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Related Experiment Videos

Efficient purification protocol for bioengineering allophycocyanin trimer with N-terminus Histag.

Wenjun Li1, Yang Pu2, Na Gao3

  • 1Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China.

Saudi Journal of Biological Sciences
|April 8, 2017
PubMed
Summary

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This study optimized a protocol for purifying bioengineered allophycocyanin trimers from cyanobacteria using immobilized metal-ion affinity chromatography. The enhanced method ensures high efficiency and trimer stability for large-scale production.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Protein Purification

Background:

  • Allophycocyanin is crucial for efficient photon energy transfer in cyanobacteria.
  • Recombinant expression of His-tagged allophycocyanin trimers from Synechocystis sp. PCC 6803 in E. coli has been achieved.
  • Standard purification protocols require optimization for large-scale, high-efficiency production.

Purpose of the Study:

  • To optimize the purification protocol for recombinant allophycocyanin trimers.
  • To achieve high efficiency, low dissociation, and suitability for large-scale purification.
  • To determine optimal conditions for immobilized metal-ion affinity chromatography.

Main Methods:

  • Utilized a 3^3 full factorial response surface methodology.
Keywords:
Bioengineering allophycocyanin trimerEfficient purificationHistagOptimization

Related Experiment Videos

  • Optimized factors included potassium phosphate pH (X1), NaCl concentration (X2), and imidazole concentration (X3).
  • Purification employed immobilized metal-ion affinity chromatography with Ni2+.

    • Main Results:

    • Achieved a maximum trimerization ratio (Y1) of approximately 1.024 (A650 nm/A620 nm).
    • Confirmed the presence of highly trimeric allophycocyanin using absorbance spectra, fluorescence spectra, and SDS-PAGE.
    • Demonstrated the efficiency of the optimized protocol for purifying His-tagged allophycocyanin trimers.

    Conclusions:

    • The optimized protocol is highly efficient for purifying bioengineered allophycocyanin trimers.
    • The method ensures a high degree of trimerization and stability.
    • This work facilitates large-scale production of functional allophycocyanin for research and applications.