Ortholog-based Protein-protein Interaction Prediction and Its Application to Inter-species Interactions

Overview

Journal BMC Bioinformatics

Publisher Biomed Central

Specialty Biology

Date 2008 Dec 19

PMID 19091010

Citations 53

Authors

Sheng-An Lee

Cheng-hsiung Chan

Chi-Hung Tsai

Jin-Mei Lai

Feng-Sheng Wang

Cheng-Yan Kao

Chi-Ying F Huang

Affiliations

Soon will be listed here.

Abstract

Background: The rapid growth of protein-protein interaction (PPI) data has led to the emergence of PPI network analysis. Despite advances in high-throughput techniques, the interactomes of several model organisms are still far from complete. Therefore, it is desirable to expand these interactomes with ortholog-based and other methods.

Results: Orthologous pairs of 18 eukaryotic species were expanded and merged with experimental PPI datasets. The contributions of interologs from each species were evaluated. The expanded orthologous pairs enable the inference of interologs for various species. For example, more than 32,000 human interactions can be predicted. The same dataset has also been applied to the prediction of host-pathogen interactions. PPIs between P. falciparum calmodulin and several H. sapiens proteins are predicted, and these interactions may contribute to the maintenance of host cell Ca2+ concentration. Using comparisons with Bayesian and structure-based approaches, interactions between putative HSP40 homologs of P. falciparum and the H. sapiens TNF receptor associated factor family are revealed, suggesting a role for these interactions in the interference of the human immune response to P. falciparum.

Conclusion: The PPI datasets are available from POINT http://point.bioinformatics.tw/ and POINeT http://poinet.bioinformatics.tw/. Further development of methods to predict host-pathogen interactions should incorporate multiple approaches in order to improve sensitivity, and should facilitate the identification of targets for drug discovery and design.

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