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Highly accurate prediction of protein self-interactions by incorporating the average block and PSSM information into the general PseAAC. (English) Zbl 1393.92016

Summary: It is a challenging task for fundamental research whether proteins can interact with their partners. Protein self-interaction (SIP) is a special case of PPIs, which plays a key role in the regulation of cellular functions. Due to the limitations of experimental self-interaction identification, it is very important to develop an effective biological tool for predicting SIPs based on protein sequences. In the study, we developed a novel computational method called RVM-AB that combines the relevance vector machine (RVM) model and average blocks (AB) for detecting SIPs from protein sequences. Firstly, average blocks (AB) feature extraction method is employed to represent protein sequences on a position specific scoring matrix (PSSM). Secondly, principal component analysis (PCA) method is used to reduce the dimension of AB vector for reducing the influence of noise. Then, by employing the relevance vector machine (RVM) algorithm, the performance of RVM-AB is assessed and compared with the state-of-the-art support vector machine (SVM) classifier and other exiting methods on yeast and human datasets respectively. Using the fivefold test experiment, RVM-AB model achieved very high accuracies of 93.01% and 97.72% on yeast and human datasets respectively, which are significantly better than the method based on SVM classifier and other previous methods. The experimental results proved that the RVM-AB prediction model is efficient and robust. It can be an automatic decision support tool for detecting SIPs. For facilitating extensive studies for future proteomics research, the RVMAB server is freely available for academic use at http://219.219.62.123:8888/SIP_AB.

MSC:

92C40 Biochemistry, molecular biology
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