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In silico identification of potential drug targets in swine pathogen Haemophilus parasuis
Authors:Zhuofei Xu  Lifang Ma  Huanchun Chen  Rui Zhou
Institution:1. State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
Abstract:Gram-negative bacterium Haemophilus parasuis has recently become one of the most important etiological agents causing serious systemic disease (Gl?sser??s disease) in pigs. Antibiotic therapy has played a crucial role in the treatment of this disease. Antibiotic resistance observed from the clinical isolates of this pathogen urges us to discover novel drug targets for antimicrobial agents. In this study, we used a combined strategy including exploration of the gene essentiality and comparison of metabolic pathways to infer drug targets of H. parasuis. We identified 931 gene products essential for bacterial growth according to the DEG database. One hundred and ninety-nine enzyme-coding genes were found in the genome of H. parasuis but were absent in that of the swine host. Lastly, we determined 117 enzymes exhibiting essentiality and specificity to H. parasuis as a candidate set of drug targets. Comparison of metabolic pathways between the pathogen and host showed that 25 targeting enzymes belonged to nine unique pathways of the pathogen. The profile of promising targets identified in our study will provide a useful basis for developing more effective antibiotics against the severe swine disease caused by H. parasuis.
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