Physical Principles of Membrane Shape Regulation by the Glycocalyx.
Cell
; 177(7): 1757-1770.e21, 2019 06 13.
Article
em En
| MEDLINE
| ID: mdl-31056282
ABSTRACT
Cells bend their plasma membranes into highly curved forms to interact with the local environment, but how shape generation is regulated is not fully resolved. Here, we report a synergy between shape-generating processes in the cell interior and the external organization and composition of the cell-surface glycocalyx. Mucin biopolymers and long-chain polysaccharides within the glycocalyx can generate entropic forces that favor or disfavor the projection of spherical and finger-like extensions from the cell surface. A polymer brush model of the glycocalyx successfully predicts the effects of polymer size and cell-surface density on membrane morphologies. Specific glycocalyx compositions can also induce plasma membrane instabilities to generate more exotic undulating and pearled membrane structures and drive secretion of extracellular vesicles. Together, our results suggest a fundamental role for the glycocalyx in regulating curved membrane features that serve in communication between cells and with the extracellular matrix.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Glicoproteínas de Membrana
/
Glicocálix
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Forma Celular
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Matriz Extracelular
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Mucinas
Tipo de estudo:
Prognostic_studies
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Cell
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Estados Unidos