Surface properties of spider silk particles in solution.

Surface properties of spider silk particles in solution.
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溶液中蜘蛛丝颗粒的表面性质

DOI:
10.1039/c3bm60109a
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发表时间:
2013
影响因子:
6.6
通讯作者:
G. Papastavrou
G. Papastavrou
中科院分区:
工程技术2区
文献类型:
--
作者:
N. Helfricht;M. Klug;A. Mark;V. Kuznetsov;C. Blüm;T. Scheibel;G. Papastavrou

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重组蜘蛛丝蛋白,如eADF4(C16),可用于各种应用。eADF 4(C16)的胶体颗粒显示出作为药物递送系统的潜力。调整eADF4(C16)颗粒悬浮液的胶体性质代表了它们在药物制剂中使用的主要先决条件。在这项研究中,我们确定的表面特性,通过电泳迁移率和直接力测量的粒子间的相互作用。eADF4(C16)蜘蛛丝颗粒的表面电荷被确定为离子强度和pH值的函数,分别。所得的电泳迁移率可以使用奥布莱恩和白色理论来描述,并且与蛋白质的氨基酸序列直接相关。我们确定了一个模糊的蛋白质层突出到解决方案的延伸,通过直接力测量使用胶体探针技术。该软层导致电泳迁移率的偏差,并且在小的分离距离处负责额外的排斥力。这些空间力导致颗粒悬浮液在高离子强度下的稳定化。
Recombinant spider silk proteins, such as eADF4(C16), can be used for various applications. Colloidal particles of eADF4(C16) show potential as drug delivery systems. Tuning the colloidal properties of suspensions of eADF4(C16) particles represents a major prerequisite for their use in pharmaceutical formulations. In this study we determined the surface properties concerning inter-particle interactions by means of electrophoretic mobility and direct force measurements. The surface charge of eADF4(C16) spider silk particles was determined as a function of ionic strength and pH, respectively. The resulting electrophoretic mobility can be described using the O'Brien and White theory and is directly related to the amino acid sequence of the protein. We determined the extension of a fuzzy protein layer protruding into the solution by direct force measurements using a colloidal probe technique. This soft layer leads to deviations in the electrophoretic mobility and is responsible for additional repulsive forces at small separation distances. These steric forces lead to a stabilization of the particle suspension at high ionic strength.
注意:用于原子力显微镜的二氧化硅颗粒的机械和化学稳定的胶体探针。
DOI: 10.1063/1.4765299
发表时间: 2012
期刊: The Review of scientific instruments
影响因子: --
作者:
V. Kuznetsov;G. Papastavrou
通讯作者: G. Papastavrou
胶体颗粒在修饰电极上的粘附。
DOI: 10.1021/la3029726
发表时间: 2012
期刊: Langmuir : the ACS journal of surfaces and colloids
影响因子: --
作者:
V. Kuznetsov;G. Papastavrou
通讯作者: G. Papastavrou
DOI: 10.1039/c3bm60108k
发表时间: 2013-01-01
影响因子: 6.6
作者:
Neubauer, Martin P.;Bluem, Claudia;Fery, Andreas
通讯作者: Fery, Andreas
DOI: 10.1021/la9916373
发表时间: 2000-05-30
期刊: LANGMUIR
影响因子: 3.9
作者:
Borkovec, M;Behrens, SH;Semmler, M
通讯作者: Semmler, M
功能化羧甲基葡聚糖大分子的溶胀与电流体动力学特性之间的关系。
DOI: 10.1021/la700427p
发表时间: 2007
期刊: Langmuir : the ACS journal of surfaces and colloids
影响因子: --
作者:
E. Rotureau;F. Thomas;J. Duval
通讯作者: J. Duval