Please use this identifier to cite or link to this item:
|Title:||Investigation on the mechanism of crystallization of soluble protein in the presence of nonionic surfactant|
|Authors:||Jia, Y. |
|Citation:||Jia, Y., Narayanan, J., Liu, X.-Y., Liu, Y. (2005-12). Investigation on the mechanism of crystallization of soluble protein in the presence of nonionic surfactant. Biophysical Journal 89 (6) : 4245-4251. ScholarBank@NUS Repository. https://doi.org/10.1529/biophysj.105.066449|
|Abstract:||The mechanism of crystallization of soluble, globular protein (lysozyme) in the presence of nonionic surfactant C8E4 (tetraoxyethylene glycol monooctyl ether) was examined using both static and dynamic light scattering. The interprotein interaction was found to be attractive in solution conditions that yielded crystals and repulsive in the noncrystallizing solution conditions. The validity of the second virial coefficient as a criterion for predicting protein crystallization could be established even in the presence of nonionic surfactants. Our experiments indicate that the origin of the change in interactions can be attributed to the adsorption of nonionic surfactant monomers on soluble proteins, which is generally assumed to be the case with only membrane proteins. This adsorption screens the hydrophobic attractive force and enhances the hydration and electrostatic repulsive forces between protein molecules. Thus at low surfactant concentration, the effective protein-protein interaction remains repulsive. Large surfactant concentrations promote protein crystallization, possibly due to the attractive depletion force caused by the intervening free surfactant micelles. © 2005 by the Biophysical Society.|
|Source Title:||Biophysical Journal|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Sep 25, 2018
WEB OF SCIENCETM
checked on Sep 18, 2018
checked on Feb 25, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.