title: De novo prediction of RNA-protein interactions from sequence information.
abstract: Protein-RNA interactions are fundamentally important in understanding cellular processes. In particular, non-coding RNA-protein interactions play an important role to facilitate biological functions in signalling, transcriptional regulation, and even the progression of complex diseases. However, experimental determination of protein-RNA interactions remains time-consuming and labour-intensive. Here, we develop a novel extended naïve-Bayes-classifier for de novo prediction of protein-RNA interactions, only using protein and RNA sequence information. Specifically, we first collect a set of known protein-RNA interactions as gold-standard positives and extract sequence-based features to represent each protein-RNA pair. To fill the gap between high dimensional features and scarcity of gold-standard positives, we select effective features by cutting a likelihood ratio score, which not only reduces the computational complexity but also allows transparent feature integration during prediction. An extended naïve Bayes classifier is then constructed using these effective features to train a protein-RNA interaction prediction model. Numerical experiments show that our method can achieve the prediction accuracy of 0.77 even though only a small number of protein-RNA interaction data are available. In particular, we demonstrate that the extended naïve-Bayes-classifier is superior to the naïve-Bayes-classifier by fully considering the dependences among features. Importantly, we conduct ncRNA pull-down experiments to validate the predicted novel protein-RNA interactions and identify the interacting proteins of sbRNA CeN72 in C. elegans, which further demonstrates the effectiveness of our method.
authors.affiliation: School of Science, Dalian Jiaotong University, Dalian 116028, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Chen
authors.forename: Zhi-Ping
authors.initials: ZP
authors.lastname: Liu
authors.forename: Qiang
authors.initials: Q
authors.lastname: Huang
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.forename: Derong
authors.initials: D
authors.lastname: Xu
authors.forename: Xiang-Sun
authors.initials: XS
authors.lastname: Zhang
authors.forename: Runsheng
authors.initials: R
authors.lastname: Chen
authors.forename: Luonan
authors.initials: L
authors.lastname: Chen
mesh_terms: D000818:Animals; D001499:Bayes Theorem; D017173:Caenorhabditis elegans / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D029742:Caenorhabditis elegans Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D019295:Computational Biology / Q000379:methods*; D030562:Databases, Protein; D008954:Models, Biological; D011485:Protein Binding; D012313:RNA / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D016601:RNA-Binding Proteins / Q000737:chemistry / Q000378:metabolism*; D012372:ROC Curve; D015203:Reproducibility of Results; D020539:Sequence Analysis, Protein / Q000379:methods*
chemical_list: D029742:Caenorhabditis elegans Proteins; D016601:RNA-Binding Proteins; D012313:RNA