Molecular Basis for Vitamin A Uptake and Storage in Vertebrates.

Molecular Basis for Vitamin A Uptake and Storage in Vertebrates.
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DOI:
10.3390/nu8110676
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发表时间:
2016-10-26
期刊:
影响因子:
5.9
通讯作者:
Golczak M
Golczak M
中科院分区:
医学2区
文献类型:
--
作者:
Chelstowska S;Widjaja-Adhi MA;Silvaroli JA;Golczak M

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在体内储存和分配维生素A的能力是主要的进化适应,使脊椎动物在营养缺乏期间保持类维A酸类功能,并获得新的代谢途径,从而能够独立于光产生11-顺式维甲酸。这些过程在很大程度上依赖于将维生素A酯化的酶以及相关的维甲酸结合蛋白。尽管视黄酸酯对维生素A动态平衡的重要性已经得到了很好的证实,但直到最近,视黄醇酯化酶活性的分子基础还不清楚。在这篇综述中,我们将通过目前对维生素A酯化酶的生化和结构研究的棱镜来观察维甲酸的吸收。我们描述了使维甲酸储存成为可能的分子适应,并描述了在选择性蛋白质中发现的突变可能影响受影响患者的维生素A稳态的机制。
The ability to store and distribute vitamin A inside the body is the main evolutionary adaptation that allows vertebrates to maintain retinoid functions during nutritional deficiencies and to acquire new metabolic pathways enabling light-independent production of 11-cis retinoids. These processes greatly depend on enzymes that esterify vitamin A as well as associated retinoid binding proteins. Although the significance of retinyl esters for vitamin A homeostasis is well established, until recently, the molecular basis for the retinol esterification enzymatic activity was unknown. In this review, we will look at retinoid absorption through the prism of current biochemical and structural studies on vitamin A esterifying enzymes. We describe molecular adaptations that enable retinoid storage and delineate mechanisms in which mutations found in selective proteins might influence vitamin A homeostasis in affected patients.
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