Prediction of the structure of protein-protein complexes is an increasingly prominent field of endeavor in the current post-genome era, since new sequences and links between proteins are now regularly being discovered. "Docking" is a predictive method that uses computer algorithms to create three-dimensional models of the interactions formed between two protein molecules when they make contact, or "dock", with one another. The CAPRI Challenge, which requires that all competitors predict interactions for the same unbound molecules, provides a useful basis of comparison of different docking algorithms. The participants are given the structures of individual molecules and are requested to submit their predictions for the resulting complexes by a certain date, after which the experimental structures are made public. An independent group of assessors tests and compares all the predictions.
Predicting the ultimate complex structure of two unbound protein molecules is an exceptionally difficult task, since the proteins change their shapes in response to one another's presence
Contact: Jeffrey J. Sussman
American Committee for the Weizmann Institute of Science