Membrane tension controls the assembly of curvature-generating proteins.

Abstract:

:Proteins containing a Bin/Amphiphysin/Rvs (BAR) domain regulate membrane curvature in the cell. Recent simulations have revealed that BAR proteins assemble into linear aggregates, strongly affecting membrane curvature and its in-plane stress profile. Here, we explore the opposite question: do mechanical properties of the membrane impact protein association? By using coarse-grained molecular dynamics simulations, we show that increased surface tension significantly impacts the dynamics of protein assembly. While tensionless membranes promote a rapid formation of long-living linear aggregates of N-BAR proteins, increase in tension alters the geometry of protein association. At high tension, protein interactions are strongly inhibited. Increasing surface density of proteins leads to a wider range of protein association geometries, promoting the formation of meshes, which can be broken apart with membrane tension. Our work indicates that surface tension may play a key role in recruiting proteins to membrane-remodelling sites in the cell.

journal_name

Nat Commun

journal_title

Nature communications

authors

Simunovic M,Voth GA

doi

10.1038/ncomms8219

subject

Has Abstract

pub_date

2015-05-26 00:00:00

pages

7219

issn

2041-1723

pii

ncomms8219

journal_volume

6

pub_type

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