Can Specific Protein-Lipid Interactions Stabilize an Active State of the Beta 2 Adrenergic Receptor?

Can Specific Protein-Lipid Interactions Stabilize an Active State of the Beta 2 Adrenergic Receptor?
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特定的蛋白质-脂质相互作用能否稳定 Beta 2 肾上腺素受体的活性状态?

DOI:
10.1016/j.bpj.2015.08.028
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发表时间:
2015
影响因子:
3.4
通讯作者:
A. Garcia
A. Garcia
中科院分区:
生物学3区
文献类型:
--
作者:
Chris Neale;H. D. Herce;R. Pomès;A. Garcia

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G 蛋白偶联受体是具有广泛生物学和药理学相关性的真核膜蛋白。与所有膜嵌入蛋白质一样,它们的位置和方向受到脂质的影响,脂质也可以通过特定的相互作用影响蛋白质功能。总计 0.25 ms 的广泛模拟揭示了膜胞质小叶中的磷脂进入激活的 β2 肾上腺素受体的空 G 蛋白结合位点并形成盐桥相互作用的过程,从而抑制离子锁形成并延长活性状态驻留时间。对嵌入阴离子膜中的受体的模拟显示脂质结合增加,为实验观察阴离子脂质可以增强受体活性提供了分子机制。视紫红质样 G 蛋白偶联受体中离子锁的精氨酸成分的保守性表明,受体螺旋 H6 和 H7 之间的细胞内脂质侵入可能是活性状态稳定的一般机制。
G-protein-coupled receptors are eukaryotic membrane proteins with broad biological and pharmacological relevance. Like all membrane-embedded proteins, their location and orientation are influenced by lipids, which can also impact protein function via specific interactions. Extensive simulations totaling 0.25 ms reveal a process in which phospholipids from the membrane's cytosolic leaflet enter the empty G-protein binding site of an activatedβ2 adrenergic receptor and form salt-bridge interactions that inhibit ionic lock formation and prolong active-state residency. Simulations of the receptor embedded in an anionic membrane show increased lipid binding, providing a molecular mechanism for the experimental observation that anionic lipids can enhance receptor activity. Conservation of the arginine component of the ionic lock among Rhodopsin-like G-protein-coupled receptors suggests that intracellular lipid ingression between receptor helices H6 and H7 may be a general mechanism for active-state stabilization.
DOI: 10.1021/jp101759q
发表时间: 2010-06-17
影响因子: 3.3
作者:
Klauda, Jeffery B.;Venable, Richard M.;Freites, J. Alfredo;O'Connor, Joseph W.;Tobias, Douglas J.;Mondragon-Ramirez, Carlos;Vorobyov, Igor;MacKerell, Alexander D., Jr.;Pastor, Richard W.
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期刊: --
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发表时间: 1983
期刊: Biochimica et biophysica acta
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