A combinatorial method to enable detailed investigation of protein-protein interactions
2011
Background: Successful structural investigations of protein-protein interactions can be facilitated by studying only the core interacting regions of the constituent proteins. However, attempting the discovery of stable core complexes using informed trial-and-error approaches can prove time and resource intensive. Methods: We describe a valuable extension of combinatorial domain hunting (CDH), a technology for the timely elucidation of soluble protein truncations. The new method, CDH2, enables empirical discovery of stable protein-protein core complexes. CDH2 is demonstrated ab initio using a previously well-characterized Hsp90/Cdc37 complex. Results: Without using a priori information, we demonstrate the isolation of stable protein-protein complexes, suitable for further analyses. Discussion: This resource-efficient process can provide protein complexes for screening of compounds designed to modulate protein-protein interactions, thus facilitating novel drug discovery.
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