We study the bending rigidity of protein-coated lipid bilayer membranes by a continuum Landau theory. For up-down symmetric membrane proteins, the bending rigidity (κ) of the membrane is found to increase linearly with protein fraction (φ) and coupling strength (λ) due to the coupling between membrane curvature and local protein fraction. We estimate the coupling strength as λ ∝ κap2/al2, where ap and al are the lateral sizes of proteins and lipids, respectively. Estimated values of λ/κ are given for various combinations of membrane proteins and lipids. We show that the presence of membrane proteins leads to thinning of the effective membrane thickness and reduces the mean layer spacing of a stack of bilayers.
|頁（從 - 到）||41-50|
|期刊||Physica A: Statistical Mechanics and its Applications|
|出版狀態||已發佈 - 2000 六月 15|
|事件||5th Taiwan International Symposium on Statistical Physics (StatPhys-Taiwan-1999) - Taipei, Taiwan|
持續時間: 1999 八月 9 → 1999 八月 12
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