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Proteins have evolved to fold into a functional shape, or in cases where a flexible tether is needed, to remain consistently unfolded. In some cases, however, proteins aggregate to form unwanted structures, which can have dangerous consequences. The amyloid-beta precursor protein is a perfect example. In its normal form, it is a membrane-bound protein with folded regions connected by flexible tethers. But if the protein chain is broken, some of the resulting peptides aggregate into long fibrils, termed "amyloids," that can gum up the proper working of cells.Full Article
One of the great successes of PSI Biology has been the ability to apply the powerful PSI pipelines for high-throughput structure determination to topics of interest in the wider structural biology research community. Through a program of community nominated targets, the PSI has helped researchers explore topics from ranging from protein design to translational medicine, determining more than 500 new macromolecular structures of high biological significance in the process. A few examples are given here, and many additional examples have been presented in past installments of the PSI Structural Biology Knowledgebase. Full Article | Archive | PSI Structural Biology Knowledgebase
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