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纳克尔蛋白质片段模板状阿拉戈尼特生长模板

Rebecca A Metzler¹, John Spencer Evans, Christopher E Killian

¹Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706, USA.

Journal of the American Chemical Society

|April 20, 2010

概括

一个简短的蛋白质片段N16N在体外成功诱导了阿拉戈尼特生物矿物化. 由此产生的结构模仿了天然的软体动物,这表明生物矿物形成的简化模型.

科学领域:

生物矿物化的研究研究.
材料科学是一种材料科学.
蛋白质核结晶的结晶化

背景情况:

蛋白质对生物矿物质至关重要,它指导了软体动物中的CaCO3多态选择.
自然的甲形成涉及复杂的蛋白质-多糖体组合,有利于阿拉戈尼特而不是石.
N16蛋白碎片是来自日本珍珠 (Pinctada fucata) 的.

研究的目的:

为了研究单个,短的蛋白质片段 (N16N) 的生物矿化潜力.
分析由N16N引起的*体外*生物矿物化的结构.
提出一个简化的纳克尔形成模型.

主要方法:

在实验室*生物矿物化实验中,使用N16N在酸盐生长溶液中.
使用X射线光电子发射光谱显微镜 (X-PEEM) 分析合成的生物矿物质.

主要成果:

酸N16N成功诱导了体外生物矿物化.
由此产生的模型生物矿物表现出一个带层的阿拉戈尼特结构,间隔N16N层,类似于天然.
这表明与先前已知的复杂组件相比,纳克尔形成的简化机制.

结论:

一个单一的蛋白质片段 (N16N) 可以诱导形成具有类似纳克尔结构的阿拉贡石.
这一发现支持了一个假设模型,其中特定的蛋白质和素协调骨形成 *in vivo*.
N16N作为研究蛋白质导向生物矿化的一个有价值的模型.

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