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Selection of Protein Crystal Forms Facilitated by Polymer-Induced Heteronucleation.

Published on Jan 1, 2008in Crystal Growth & Design4.15
· DOI :10.1021/cg0703745
Adam L. Grzesiak11
Estimated H-index: 11
(UM: University of Michigan),
Adam J. Matzger52
Estimated H-index: 52
Abstract
Crystallization of biological macromolecules as high quality single crystals is critical for determining their structure and facilitates the rational design of drugs. Because macromolecules often crystallize in multiple phases that have unique diffraction properties, the selective production of phases is desirable. Furthermore, determining multiple structures allows for a greater understanding of the relationship between crystal packing and conformation. With the aim of exploiting the polymer-induced heteronucleation approach to selectively nucleate multiple macromolecule crystal forms, hen egg white lysozyme (HEWL) was chosen as a model. Selective phase production was achieved under conditions that, in the absence of added heteronuclei, result in crystallization of a single crystal form. Moreover, nucleation rate, which in turn affects the size and quality of HEWL crystals, was controlled by various polymer surfaces. Thus, the polymer-induced heteronucleation approach provides an additional diversity element which can be easily implemented to complement standard crystal growth techniques for the selective production of high quality protein crystals.
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