Transverse distribution of plasma membrane bilayer cholesterol: Picking sides

Transverse distribution of plasma membrane bilayer cholesterol: Picking sides
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质膜双层胆固醇的横向分布:选择一边

DOI:
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发表时间:
2018
期刊:
Traffic : the International Journal of Intracellular Transport
影响因子:
--
通讯作者:
Y. Lange
Y. Lange
中科院分区:
--
文献类型:
--
作者:
T. Steck;Y. Lange

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质膜双层中磷脂的横向不对称性(侧面性)已被充分表征、独特、积极维持且具有重要的功能。相比之下,使用各种技术的大量研究得出结论,质膜双层胆固醇要么大部分位于外叶或内叶中,要么分布相当均匀。甾醇可能只是根据它们对不对称分布的磷脂的不同亲和力进行分配,但一些研究提出,它被主动转运到外叶。其他研究表明,甾醇在内部小叶中富集,这是由于与该侧磷脂酰乙醇胺的正相互作用或通过其中的长链鞘磷脂分子将其从外部小叶中排除而驱动的。这种不确定性提出了三个问题:质膜胆固醇的侧面是否固定在给定的细胞或细胞类型中?哺乳动物物种之间的情况普遍相同吗?它有特定的生理功能吗?这篇评论旨在解决这些问题。
The transverse asymmetry (sidedness) of phospholipids in plasma membrane bilayers is well characterized, distinctive, actively maintained and functionally important. In contrast, numerous studies using a variety of techniques have concluded that plasma membrane bilayer cholesterol is either mostly in the outer leaflet or the inner leaflet or is fairly evenly distributed. Sterols might simply partition according to their differing affinities for the asymmetrically disposed phospholipids, but some studies have proposed that it is actively transported to the outer leaflet. Other work suggests that the sterol is enriched in the inner leaflet, driven by either positive interactions with the phosphatidylethanolamine on that side or by its exclusion from the outer leaflet by the long chain sphingomyelin molecules therein. This uncertainty raises three questions: is plasma membrane cholesterol sidedness fixed in a given cell or cell type; is it generally the same among mammalian species; and does it serve specific physiological functions? This review grapples with these issues.
DOI: 10.1016/s0021-9258(19)70566-3
发表时间: 1980-10
期刊: The Journal of biological chemistry
影响因子: --
作者:
Y. Lange;H. B. Cutler;T. Steck
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DOI: --
发表时间: 1989-03
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Y. Lange;M. Swaisgood;B. Ramos;T. Steck
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Johnson BB;Heuck AP
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