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Updated: Jun 24, 2026

An Ectopic Chemokine Expression Model for Testing Macrophage Recruitment In Vivo
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Optimized procedures for producing biologically active chemokines.

Quinn Lu1, Matthew C Burns, Patrick J McDevitt

  • 1GlaxoSmithKline, Biological Reagents & Assay Development, Mail Code: UE0548, 709 Swedeland Road, King of Prussia, PA 19406, USA. Quinn.2.Lu@gsk.com

Protein Expression and Purification
|March 20, 2009
PubMed
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This study presents two novel methods for producing biologically active chemokines using recombinant DNA technology in Escherichia coli. These strategies yield authentic N-terminal amino acid residues, crucial for chemokine function.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Protein Chemistry

Background:

  • Chemokines are vital signaling proteins in the immune system.
  • Producing biologically active chemokines with authentic N-termini is challenging.
  • Recombinant protein expression in Escherichia coli often results in inclusion bodies or misfolded proteins.

Purpose of the Study:

  • To develop and validate two distinct strategies for producing biologically active chemokines with native N-terminal amino acid sequences.
  • To optimize recombinant protein expression and purification techniques for chemokines.
  • To achieve high yields of functional chemokines for research and therapeutic applications.

Main Methods:

  • Strategy 1: Expression of N-terminal 6xHis-SUMO tagged chemokine in E. coli inclusion bodies, followed by solubilization, purification under denaturing conditions, tag removal, and redox refolding.

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  • Strategy 2: Expression of N-terminal 6xHis-Trx-SUMO tagged chemokine in engineered E. coli for cytoplasmic disulfide bond formation, followed by Ni-NTA purification, tag removal, refolding, and reverse-phase chromatography.
  • Utilized Ni-NTA-agarose chromatography for initial purification and reverse-phase chromatography for final polishing.

    • Main Results:

    • Successfully produced over 15 distinct biologically active chemokines using the described methods.
    • Achieved yields of up to 15 mg/L for the target chemokines.
    • Demonstrated the authenticity of N-terminal amino acid residues in the produced chemokines.

    Conclusions:

    • Two robust and effective strategies for producing biologically active chemokines with authentic N-termini have been established.
    • These methods overcome common challenges in recombinant chemokine production, including proper folding and disulfide bond formation.
    • The developed protocols offer a scalable and efficient approach for generating functional chemokines for scientific investigation.