Lipid somersaults: Uncovering the mechanisms of protein-mediated lipid flipping.

Lipid somersaults: Uncovering the mechanisms of protein-mediated lipid flipping.
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DOI:
10.1016/j.plipres.2016.08.003
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发表时间:
2016-10
影响因子:
13.6
通讯作者:
Menon, Anant K.
Menon, Anant K.
中科院分区:
医学1区
文献类型:
--
作者:
Pomorski, Thomas Guenther;Menon, Anant K.

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膜脂在膜平面内迅速扩散,但它们自发翻转穿过膜双层的能力受到显著的能量屏障的阻碍。因此,极性脂质跨膜的自发翻转是非常缓慢的,即使它必须迅速发生以支持细胞生命的各个方面。在这里,我们讨论了快速翻转发生的机制,以及脂质翻转在膜稳态和细胞生长中起什么作用。我们专注于概念方面,突出从生物化学和计算机实验的机械见解,以及最近,突破性的识别一些脂质scramblases。
Membrane lipids diffuse rapidly in the plane of the membrane but their ability to flip spontaneously across a membrane bilayer is hampered by a significant energy barrier. Thus spontaneous flip-flop of polar lipids across membranes is very slow, even though it must occur rapidly to support diverse aspects of cellular life. Here we discuss the mechanisms by which rapid flip-flop occurs, and what role lipid flipping plays in membrane homeostasis and cell growth. We focus on conceptual aspects, highlighting mechanistic insights from biochemical and in silico experiments, and the recent, ground-breaking identification of a number of lipid scramblases.
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