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• W2001966531 abstract "Identification of protein complexes is fundamental for understanding the cellular functional organization. With the accumulation of physical protein-protein interaction (PPI) data, computational detection of protein complexes from available PPI networks has drawn a lot of attentions. While most of the existing protein complex detection algorithms focus on analyzing the physical protein-protein interaction network, none of them take into account the “signs” (i.e., activation-inhibition relationships) of physical interactions. As the “signs” of interactions reflect the way proteins communicate, considering the “signs” of interactions can not only increase the accuracy of protein complex identification, but also deepen our understanding of the mechanisms of cell functions. In this study, we proposed a novel Signed Graph regularized Nonnegative Matrix Factorization (SGNMF) model to identify protein complexes from signed PPI networks. In our experiments, we compared the results collected by our model on signed PPI networks with those predicted by the state-of-the-art complex detection techniques on the original unsigned PPI networks. We observed that considering the “signs” of interactions significantly benefits the detection of protein complexes. Furthermore, based on the predicted complexes, we predicted a set of signed complex-complex interactions for each dataset, which provides a novel insight of the higher level organization of the cell. All the experimental results and codes can be downloaded from http://mail.sysu.edu.cn/home/stsddq@mail. sysu.edu.cn/dai/others/SGNMF.zip." @default.
• W2001966531 created "2016-06-24" @default.
• W2001966531 creator A5030129372 @default.
• W2001966531 creator A5080609124 @default.
• W2001966531 creator A5088518917 @default.
• W2001966531 date "2015-11-01" @default.
• W2001966531 modified "2023-10-14" @default.
• W2001966531 title "Detecting Protein Complexes from Signed Protein-Protein Interaction Networks" @default.
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• W2001966531 doi "https://doi.org/10.1109/tcbb.2015.2401014" @default.
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