Species-specific polyamines from diatoms control silica morphology
Species-specific polyamines from diatoms control silica morphology
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DOI：
10.1073/pnas.260496497
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发表时间：
2000-12-19
影响因子：
11.1
通讯作者：
Sumper, M
中科院分区：
文献类型：
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作者：
Kröger, N;Deutzmann, R;Sumper, M
生物矿化有机体使用有机分子产生物种特异性矿物模式。在这里，我们描述了长链多胺（多达20个重复单元）的化学结构，它代表了硅藻生物硅的主要有机成分。这些物质是自然界中发现的最长的多胺链，并诱导二氧化硅从柠檬酸溶液中快速沉淀。每个硅藻都配备了一组物种特异性的多胺和二氧化硅沉淀蛋白，称为硅亲蛋白。沉淀二氧化硅的不同形态可以通过不同链长的多胺以及通过长链多胺和硅杂环芳烃的协同作用产生。
Biomineralizing organisms use organic molecules to generate species-specific mineral patterns. Here, we describe the chemical structure of long-chain polyamines (up to 20 repeated units), which represent the main organic constituent of diatom biosilica. These substances are the longest polyamine chains found in nature and induce rapid silica precipitation from a silicic acid solution. Each diatom is equipped with a species-specific set of polyamines and silica-precipitating proteins, which are termed silaffins. Different morphologies of precipitating silica can be generated by polyamines of different chain lengths as well as by a synergistic action of long-chain polyamines and silaffins.