Impact of the actin cytoskeleton on cell development and function mediated via tropomyosin isoforms

The physiological function of actin filaments is challenging to dissect because of the pleiotropic impact of global disruption of the actin cytoskeleton. Tropomyosin isoforms have provided a unique opportunity to address this issue. A substantial fraction of actin filaments in animal cells consist o...

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Published in:Seminars in cell & developmental biology 2020-06, Vol.102, p.122-131
Main Authors: Hardeman, Edna C., Bryce, Nicole S., Gunning, Peter W.
Format: Article
Language:English
Subjects:
Actin Cytoskeleton - metabolism
Actin filaments
Animals
Cell migration
Focal adhesions
Glucose uptake
Humans
Mitosis
Protein Isoforms - metabolism
Stress fibres
Tropomyosin
Tropomyosin - metabolism
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description The physiological function of actin filaments is challenging to dissect because of the pleiotropic impact of global disruption of the actin cytoskeleton. Tropomyosin isoforms have provided a unique opportunity to address this issue. A substantial fraction of actin filaments in animal cells consist of co-polymers of actin with specific tropomyosin isoforms which determine the functional capacity of the filament. Genetic manipulation of the tropomyosins has revealed isoform specific roles and identified the physiological function of the different actin filament types based on their tropomyosin isoform composition. Surprisingly, there is remarkably little redundancy between the tropomyosins resulting in highly penetrant impacts of both ectopic overexpression and knockout of isoforms. The physiological roles of the tropomyosins cover a broad range from development and morphogenesis to cell migration and specialised tissue function and human diseases.
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subjects Actin Cytoskeleton - metabolism
Actin filaments
Animals
Cell migration
Focal adhesions
Glucose uptake
Humans
Mitosis
Protein Isoforms - metabolism
Stress fibres
Tropomyosin
Tropomyosin - metabolism
title Impact of the actin cytoskeleton on cell development and function mediated via tropomyosin isoforms
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