Combining Few Neural Networks for Effective Secondary Structure Prediction

  • Authors:
  • Katia S. Guimar~es;Jeane C. B. Melo;George D. C. Cavalcanti

  • Affiliations:
  • -;-;-

  • Venue:
  • BIBE '03 Proceedings of the 3rd IEEE Symposium on BioInformatics and BioEngineering
  • Year:
  • 2003

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Abstract

The prediction of secondary structure is treated with a simple and efficient method. Combining only three neural networks, an average Q3 accuracy prediction by residues of 75.93% is achieved. This value is better than the best result reported on the same test and training database, CB396, using the same validation method. For a second database, RS126, an average Q3 accuracy of 74.13% is attained, which is better than each individual method, being defeated only by CONSENSUS, a rather intrincate engine, which is a combination of several methods.The networks are trained with RPROP, an efficient variation of the back-propagation algorithm. Five combination rules are applied independently afterwards. Each one increases the accuracy of prediction by at least 1%, due to the fact that each network used converges to a different local minimum. The Product rule derives the best results.