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Cavin1 intrinsically disordered domains are essential for fuzzy electrostatic interactions and caveola formation
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Cavin1 intrinsically disordered domains are essential for fuzzy electrostatic interactions and caveola formation
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Journal Article
Cavin1 intrinsically disordered domains are essential for fuzzy electrostatic interactions and caveola formation
2021
Overview
Caveolae are spherically shaped nanodomains of the plasma membrane, generated by cooperative assembly of caveolin and cavin proteins. Cavins are cytosolic peripheral membrane proteins with negatively charged intrinsically disordered regions that flank positively charged α-helical regions. Here, we show that the three disordered domains of Cavin1 are essential for caveola formation and dynamic trafficking of caveolae. Electrostatic interactions between disordered regions and α-helical regions promote liquid-liquid phase separation behaviour of Cavin1 in vitro, assembly of Cavin1 oligomers in solution, generation of membrane curvature, association with caveolin-1, and Cavin1 recruitment to caveolae in cells. Removal of the first disordered region causes irreversible gel formation in vitro and results in aberrant caveola trafficking through the endosomal system. We propose a model for caveola assembly whereby fuzzy electrostatic interactions between Cavin1 and caveolin-1 proteins, combined with membrane lipid interactions, are required to generate membrane curvature and a metastable caveola coat.
Caveolae are spherical nanodomains of the plasma membrane generated by assembly of caveolin and cavin proteins. Here, the authors show that fuzzy electrostatic interactions between caveolin-1 and Cavin1 proteins, combined with membrane lipid interactions, are required to generate membrane curvature and a metastable caveola coat.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 14/19
/ 14/28
/ 82/80
/ 82/83
/ Animals
/ Assembly
/ Caveolae
/ Caveolin
/ Domains
/ Humanities and Social Sciences
/ Lipids
/ Membrane Proteins - chemistry
/ Membrane Proteins - genetics
/ Membrane Proteins - metabolism
/ Mice
/ Proteins
/ RNA-Binding Proteins - chemistry
/ RNA-Binding Proteins - genetics
/ RNA-Binding Proteins - metabolism
/ Science
