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Sequence-Based Prediction of microRNA-Binding Residues in Proteins Using Cost-Sensitive Laplacian Support Vector Machines

Published: 01 May 2013 Publication History

Abstract

The recognition of microRNA (miRNA)-binding residues in proteins is helpful to understand how miRNAs silence their target genes. It is difficult to use existing computational method to predict miRNA-binding residues in proteins due to the lack of training examples. To address this issue, unlabeled data may be exploited to help construct a computational model. Semisupervised learning deals with methods for exploiting unlabeled data in addition to labeled data automatically to improve learning performance, where no human intervention is assumed. In addition, miRNA-binding proteins almost always contain a much smaller number of binding than nonbinding residues, and cost-sensitive learning has been deemed as a good solution to the class imbalance problem. In this work, a novel model is proposed for recognizing miRNA-binding residues in proteins from sequences using a cost-sensitive extension of Laplacian support vector machines (CS-LapSVM) with a hybrid feature. The hybrid feature consists of evolutionary information of the amino acid sequence (position-specific scoring matrices), the conservation information about three biochemical properties (HKM) and mutual interaction propensities in protein-miRNA complex structures. The CS-LapSVM receives good performance with an F1 score of $(26.23 \pm 2.55\%)$ and an AUC value of $(0.805 \pm 0.020)$ superior to existing approaches for the recognition of RNA-binding residues. A web server called SARS is built and freely available for academic usage.

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  1. Sequence-Based Prediction of microRNA-Binding Residues in Proteins Using Cost-Sensitive Laplacian Support Vector Machines

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      Published In

      cover image IEEE/ACM Transactions on Computational Biology and Bioinformatics
      IEEE/ACM Transactions on Computational Biology and Bioinformatics  Volume 10, Issue 3
      May 2013
      272 pages

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      IEEE Computer Society Press

      Washington, DC, United States

      Publication History

      Published: 01 May 2013
      Published in TCBB Volume 10, Issue 3

      Author Tags

      1. Laplacian support vector machine
      2. cost-sensitive learning
      3. evolutionary information
      4. miRNA-binding residues
      5. mutual interaction propensities

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