Natural sweet macromolecules: how sweet proteins work

Natural sweet macromolecules: how sweet proteins work
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天然甜味大分子:甜味蛋白质如何发挥作用

DOI:
10.1007/s00018-006-6077-8
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发表时间:
2006
期刊:
Cellular and Molecular Life Sciences CMLS
影响因子:
--
通讯作者:
P. Temussi
P. Temussi
中科院分区:
--
文献类型:
--
作者:
P. Temussi

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摘要:一些主要在热带水果中发现的蛋白质具有独特的甜味。这些蛋白质对于味觉机制的分子理解发挥了重要作用。由于大多数甜味剂和甜味蛋白之间的大小存在巨大差异,人们相信它们必须与不同于小分子量甜味剂的受体相互作用。最近的建模研究表明,单个甜味受体具有多个活性位点,并且甜味蛋白的相互作用机制与小甜味剂有本质上的不同。小分子量甜味剂占据受体两个子域内的小受体空腔,而甜味蛋白可以根据一种称为“楔形模型”的机制与甜味受体相互作用,在该机制中它们与大的外部空腔结合。这篇综述描述了这些机制并概述了甜蛋白的历史。
Abstract.A few proteins, discovered mainly in tropical fruits, have a distinct sweet taste. These proteins have played an important role towards a molecular understanding of the mechanisms of taste. Owing to the huge difference in size, between most sweeteners and sweet proteins, it was believed that they must interact with a different receptor from that of small molecular weight sweeteners. Recent modelling studies have shown that the single sweet taste receptor has multiple active sites and that the mechanism of interaction of sweet proteins is intrinsically different from that of small sweeteners. Small molecular weight sweeteners occupy small receptor cavities inside two subdomains of the receptor, whereas sweet proteins can interact with the sweet receptor according to a mechanism called the ‘wedge model’ in which they bind to a large external cavity. This review describes these mechanisms and outlines a history of sweet proteins.
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发表时间: 2001-09-01
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影响因子: 3.5
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