - Veronika Solianova
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, Canada V6T 1Z3
| | - William M Castle
- School of Biosciences, University of Kent, Canterbury CT2 7NJ, UK
| | - Qinyuan A Xu
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, Canada V6T 1Z3
| | - Emily Lostchuck
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, Canada V6T 1Z3
| | - Benjamin T Goult
- School of Biosciences, University of Kent, Canterbury CT2 7NJ, UK
| | - Guy Tanentzapf
- Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, Canada V6T 1Z3
| |
Collapse
|