High efficiency recovery and epitope-specific sorting of an scFv yeast display library

J Immunol Methods. 2004 Mar;286(1-2):141-53. doi: 10.1016/j.jim.2004.01.005.

Abstract

In order to more productively utilize the rich source of antigen-specific reagents present in the previously described non-immune single chain fragment variable (scFv) yeast display library, one must be able to efficiently isolate and characterize clones within the library. To this end, we have developed and validated a magnetic bead sorting technique utilizing the Miltenyi Macs system to recover greater than 90% of the antigen-specific clones present in the library. In combination with flow cytometry, we rapidly reduced diversity and enriched for antigen-specific clones in three rounds of selection. Furthermore, we demonstrate the use of pre-existing monoclonal antibodies (mAbs) for antigen labeling and subsequent flow cytometric sorting and characterization of epitope-specific scFv. Combining these two improvements in library screening allowed isolation and characterization of three epitope-specific scFv, including a previously uncharacterized epitope to a 6-kDa protein, epidermal growth factor.

Publication types

  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Antibodies, Monoclonal / immunology
  • Epidermal Growth Factor / immunology
  • Epitopes / immunology*
  • Flow Cytometry / methods*
  • Immunoglobulin Fragments / immunology
  • Immunoglobulin Fragments / isolation & purification*
  • Immunoglobulin Variable Region / immunology
  • Immunoglobulin Variable Region / isolation & purification*
  • Immunomagnetic Separation / methods*
  • Peptide Library
  • Yeasts / immunology*

Substances

  • Antibodies, Monoclonal
  • Epitopes
  • Immunoglobulin Fragments
  • Immunoglobulin Variable Region
  • Peptide Library
  • Epidermal Growth Factor