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Scalable High Throughput Selection From Phage-displayed Synthetic Antibody Libraries
Published on: January 17, 2015
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A versatile platform for combinatorial antibody library cloning and NGS-based quality control with high accuracy
Zhongyao Zhang1,2,3,4, Simon D'Hondt1, Rob Van der Kant2,3,4
1Laboratory for Therapeutic and Diagnostic Antibodies, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Flemish Brabant 3000, Belgium.
Nucleic Acids Research
|October 16, 2025
Summary
This study introduces a new method for creating large antibody libraries, significantly reducing errors and unwanted DNA combinations during synthesis. This advances the development of new antibody-based therapies.
Area of Science:
- Biotechnology
- Molecular Biology
- Immunology
Background:
- Synthetic oligo pools enable cost-effective generation of numerous antibody sequences.
- Challenges include constructing full-length libraries and minimizing PCR-induced chimeras.
Purpose of the Study:
- Develop a versatile combinatorial cloning method for single-domain antibody (VHH) and antigen-binding fragment (Fab) libraries.
- Improve library diversity, length, and reduce chimera formation.
- Establish a PCR-free next-generation sequencing (NGS) platform for quality control.
Main Methods:
- A combinatorial library cloning protocol for VHH and Fab construction.
- Optimization of PCR conditions, specifically lowering template concentration.
- Development of a PCR-free NGS library preparation method.
Main Results:
- Achieved library diversities of tens of thousands with up to four complementarity-determining regions (CDRs).
- Exceeded 90% full-length rate for VHH and Fab libraries.
- Attained >80% construct error-free rate for VHH libraries.
- Demonstrated reduced chimera formation by lowering PCR template concentration.
Conclusions:
- The developed method offers an efficient approach for constructing high-diversity, multi-CDR combinatorial antibody libraries.
- High coverage and accuracy are achieved, aiding therapeutic biologic discovery.
- The reliable NGS platform facilitates quality control and downstream analysis.
