Characterization of the Topological Features of Catalytic Sites in Protein Coevolution Networks
Xiu-Lian Xu** , Jin-Xuan Shi
School of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
Abstract ：The knowledge of sequence and structural properties of residues in the catalytic sites of enzymes is important for understanding the physiochemical basis of enzymatic catalysis. We reveal new features of the catalytic sites by analyzing the coevolutionary behavior of amino acid sequences. By performing direct coupling analysis of the sequences of homologous proteins, we construct the coevolution networks at the residue level. Based on the analysis of the topological features of the coevolution networks for a dataset including 20 enzymes, we show that there is significant correlation between the catalytic sites and topological features of protein coevolution networks. Residues at the catalytic center often correspond to the nodes with high values of centralities in the networks as characterized by the degree, betweenness, closeness, and Laplacian centrality. The results of this work provide a possible way to extract key coevolutionary information from the sequences of enzymes, which is useful in the prediction of catalytic sites of enzymes.
收稿日期: 2020-02-06
出版日期: 2020-05-26
:
87.15.-v
(Biomolecules: structure and physical properties)
87.14.E-
(Proteins)
89.75.Fb
(Structures and organization in complex systems)
89.75.-k
(Complex systems)
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2020, Vol. 37 
