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Drug Development Expertise Empowering Research Services for Biologics

Protein Engineering Services

Optimizing Antibody Functionality and Developability​ Through Cutting-Edge Protein Design & Engineering Services

WuXi Biologics CRO Services offers cutting-edge protein design & engineering services designed to improve developability and functionality. Using cutting-edge in silico analysis and structural biology techniques, such as X-ray crystallography, cryo-EM, and protein modeling, we aim to enhance affinity, specificity, expression, and stability while minimizing product-related variants (e.g., aggregates and fragments), off-target interactions, and immunogenicity risks.

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Core Strength

Protein Engineering Service Highlights

Early De-Risking for Diverse Modalities

Identify risks and liabilities early across proteins, mAbs, bsAbs, and complex formats

Rational Protein Engineering & Optimization

Combine structural analysis, in silico modeling, and HTP screening to guide lead optimization

Extensive Expertise in Bispecific Antibodies

Enable fit-for-purpose format design and pairing screening across diverse bispecific architectures

Assay-Driven Downstream Readiness

Improve developability and functionality profiles with MOA-based assessment, supporting smooth CMC transitions


  • Early De-Risking for Diverse Modalities Identify risks and liabilities early across proteins, mAbs, bsAbs, and complex formats
  • Rational Protein Engineering & Optimization Combine structural analysis, in silico modeling, and HTP screening to guide lead optimization
  • Extensive Expertise in Bispecific Antibodies Enable fit-for-purpose format design and pairing screening across diverse bispecific architectures
  • Assay-Driven Downstream Readiness Improve developability and functionality profiles with MOA-based assessment, supporting smooth CMC transitions

Service Details

Protein Engineering Services Details

Service Item Description Turnaround
mAb/Protein Design & Engineering Antibody and protein production from high-throughput to gram-scale 3–4 weeks
Early-stage developability assessment for stability, solubility, and specificity under physiologically relevant conditions 1–2 weeks
Sequence- and structure-guided analysis to support protein engineering and lead optimization for improved functionality and developability 1 week
SPR binding assays 1–2 weeks
Functional assessment through binding & competition assays, PBMC-based assays, and in vivo pharmacology Please inquire
Lead optimization guided by early developability and functional assessment, including affinity maturation, humanization, Fc engineering, and antibody & protein engineering Please inquire
Bispecific Antibody Design & Engineering Biology-driven bispecific format design based on geometry, valency, target type, and developability 1 week
Pairing screening supported by Quick ‘n’ Clean or TFC Quick ‘n’ Clean platform 3–4 weeks
Gram-scale, LC-MS-guided bispecific antibody production by Premium BsAb platform 4–5 weeks
Early-stage developability assessment for stability, solubility, and specificity under physiologically relevant conditions 1–2 weeks
Sequence- and structure-guided analysis to support bsAb lead optimization for improved functionality and developability 1 week
SPR binding assays 1–2 weeks
Functional assessment through binding & competition assays, PBMC-based assays, and in vivo pharmacology Please inquire
Lead optimization guided by early developability and functional assessment to fine-tune affinities and formats, including valency, geometry, and linker design Please inquire

Case Studies

Case Studies: mAb and BsAb Design & Engineering for Improved Developability Profiles

Case Study 1: Structure-Guided Antibody Engineering Reduces Non-Specific Binding in VHH-Fc Molecules

This case study highlights how structure analysis was used to reduce non-specific binding in a VHH-Fc molecule. Protein modeling identified positively charged surface patches that informed targeted engineering. Engineered variants were then ranked by insulin ELISA, enabling selection of optimized leads with lower non-specific binding risk, including combinatorial mutations at residues like R30, R52, R53, and T56. The optimized leads also showed a 3- to 4-fold PK improvement (data not shown).

Figure showing a VHH-Fc developability optimization with structural modeling highlighting positively charged surface patches, and insulin ELISA ranking of engineered variants designed to reduce non-specific binding.

Case Study 2: Eliminating Precipitation Through Structure-Guided Bispecific Antibody Engineering & Developability Assessment
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This case study shows how early developability assessment helped identify key risks in a bispecific antibody. Initial testing revealed aggregation and precipitation issues. After structure-guided optimization strategies, the engineered antibody showed higher thermal stability while maintaining binding and biological activity.

Structural analysis and engineering improve bispecific antibody thermal stability and maintain binding and function after optimization.

Why WuXi Biologics

Why Work with WuXi Biologics for Protein Design & Engineering

  • Support Diverse Modalities: Advance protein, monoclonal antibody, and bispecific antibody projects with fit-for-purpose engineering strategies
  • Rational, Data-Driven Design: Combine in silico screening, protein modeling, and protein analysis services to guide optimization
  • Early Developability Focus: Identify and address stability, PK, aggregation, and immunogenicity risks earlier
  • Expert Support Backed by Drug Development Expertise: Align protein engineering strategies with target biology, MOA, and downstream development goals

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Move from Protein Design & Engineering to Better Discovery Decisions

Advance your mAb, bsAb, and protein programs with WuXi Biologics’ protein design and engineering services. From modality-driven design and engineering to lead optimization via early developability assessment and in vitro & in vivo evaluation, we help generate data-driven insights that build better molecules and facilitate smoother progression from research toward development.

Talk to Our Protein Engineering Experts

 

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