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论文类型：期刊论文

发表时间：2015-10-01

发表刊物：CRYSTAL GROWTH & DESIGN

收录刊物：SCIE、EI、Scopus

卷号：15

期号：10

页面范围：4932-4937

ISSN号：1528-7483

摘要：Zwitterion additives have been used in protein crystallization to prevent the appearance of crystal clusters. Herein, we have developed a novel approach for the immobilization of zwitterion onto molecularly imprinted polymers (MIPs) to yield high-quality single protein crystals. For lysozyme, trypsin, catalase, proteinase K, concanavalin A-type IV, and thaumatin, simply adding the selected zwitterion (3-(methacryloylamino)propyl)-dimethyl(3-sulfopropyl) ammonium hydroxide) into the free solution, the crystallization was improved. When further using the zwitterion-immobilized molecularly imprinted polymers (ziMIPs) developed in the current study, the formation of higher quality crystals was facilitated in a shorter time compared with regular MIPs and traditional crystallization trials. Most notably, concanavalin A-type IV, which has nonunique ordered assembly, gave only the form IV structure with higher resolution in the presence of ziMIPs, justifying the superior function of ziMIPs for the ordered assembly of protein molecules. Thus, the ziMIPs could be widely used in protein crystallization.