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Updated: May 2, 2026

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A highly efficient cocaine-detoxifying enzyme obtained by computational design.

Fang Zheng1, Liu Xue1, Shurong Hou1

  • 1Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY 40536, USA.

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|March 20, 2014
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Summary

Researchers engineered a highly efficient cocaine-hydrolyzing enzyme, E30-6, using computational design and experimental methods. This enzyme shows therapeutic potential for cocaine detoxification and abuse treatment.

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Area of Science:

  • Biochemistry
  • Enzyme Engineering
  • Computational Biology

Background:

  • Computationally designed enzymes typically exhibit lower efficiency than natural enzymes.
  • Existing enzymes lack sufficient catalytic activity for effective cocaine hydrolysis.

Purpose of the Study:

  • To design a highly efficient cocaine-hydrolyzing enzyme using a computational and experimental approach.
  • To engineer an enzyme with enhanced catalytic activity for cocaine compared to its natural substrate.

Main Methods:

  • A two-step computational design strategy was employed.
  • Experimental validation was performed on the engineered enzyme, E30-6, derived from human butyrylcholinesterase (BChE).
  • Catalytic efficiency for cocaine and acetylcholine (ACh) hydrolysis was measured.

Main Results:

  • The engineered enzyme E30-6 demonstrated significantly higher catalytic efficiency for cocaine hydrolysis compared to acetylcholine hydrolysis.
  • E30-6's cocaine hydrolysis efficiency is comparable to naturally occurring acetylcholinesterase, approaching the diffusion limit.
  • E30-6 successfully protected mice against a lethal dose of cocaine.

Conclusions:

  • The designed enzyme E30-6 exhibits remarkable efficiency in cocaine hydrolysis.
  • E30-6 shows significant therapeutic potential for cocaine detoxification and the treatment of cocaine abuse.