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膜作为第三种遗传密码。

Membranes as the third genetic code.

机构信息

Department of Chemistry, University of Idaho, Moscow, ID, 83843, USA.

出版信息

Mol Biol Rep. 2020 May;47(5):4093-4097. doi: 10.1007/s11033-020-05437-z. Epub 2020 Apr 11.

Abstract

Biological membranes and their compositions influence cellular function, age and disease states of organisms. They achieve this by effecting the outcome of bound enzymes/proteins and carbohydrate moieties. While the membrane-bound carbohydrates give rise to antigenicity, membranes impact the eventual outcome of protein structures that would function even outside their enclosure. This is achieved by membrane modulation of translational and post-translational protein folding. Thus, the eventual 3D structures and functions of proteins might not be solely dependent on their primary amino acid sequences and surrounding environments. The 3D protein structures would also depend on enclosing membrane properties such as fluidity, other intrinsic and extrinsic proteins and carbohydrate functionalities. Also, membranes moderate DNA activities with consequences on gene activation-inactivation mechanisms. Consequently, membranes are almost indispensable to the functioning of other cell compositions and serve to modulate these other components. Besides, membrane lipid compositions are also moderated by nutrition and diets and the converse is true. Thus, it could be argued that membranes are the third genetic codes. Suggestively, membranes are at the center of the interplay between nature and nurture in health and disease states.

摘要

生物膜及其组成影响着细胞的功能、生物体的衰老和疾病状态。它们通过影响结合酶/蛋白质和碳水化合物部分的结果来实现这一点。虽然膜结合的碳水化合物引起抗原性,但膜影响蛋白质结构的最终结果,即使在其封闭之外,这些蛋白质结构也会发挥作用。这是通过膜对翻译和翻译后蛋白质折叠的调节来实现的。因此,蛋白质的最终 3D 结构和功能可能不仅仅取决于其一级氨基酸序列和周围环境。3D 蛋白质结构还取决于封闭膜的特性,如流动性、其他内在和外在蛋白质以及碳水化合物功能。此外,膜还调节 DNA 活性,从而影响基因激活-失活机制。因此,膜对其他细胞成分的功能几乎是不可或缺的,并起到调节这些其他成分的作用。此外,膜脂质组成也受到营养和饮食的调节,反之亦然。因此,可以说膜是第三个遗传密码。有迹象表明,在健康和疾病状态下,膜处于自然与培养相互作用的中心。

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