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Amino Acid Features for Prediction of Protein-Protein Interface Residues with Support Vector Machines

  • Minh N. Nguyen
  • Jagath C. Rajapakse
  • Kai-Bo Duan
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4447)

Abstract

Knowledge of protein-protein interaction sites is vital to determine proteins’ function and involvement in different pathways. Support Vector Machines (SVM) have been proposed over the recent years to predict protein-protein interface residues, primarily based on single amino acid sequence inputs. We investigate the features of amino acids that can be best used with SVM for predicting residues at protein-protein interfaces. The optimal feature set was derived from investigation into features such as amino acid composition, hydrophobic characters of amino acids, secondary structure propensity of amino acids, accessible surface areas, and evolutionary information generated by PSI-BLAST profiles. Using a backward elimination procedure, amino acid composition, accessible surface areas, and evolutionary information generated by PSI-BLAST profiles gave the best performance. The present approach achieved overall prediction accuracy of 74.2% for 77 individulal proteins collected from the Protein Data Bank, which is better than the previously reported accuracies.

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Copyright information

© Springer Berlin Heidelberg 2007

Authors and Affiliations

  • Minh N. Nguyen
    • 1
  • Jagath C. Rajapakse
    • 1
    • 2
  • Kai-Bo Duan
    • 1
  1. 1.BioInformatics Research Centre, School of Computer Engineering, Nanyang Technological UniversitySingapore
  2. 2.Singapore-MIT AllianceSingapore

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