Silica condensation by a silicatein α homologue involves surface-induced transition to a stable structural intermediate forming a saturated monolayer.
Silica condensation by a silicatein α homologue involves surface-induced transition to a stable structural intermediate forming a saturated monolayer.
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硅酸盐α同系物的二氧化硅缩合涉及表面诱导转变为形成饱和单层的稳定结构中间体。
DOI:
10.1021/bm100932e
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发表时间:
2010
影响因子:
6.2
通讯作者:
C. F. van der Walle
中科院分区:
文献类型:
--
作者:
Siddharth V. Patwardhan;S. Holt;S. Kelly;M. Kreiner;C. Perry;C. F. van der Walle
Silicatein α exists within the protein filament of silica spicules of the marine sponge Tethya aurantium in a predominantly β-sheet structure. However, it is produced in a soluble form with mixed α-helix/β-sheet structure akin to its cathepsin L homologue. To understand this conformational transition in the context of enzyme catalyzed silica condensation, we used a functional, recombinant silicatein α termed 4SER. In solution, 4SER becomes conformationally unstable at pH 7 and readily unfolds to a soluble β-sheet intermediate, losing the majority of its helical structure. This β-sheet intermediate is present following adsorption of 4SER to a silica surface from solution. 4SER is particularly surface active, forming a near saturated monolayer on SiO2 from low bulk concentrations, without transition to multilayers at high bulk concentrations. The adsorbed intermediate remains stable during silica condensation and drying. We propose that the β-sheet structure for silicatein α in marine sponge spicules represents a stable structural intermediate, formed upon adsorption to the silica surface.
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
影响因子:
4.1
作者:
Schröder, HC;Perovic-Ottstadt, S;Müller, WEG
通讯作者:
Müller, WEG
影响因子:
3.6
作者:
Müller, WEG;Rothenberger, M;Schröder, H
通讯作者:
Schröder, H