The Wax Encapsulated Organophosphate Hydrolase (WEO) Displays Prolonged Shelf-Life and Effective in Decontamination of Methyl Parathion and Sarin

Research Article


The recombinant organophosphate hydrolase (OPH) purified from E. coli was used to encapsulate in nonionic wax. The wax encapsulated OPH (WEO) appeared in uniformly sized particles. The WEOs were used to assess OPH stability at different storage conditions. Unlike the free OPH, which has lost most of its activity within 2 weeks, the WEO particles have shown dramatic increase in shelf-life. The lyophilized WEO particles stored at 4 °C have retained complete activity for more than a year. Only 10% of total activity was lost when stored at room temperature. The foams and gelatin pads prepared using WEO particles successfully hydrolyzed OP nerve agent, sarin.


Organophoshpate hydrolase (OPH) Nerve agents Organophosphate insecticides Wax encapsulated OPH (WEO) 



Department of Biotechnology is supported by Andhra Pradesh Netherlands Biotechnology programme and Department of Biotechnology, Govt. of India, is acknowledged.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest to publish this manuscript.


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Copyright information

© The National Academy of Sciences, India 2018

Authors and Affiliations

  • Venkateswar Reddy Muthyala
    • 1
  • Philip H. Gundala
    • 1
  1. 1.Department of BiotechnologySri Krishnadevaraya UniversityAnantapuramuIndia

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