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Related Experiment Video

Updated: Mar 21, 2026

Bacterial Inner-membrane Display for Screening a Library of Antibody Fragments
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Targeting membrane proteins for antibody discovery using phage display.

Martina L Jones1, Mohamed A Alfaleh1,2, Sumukh Kumble1

  • 1Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia Queensland 4072 Australia.

Scientific Reports
|May 19, 2016
PubMed
Summary

This study presents a novel method for isolating antibodies against membrane proteins using transient transfection and stringent washing. This technique overcomes challenges in whole cell panning, enabling successful antibody discovery for human CD83, canine CD117, and bat CD11b.

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Area of Science:

  • Biotechnology
  • Immunology
  • Molecular Biology

Background:

  • Phage display requires correctly folded antigens for successful antibody isolation.
  • Membrane proteins present significant challenges due to difficulties in purification and presentation.
  • Whole cell panning offers native conformation but suffers from low target density and high background.

Purpose of the Study:

  • To develop an improved method for antibody discovery against membrane proteins using phage display.
  • To address limitations of whole cell panning, including low antigen density and non-specific binding.
  • To successfully isolate antibodies against specific human, canine, and bat membrane proteins.

Main Methods:

  • Utilized transient transfection of alternating host cell lines to increase target antigen density.
  • Implemented stringent washing steps to reduce background and non-specific phage binding.
  • Employed a naive single-chain variable fragment (scFv) library for antibody isolation.

Main Results:

  • Successfully isolated antibodies against three distinct membrane-bound proteins: human CD83, canine CD117, and bat CD11b.
  • The developed method effectively mitigated the challenges associated with whole cell panning.
  • Demonstrated the utility of the technique for antibody discovery against difficult-to-target membrane proteins.

Conclusions:

  • The described method provides a robust approach for isolating antibodies against membrane proteins.
  • Transient transfection and stringent washing are effective strategies to enhance whole cell panning.
  • This technique expands the possibilities for antibody discovery in membrane protein research.