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Related Experiment Videos

Single-chain antigen-binding proteins.

R E Bird1, K D Hardman, J W Jacobson

  • 1Genex Corporation, Gaithersburg, MD 20877.

Science (New York, N.Y.)
|October 21, 1988
PubMed
Summary
This summary is machine-generated.

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Novel single-chain antigen-binding proteins, created by linking antibody variable light (VL) and heavy (VH) chains, mimic monoclonal antibody specificity and affinity. These recombinant proteins offer potential advantages for various applications.

Area of Science:

  • Biotechnology
  • Molecular Biology
  • Immunology

Background:

  • Monoclonal antibodies (mAbs) are crucial tools in research and therapeutics.
  • Recombinant protein engineering offers opportunities to create novel antibody-based molecules.
  • Developing alternative binding proteins with enhanced properties is an active area of research.

Purpose of the Study:

  • To design and construct novel single-chain antigen-binding proteins (scFvs).
  • To evaluate the antigen-binding specificity and affinity of these recombinant proteins.
  • To explore the potential advantages of scFvs over traditional monoclonal antibodies.

Main Methods:

  • Engineered recombinant polypeptides by tethering antibody variable light (VL) and variable heavy (VH) chain amino acid sequences.

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  • Utilized a designed peptide linker connecting the VL and VH sequences.
  • Expressed recombinant genes in Escherichia coli and purified the resulting proteins.
  • Assayed protein specificity and affinity for target antigens.

    • Main Results:

    • Successfully designed, constructed, synthesized, and purified three scFv proteins.
    • Demonstrated that scFvs retained the antigen specificities and affinities of their parent mAbs.
    • One scFv was derived from an anti-growth hormone mAb, and two from anti-fluorescein mAbs.

    Conclusions:

    • Single-chain antigen-binding proteins are viable recombinant alternatives to monoclonal antibodies.
    • These scFvs exhibit comparable antigen-binding characteristics to their parent mAbs.
    • scFvs are anticipated to offer significant advantages in diverse applications, warranting further investigation.