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Antibody Structure01:10

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Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
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Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library
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A multivalent antibody assembled from different building blocks using tag/catcher systems: a case study.

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Summary
This summary is machine-generated.

Multispecific antibodies offer promising cancer therapies and research tools. New SpyTag/SnoopTag technologies enable modular assembly of large, functional multivalent antibodies from antibody fragments.

Keywords:
SnoopTagSpyTagantibodymultispecificprotein engineering

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Area of Science:

  • Biotechnology
  • Immunology
  • Protein Engineering

Background:

  • Multispecific antibodies are increasingly important for cancer therapy and basic research.
  • Designing effective multispecific antibody formats is complex and time-consuming.
  • Existing methods for generating multispecific antibodies lack predictability in geometry.

Purpose of the Study:

  • To develop a modular approach for constructing diverse multispecific antibodies.
  • To utilize SpyTag and SnoopTag technologies for assembling antibody fragments.
  • To create large, multivalent antibody constructs with retained antigen-binding functionality.

Main Methods:

  • Antibody fragments (Fab, Fc-containing) were engineered with SpyTag/SnoopTag or SpyCatcher/SnoopCatcher domains.
  • Fragments were produced separately and assembled in vitro into multivalent antibody structures.
  • Binding experiments were performed to assess antigen accessibility in assembled antibodies.

Main Results:

  • Successfully designed and produced large multivalent antibodies comprising up to seven distinct building blocks.
  • Demonstrated that all antigen-binding sites within these complex structures remained accessible.
  • Validated the SpyTag/SnoopTag systems for modular antibody assembly.

Conclusions:

  • SpyTag and SnoopTag technologies provide a versatile platform for constructing complex multivalent antibodies.
  • This modular assembly approach simplifies the generation of diverse antibody formats.
  • The developed method facilitates the creation of novel therapeutic and research tools in antibody engineering.