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Yu Guoxian, Wang Keyao, Fu Guangyuan, Wang Jun, Zeng An. Protein Function Prediction Based on Multiple Networks Collaborative Matrix Factorization[J]. Journal of Computer Research and Development, 2017, 54(12): 2660-2673. DOI: 10.7544/issn1000-1239.2017.20170644
Citation: Yu Guoxian, Wang Keyao, Fu Guangyuan, Wang Jun, Zeng An. Protein Function Prediction Based on Multiple Networks Collaborative Matrix Factorization[J]. Journal of Computer Research and Development, 2017, 54(12): 2660-2673. DOI: 10.7544/issn1000-1239.2017.20170644

Protein Function Prediction Based on Multiple Networks Collaborative Matrix Factorization

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  • Published Date: November 30, 2017
  • Accurately and automatically predicting biological functions of proteins is one of the fundamental tasks in bioinformatics, and it is also one of the key applications of artificial intelligence in biological data analysis. The wide application of high throughput technologies produces various functional association networks of molecules. Integrating these networks contributes to more comprehensive view for understanding the functional mechanism of proteins and to improve the performance of protein function prediction. However, existing network integration based solutions cannot apply to a large number of functional labels, ignore the correlation between labels, or cannot differentially integrate multiple networks. This paper proposes a protein function prediction approach based on multiple networks collaborative matrix factorization (ProCMF). To explore the latent relationship between proteins and between labels, ProCMF firstly applies nonnegative matrix factorization to factorize the protein-label association matrix into two low-rank matrices. To employ the correlation between labels and to guide the collaborative factorization with proteomic data, it defines two smoothness terms on these two low-rank matrices. To differentially integrate these networks, ProCMF sets different weights to them. In the end, ProCMF combines these goals into a unified objective function and introduces an alternative optimization technique to jointly optimize the low-rank matrices and weights. Experimental results on three model species (yeast, human and mouse) with multiple functional networks show that ProCMF outperforms other related competitive methods. ProCMF can effectively and efficiently handle massive labels and differentially integrate multiple networks.
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