Silicatein-Mediated Polycondensation of Orthosilicic Acid: Modeling of a Catalytic Mechanism Involving Ring Formation

Silicatein-Mediated Polycondensation of Orthosilicic Acid: Modeling of a Catalytic Mechanism Involving Ring Formation
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硅酸盐介导的原硅酸缩聚:涉及环形成的催化机制的建模

DOI:
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发表时间:
2010
期刊:
影响因子:
3.4
通讯作者:
Werner E. G. Müller
Werner E. G. Müller
中科院分区:
材料科学3区
文献类型:
--
作者:
H. Schröder;M. Wiens;U. Schlossmacher;David Brandt;Werner E. G. Müller

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海绵蛋白硅酸盐是第一种被描述为从单体前体(正硅烷或正硅酸)形成无机聚合物(二氧化硅)的酶。已提出的硅酸盐介导的二氧化硅形成模型主要基于合成底物的使用(正硅氧基硅烷的水解裂解为硅醇化合物)或仅考虑较不活跃的硅酸二聚体(二硅酸)的形成。在这里,我们提出了一个新的硅酸盐催化机理模型,它会导致活性环状硅酸物种(三硅氧烷环和高员硅氧烷环)的形成,从而容易地促进二氧化硅缩聚反应。
The sponge protein silicatein is the first enzyme that has been described to form an inorganic polymer (silica) from a monomeric precursor (tetraethoxysilane or orthosilicic acid). The models proposed for silicatein-mediated silica formation are mainly based on the use of synthetic substrates (hydrolytic cleavage of tetraethoxysilane to silanol compounds) or only consider the formation of less reactive silicic acid dimers (disilicic acid). Here we propose a new model for the catalytic mechanism of silicatein that leads to the formation of reactive, cyclic silicic acid species (trisiloxane rings and higher-membered siloxane rings) which easily promote the silica polycondensation reaction.
DOI: 10.1016/j.biomaterials.2008.12.021
发表时间: 2009-03
期刊: Biomaterials
影响因子: 14
作者:
M. Wiens;M. Bausen;F. Natalio;T. Link;U. Schlossmacher;W. Müller
通讯作者: M. Wiens;M. Bausen;F. Natalio;T. Link;U. Schlossmacher;W. Müller
DOI: 10.1002/9783527619443.ch4
发表时间: 2008-03
期刊: --
影响因子: --
作者:
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通讯作者: W. Müller;Xiaohong Wang;S. Belikov;W. Tremel;U. Schlossmacher;A. Natoli;David Brandt;A. Boreiko;M. Tahir;I. Müller;H. Schröder
DOI: 10.1074/jbc.m512677200
发表时间: 2006-04-28
影响因子: 4.8
作者:
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通讯作者: Müller, WEG
DOI: 10.1007/s00441-005-1141-5
发表时间: 2005-08-01
影响因子: 3.6
作者:
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通讯作者: Schröder, H