Prediction of heme binding residues from protein sequences with integrative sequence profiles

Springer Science and Business Media LLC - Tập 10 Số S1 - 2012
Yi Xiong1, Juan Liu1, Wen Zhang1, Tao Zeng1
1School of Computer, Wuhan University, Wuhan, China

Tóm tắt

Abstract Background The heme-protein interactions are essential for various biological processes such as electron transfer, catalysis, signal transduction and the control of gene expression. The knowledge of heme binding residues can provide crucial clues to understand these activities and aid in functional annotation, however, insufficient work has been done on the research of heme binding residues from protein sequence information. Methods We propose a sequence-based approach for accurate prediction of heme binding residues by a novel integrative sequence profile coupling position specific scoring matrices with heme specific physicochemical properties. In order to select the informative physicochemical properties, we design an intuitive feature selection scheme by combining a greedy strategy with correlation analysis. Results Our integrative sequence profile approach for prediction of heme binding residues outperforms the conventional methods using amino acid and evolutionary information on the 5-fold cross validation and the independent tests. Conclusions The novel feature of an integrative sequence profile achieves good performance using a reduced set of feature vector elements.

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