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Related Experiment Videos

High expression of era gene.

S Chen1, D L Court

  • 1Department of Biochemistry, Fourth Military Medical University, Xi'an, Shaanxi, China.

Chinese Journal of Biotechnology
|January 1, 1991
PubMed
Summary

Researchers optimized Era protein production by modifying the era gene with a strong translational signal, achieving over 80% purity in E. coli. This method yields highly pure Era protein with guanine nucleotide-binding activity.

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Area of Science:

  • Molecular Biology
  • Protein Expression
  • Biochemistry

Background:

  • The Era protein is crucial for cellular processes.
  • Efficient production of Era protein is essential for research and potential applications.
  • Previous methods for Era protein expression were limited.

Purpose of the Study:

  • To develop a high-yield expression system for Era protein in E. coli.
  • To engineer the era gene for enhanced translational efficiency.
  • To obtain electrophoretically pure Era protein with functional activity.

Main Methods:

  • Selected the lambda Ea8.5 gene for its high expression potential in E. coli.
  • Synthetically modified the 5'-end of the era gene to include a strong translational initiation signal.
  • Utilized plasmid pCE31 with the PL promoter for controlled gene expression.
  • Employed a simple cell lysis and washing procedure for protein purification.

Main Results:

  • Engineered era gene achieved very high levels of Era protein expression.
  • Era protein constituted over 80% of total cellular protein upon induction.
  • Obtained electrophoretically pure Era protein.
  • The purified Era protein exhibited specific guanine nucleotide-binding activity.

Conclusions:

  • The engineered era gene provides a robust system for high-level Era protein production.
  • The developed purification strategy is efficient for obtaining pure, functional Era protein.
  • This method facilitates further studies on Era protein's function and interactions.

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