Membrane shape deformation induced by curvature-inducing proteins consisting of chiral crescent binding and intrinsically disordered domains

Abstract

Curvature-inducing proteins containing a Bin/Amphiphysin/Rvs domain often have intrinsically disordered domains. Recent experiments have shown that these disordered chains enhance curvature sensing and generation. Here, we report on the modification of protein-membrane interactions by disordered chains using meshless membrane simulations. The protein and bound membrane are modeled together as a chiral crescent protein rod with two excluded-volume chains. As the chain length increases, the repulsion between them reduces the cluster size of the proteins. It induces spindle-shaped vesicles and a transition between arc-shaped and circular protein assemblies in a disk-shaped vesicle. For flat membranes, an intermediate chain length induces many tubules owing to the repulsion between the protein assemblies, whereas longer chains promote perpendicular elongation of tubules. Moreover, protein rods with zero rod curvature and sufficiently long chains stabilize the spherical buds. For proteins with a negative rod curvature, an intermediate chain length induces a rugged membrane with branched protein assemblies, whereas longer chains induce the formation of tubules with periodic concave-ring structures.

arXiv comment8 pages, 9 figures

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Cited by in corpus (8)

• Binding of Curvature-Inducing Proteins onto Biomembranes
• Membrane domain formation induced by binding/unbinding of curvature-inducing molecules onto both membrane surfaces
• Curvature-sensing and generation by membrane proteins: a review
• Estimation of anisotropic bending rigidities and spontaneous curvatures of crescent curvature-inducing proteins from tethered-vesicle experimental data
• Curvature sensing of curvature-inducing proteins with internal structure
• Spatiotemporal pattern formation of membranes induced by surface molecular binding/unbinding
• Self-assembly of anisotropic particles on curved surfaces
• Growth and shrinkage of tissue sheets on substrates: buds, buckles, and pores