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Biotechnol Res Int. 2014;2014:293434. doi: 10.1155/2014/293434. Epub 2014 Apr 23.

Statistical Optimization of Media Components for Production of Fibrinolytic Alkaline Metalloproteases from Xenorhabdus indica KB-3.

Biotechnology research international

Kumar Pranaw, Surender Singh, Debjani Dutta, Surabhi Chaudhuri, Sudershan Ganguly, Lata Nain

Affiliations

  1. Division of Microbiology, Indian Agricultural Research Institute, New Delhi 110012, India ; Department of Biotechnology, National Institute of Technology, Durgapur 713209, India.
  2. Division of Microbiology, Indian Agricultural Research Institute, New Delhi 110012, India.
  3. Department of Biotechnology, National Institute of Technology, Durgapur 713209, India.
  4. Division of Nematology, Indian Agricultural Research Institute, New Delhi 110012, India.

PMID: 24864214 PMCID: PMC4017731 DOI: 10.1155/2014/293434

Abstract

Xenorhabdus indica KB-3, a well-known protease producer, was isolated from its entomopathogenic nematode symbiont Steinernema thermophilum. Since medium constituents are critical to the protease production, the chemical components of the selected medium (soya casein digest broth) were optimized by rotatable central composite design (RCCD) using response surface methodology (RSM). The effects of all five chemical components (considered as independent variables), namely tryptone, soya peptone, dextrose, NaCl, and dipotassium phosphate, on protease production (dependent variable) were studied, and it was found that tryptone and dextrose had maximum influence on protease production. The protease production was increased significantly by 66.31% under optimal medium conditions (tryptone-5.71, soya peptone-4.9, dextrose-1.45, NaCl-6.08, and dipotassium phosphate-0.47 in g/L). To best of knowledge, there are no reports on optimization of medium component for protease production by X. indica KB-3 using RSM and their application in fibrinolysis. This study will be useful for industrial processes for production of protease enzyme from X. indica KB-3 for its application in the field of agriculture and medicine.

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