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Publication Detail
Evaluation of predictions in the CASP10 model refinement category.
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Nugent T, Cozzetto D, Jones DT
  • Publication date:
  • Pagination:
    98, 111
  • Journal:
  • Volume:
    82 Suppl 2
  • Status:
  • Country:
    United States
  • Language:
  • Keywords:
    CASP, model quality evaluation, protein model refinement, protein structure prediction, template-based modeling, Algorithms, Computational Biology, Models, Molecular, Models, Statistical, Protein Conformation, Proteins, Sequence Alignment
Here we report on the assessment results of the third experiment to evaluate the state of the art in protein model refinement, where participants were invited to improve the accuracy of initial protein models for 27 targets. Using an array of complementary evaluation measures, we find that five groups performed better than the naïve (null) method-a marked improvement over CASP9, although only three were significantly better. The leading groups also demonstrated the ability to consistently improve both backbone and side chain positioning, while other groups reliably enhanced other aspects of protein physicality. The top-ranked group succeeded in improving the backbone conformation in almost 90% of targets, suggesting a strategy that for the first time in CASP refinement is successful in a clear majority of cases. A number of issues remain unsolved: the majority of groups still fail to improve the quality of the starting models; even successful groups are only able to make modest improvements; and no prediction is more similar to the native structure than to the starting model. Successful refinement attempts also often go unrecognized, as suggested by the relatively larger improvements when predictions not submitted as model 1 are also considered.
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