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首页> 外文期刊>Crystal growth & design >Control of Calcium Phosphate Nucleation and Transformation through Interactions of Enamelin and Amelogenin Exhibits the 'Goldilocks Effect'
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Control of Calcium Phosphate Nucleation and Transformation through Interactions of Enamelin and Amelogenin Exhibits the 'Goldilocks Effect'

机译:通过牙釉质和氨基脲相互作用控制磷酸钙成核和转化,呈现“金发姑娘效应”

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摘要

Although amelogenin comprises the vast majority of the matrix that templates calcium phosphate nucleation during enamel formation, other proteins, particularly enamelin, are also known to play an important role in the formation of enamel's intricate architecture. However, there is little understanding of the interplay between amelogenin and enamelin in controlling processes of mineral nucleation and growth. Here, we used an in vitro model to investigate the impact of enamelin interaction with amelogenin on calcium phosphate nucleation for a range of enamelin-to-amelogenin ratios. We found that amelogenin alone is a weak promoter of nucleation, but addition of enamelin enhanced nucleation rates in a highly nonlinear, nonmonotonic manner reaching a sharp maximum at a ratio of 1:50 enamelin/amelogenin. We provide a phenomenological model to explain this effect that assumes only isolated enamelin proteins can act as sites of enhanced nucleation, while enamelin oligomers cannot. Even when interaction is random, the model reproduces the observed behavior, suggesting a simple means to tightly control the timing and extent of nucleation and phase transformation by amelogenin and enamelin.
机译:虽然Amelogenin包含绝大多数基质,即搪瓷形成期间的磷酸钙成核的模板,其他蛋白质,特别是釉质,也是已知在珐琅质复杂结构的形成中起重要作用。然而,几乎没有了解氨因因素和搪瓷之间的相互作用,在控制矿物成核和生长过程中。在这里,我们使用体外模型来研究烯胺蛋白与Amelogen in相互作用对一系列烯胺 - 氨基脲素比的磷酸钙成核的影响。我们发现单独的Amelogenin是核心的薄弱启动子,但是在高度非线性的非单调的方式中加入烯胺增强的成核率,以1:50 enamelin / amelogenin的比例达到尖锐的最大值。我们提供了一种现象学模型来解释这种效果,该效果仅假设分离的烯胺蛋白可以充当增强成核的位点,而烯胺寡聚体不能。即使相互作用是随机的,该模型也再现观察到的行为,表明一种简单的方法,以便紧紧控制Amelogenin和enamelin的成核和相变的时间和程度。

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