期刊
COMPUTATIONAL BIOLOGY AND CHEMISTRY
卷 36, 期 -, 页码 36-41出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compbiolchem.2011.12.003
关键词
Protein-protein interaction; Ensemble methods; Imbalanced data
资金
- National Natural Science Foundation of China [20905054, 20972103]
- Specialized Research Fund for the Doctoral Program of Higher Education [20090181120058]
In proteins, the number of interacting pairs is usually much smaller than the number of non-interacting ones. So the imbalanced data problem will arise in the field of protein-protein interactions (PPIs) prediction. In this article, we introduce two ensemble methods to solve the imbalanced data problem. These ensemble methods combine the based-cluster under-sampling technique and the fusion classifiers. And then we evaluate the ensemble methods using a dataset from Database of Interacting Proteins (DIP) with 10-fold cross validation. All the prediction models achieve area under the receiver operating characteristic curve (AUC) value about 95%. Our results show that the ensemble classifiers are quite effective in predicting PPIs; we also gain some valuable conclusions on the performance of ensemble methods for PPIs in imbalanced data. The prediction software and all dataset employed in the work can be obtained for free at http://cic.scu.edu.cn/bioinformatics/Ensemble_PPIs/index.html. (C) 2011 Elsevier Ltd. All rights reserved.
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