Consensus scoring for enriching near-native structures from protein-protein docking decoys

Shide Liang, Samy O. Meroueh, Guangce Wang, Chao Qiu, Yaoqi Zhou

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

The identification of near native protein-protein complexes among a set of decoys remains highly challenging. A strategy for improving the success rate of near native detection is to enrich near native docking decoys in a small number of top ranked decoys. Recently, we found that a combination of three scoring functions (energy, conservation, and interface propensity) can predict the location of binding interface regions with reasonable accuracy. Here, these three scoring functions are modified and combined into a consensus scoring function called ENDES for enriching near native docking decoys. We found that all individual scores result in enrichment for the majority of 28 targets in ZDOCK2.3 decoy set and the 22 targets in Benchmark 2.0. Among the three scores, the interface propensity score yields the highest enrichment in both sets of protein complexes. When these scores are combined into the ENDES consensus score, a significant increase in enrichment of near-native structures is found. For example, when 2000 dock decoys are reduced to 200 decoys by ENDES, the fraction of near-native structures in docking decoys increases by a factor of about six in average. ENDES was implemented into a computer program that is available for download at http://sparks. informatics.iupui.edu.

Original languageEnglish (US)
Pages (from-to)397-403
Number of pages7
JournalProteins: Structure, Function and Bioinformatics
Volume75
Issue number2
DOIs
StatePublished - May 1 2009

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Keywords

  • Conservation score
  • Energy score
  • Interface propensity
  • Near native decoy selection
  • Protein docking

ASJC Scopus subject areas

  • Biochemistry
  • Structural Biology
  • Molecular Biology
  • Medicine(all)

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