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Related Experiment Videos

Constrained peptide libraries as a tool for finding mimotopes

S J McConnell1, M L Kendall, T M Reilly

  • 1DuPont Merck Pharmaceutical Company, Experimental Station, Wilmington, DE 19980-0328.

Gene
|December 30, 1994
PubMed
Summary
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Monoclonal antibody KAA8 binds angiotensin II (AII). Phage display identified AII and a mimotope, demonstrating monovalent display

Area of Science:

  • Immunology
  • Biochemistry
  • Molecular Biology

Background:

  • Monoclonal antibodies (mAbs) are crucial tools in biological research and therapeutics.
  • Angiotensin II (AII) is a key peptide hormone involved in blood pressure regulation.

Purpose of the Study:

  • To characterize the binding epitope of monoclonal antibody KAA8.
  • To explore the utility of phage display for identifying peptide ligands and mimotopes.
  • To assess the capability of monovalent phage display in distinguishing binding affinities.

Main Methods:

  • Biopanning using two distinct phage-displayed peptide libraries (unconstrained and disulfide-constrained).
  • Selection and sequencing of phage clones enriched for binding to KAA8.
  • Analysis of consensus sequences to identify binding peptides and mimotopes.

Related Experiment Videos

  • Demonstration of monovalent phage display for affinity discrimination.

    • Main Results:

    • Both unconstrained and constrained phage libraries showed enrichment for KAA8-binding clones.
    • The unconstrained library yielded a consensus sequence identical to AII.
    • The constrained library produced a consensus sequence representing an AII mimotope.
    • Monovalent phage display successfully differentiated between modest and high-affinity binders.

    Conclusions:

    • Monoclonal antibody KAA8 recognizes angiotensin II.
    • Phage display is effective in identifying both cognate ligands and mimotopes.
    • Monovalent phage display offers a method for quantitative assessment of peptide-mAb interactions.