Predicting the interactome of Xanthomonas oryzae pathovar oryzae for target selection and DB service

Jeong Gu Kim, Daeui Park, Byoung Chul Kim, Seong Woong Cho, Yeong Tae Kim, Young Jin Park, Hee Jung Cho, Hyunseok Park, Ki Bong Kim, Kyong Oh Yoon, Soo Jun Park, Byoung Moo Lee, Jong Bhak

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Background: Protein-protein interactions (PPIs) play key roles in various cellular functions. In addition, some critical inter-species interactions such as host-pathogen interactions and pathogenicity occur through PPIs. Phytopathogenic bacteria infect hosts through attachment to host tissue, enzyme secretion, exopolysaccharides production, toxins release, iron acquisition, and effector proteins secretion. Many such mechanisms involve some kind of protein-protein interaction in hosts. Our first aim was to predict the whole protein interaction pairs (interactome) of Xanthomonas oryzae pathovar oryzae (Xoo) that is an important pathogenic bacterium that causes bacterial blight (BB) in rice. We developed a detection protocol to find possibly interacting proteins in its host using whole genome PPI prediction algorithms. The second aim was to build a DB server and a bioinformatic procedure for finding target proteins in Xoo for developing pesticides that block host-pathogen protein interactions within critical biochemical pathways. Description: A PPI network in Xoo proteome was predicted by bioinformatics algorithms: PSIMAP, PEIMAP, and iPfam. We present the resultant species specific interaction network and host-pathogen interaction, XooNET. It is a comprehensive predicted initial PPI data for Xoo. XooNET can be used by experimentalists to pick up protein targets for blocking pathological interactions. XooNET uses most of the major types of PPI algorithms. They are: 1) Protein Structural Interactome MAP (PSIMAP), a method using structural domain of SCOP, 2) Protein Experimental Interactome MAP (PEIMAP), a common method using public resources of experimental protein interaction information such as HPRD, BIND, DIP, MINT, IntAct, and BioGrid, and 3) Domain-domain interactions, a method using Pfam domains such as iPfam. Additionally, XooNET provides information on network properties of the Xoo interactome. Conclusion: XooNET is an open and free public database server for protein interaction information for Xoo. It contains 4,538 proteins and 26,932 possible interactions consisting of 18,503 (PSIMAP), 3,118 (PEIMAP), and 8,938 (iPfam) pairs. In addition, XooNET provides 3,407 possible interaction pairs between two sets of proteins; 141 Xoo proteins that are predicted as membrane proteins and rice proteomes. The resultant interacting partners of a query protein can be easily retrieved by users as well as the interaction networks in graphical web interfaces. XooNET is freely available from XooNET/.

Original languageEnglish
Article number41
JournalBMC Bioinformatics
StatePublished - 24 Jan 2008

Bibliographical note

Funding Information:
We thank our colleagues at KOBIC, especially, Woo-yeon Kim and Sung-Hun Lee. This project was supported by a grant from the KRIBB Research Initiative Program of Korea and R01-2004-000-10172-0 grant of KOSEF, by the grant from the NIAB 05-4-12-4-2 and by NIAB 07-4-21-22-1 (BioGreen21 20070501034003 from RDA).


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