Line tension of branching junctions of bilayer membranes
Hiroshi Noguchi
TL;DR
This paper proposes a method to estimate the line tension of membrane branching junctions using molecular simulations, validating it against theoretical models and exploring phase transitions.
Contribution
It introduces a novel simulation-based approach to measure line tension and compares results with existing theoretical predictions.
Findings
Simulation results agree with Hamm and Kozlov's tilt model.
The method effectively estimates line tension in branched membranes.
Phase transition analysis between lamellar and inverted hexagonal phases.
Abstract
Branching of bilayer membranes appear in the inverted hexagonal phase as well as in metastable states of the lamellar phase such as membrane fusion intermediates. A method for estimating the line tension of the branching junction is proposed for molecular simulations. The line tension is calculated from the pressure tensor of equiangularly branched membranes. The simulation results agree very well with the theoretical prediction of Hamm and Kozlov's tilt model. The transition between the lamellar and inverted hexagonal phases is also investigated using the tilt model.
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