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In Silico Study and Validation of Phosphotransacetylase (PTA) as a Putative Drug Target for Staphylococcus aureus by Homology-Based Modelling and Virtual Screening

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Abstract

Staphylococcus aureus, a Gram-positive bacterium, can cause a range of illnesses from minor skin infections to life-threatening diseases, such as bacteraemia, endocarditis, meningitis, osteomyelitis, pneumonia, toxic shock syndrome and sepsis. Due to the emergence of antibiotic resistance strains, there is a need to develop of new class of antibiotics or drug for this pathogen. The phosphotransacetylase enzyme plays an important role in the acetate metabolism and found to be essential for the survival of the S. aureus. This enzyme was evaluated as a putative drug target for S. aureus by in silico analysis. The 3D structure of the phosphotransacetylase from S. aureus was modelled, using the 1TD9 chain ‘A’ from Bacillus subtilis as a template at the resolution of 2.75 Å. The generated model has been validated by PROCHECK, WHAT IF and SuperPose. The docking was performed by the Molegro virtual docker using the ZINC database generated ligand library. The ligand library was generated within the limitation of the Lipinski rule of five. Based on the dock-score, five molecules have been subjected to ADME/TOX analysis and subjected for pharmacophore model generation. The zinc IDs of the potential inhibitors are ZINC08442078, ZINC8442200, ZINC 8442087 and ZINC 8442184 and found to be pharmacologically active antagonist of phosphotransacetylase. The molecules were evaluated as no-carcinogenic and persistent molecule by START programme.

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Acknowledgments

This study was supported by a grant of the Korea Healthcare Technology R&D Project, Ministry of Health & Welfare, Republic of Korea (grant no. A103017). The work was also supported in part by Inha University.

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  1. National Research Laboratory of Bioactive Materials, Department of Biological Engineering, Inha University, Incheon, 42-751, Korea

    V. K. Morya, Varun Dewaker & Eun-Ki Kim

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  1. V. K. Morya
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Correspondence to V. K. Morya.

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Morya, V.K., Dewaker, V. & Kim, EK. In Silico Study and Validation of Phosphotransacetylase (PTA) as a Putative Drug Target for Staphylococcus aureus by Homology-Based Modelling and Virtual Screening. Appl Biochem Biotechnol 168, 1792–1805 (2012). https://doi.org/10.1007/s12010-012-9897-z

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