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首页> 外文期刊>Journal of Materials Research >Imidazole catalyzed silica synthesis: Progress toward understanding the role of histidine in (bio)silicification
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Imidazole catalyzed silica synthesis: Progress toward understanding the role of histidine in (bio)silicification

机译：咪唑催化的二氧化硅合成：了解组氨酸在（生物）硅化中的作用的进展

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摘要

Histidine is an amino acid present in proteins involved in biosilica formation and often found in peptides identified during phage display studies but its role(s) and the extent of its involvement in the silica precipitation process is not fully understood. In this contribution we describe results from an in vitro silicification study conducted using poly-histidine (P-His) and a series of different molecular weight synthetic polymers containing the imidazole functionality (polyvinylimidazole, PVI) for comparison. We show that the presence of imidazole from PVI or P-His is able to catalyze silicic acid condensation; the effect being greater for P-His. The catalytic mechanism is proposed to involve the dual features of the imidazole group-its ability to form hydrogen bonds with silicic acid and electrostatic attraction toward oligomeric silicic acid species.
机译：组氨酸是存在于生物二氧化硅形成过程中的蛋白质中的一种氨基酸，通常在噬菌体展示研究过程中鉴定出的肽中发现，但其作用及其在二氧化硅沉淀过程中的参与程度尚不完全清楚。在这项贡献中，我们描述了使用聚组氨酸（P-His）和一系列包含咪唑官能团的不同分子量合成聚合物（聚乙烯基咪唑，PVI）进行的体外硅化研究的结果，以进行比较。我们表明，PVI或P-His中咪唑的存在能够催化硅酸的缩合。对P-His的影响更大。提出的催化机理涉及咪唑基团的双重特征：其与硅酸形成氢键的能力以及对低聚硅酸种类的静电吸引。

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  • 来源
    《Journal of Materials Research》 |2009年第5期|1700-1708|共9页
  • 作者

    Mei-Keat Liang; Siddharth V. Patwardhan; Elena N. Danilovtseva; Vadim V. Annenkov; Carole C. Perry;

  • 作者单位

    Biomolecular and Materials Interface Research Group, School of Science and Technology,Nottingham Trent University, Nottingham NG11 8NS, United Kingdom;

    Biomolecular and Materials Interface Research Group, School of Science and Technology,Nottingham Trent University, Nottingham NG11 8NS, United Kingdom;

    Limnological Institute of Siberian Branch of Russian Academy of Sciences, Irkutsk 664033, Russia;

    Limnological Institute of Siberian Branch of Russian Academy of Sciences, Irkutsk 664033, Russia;

    Biomolecular and Materials Interface Research Group, School of Science and Technology,Nottingham Trent University, Nottingham NG11 8NS, United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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