Protein Site-Specific Incorporation

Enhancing protein functions with tailored ncAAs

Proteins are the fundamental workhorses of life, but their functions are inherently limited by the chemical properties of the 20 standard amino acids. This restriction often constrains innovation in protein engineering and drug development.

By integrating non-canonical amino acids (ncAAs), we can overcome these limitations. ncAAs introduce unique side chains—such as photo-reactive groups, bioorthogonal handles, and metal-chelation sites—that expand the chemical toolbox of proteins. This allows for the precise, controlled engineering of proteins with enhanced functionality.

Technology for Precision Engineering

Our core technology is based on genetic code expansion (GCE), a powerful method for incorporating ncAAs at predetermined positions within a protein. This is achieved by creating an engineered, orthogonal tRNA/aminoacyl-tRNA synthetase pair that specifically recognizes the desired ncAA and an amber stop codon. This specialized system operates without interfering with the host cell's natural protein synthesis, ensuring high-fidelity insertion.

This approach provides a significant advantage over random modification methods. It guarantees a homogeneous protein population with predictable functionality, which is critical for reproducibility, stability, and meeting regulatory standards in both research and therapeutic applications.

Expanded Applications

Our service unlocks new possibilities across various fields:

Protein Research: Capture dynamic protein interactions, mimic post-translational modifications, and study protein folding and function with unprecedented detail.
Biomedicine: Design next-generation therapeutics like site-specific antibody-drug conjugates (ADCs) or long-acting protein drugs with improved stability and efficacy.
Enzyme Engineering: Enhance enzyme stability or catalytic activity by introducing fluorinated or metal-chelating ncAAs.
Protein Probes: Create high-sensitivity protein labels for quantitative detection and advanced structural analysis.

Seamless Service Workflow

We offer an end-to-end solution, taking you from initial concept to a validated final product.

Project Design: We collaborate with you to define the target protein, the precise incorporation site(s), and the desired ncAA functionality.
Expression System Construction: Our team develops optimized expression systems with our proprietary orthogonal tRNA/synthetase pairs.
Protein Production: We handle the efficient expression and high-purity isolation of your modified protein.
Quality Control & Validation: Every protein undergoes rigorous Mass Spectrometry (MS) and HPLC analysis to confirm correct ncAA incorporation and purity. We can also perform functional assays to validate the new properties.

Why Choose Alfa Chemistry?

Precision & Specificity: We ensure highly specific ncAA incorporation at the desired site.
Optimized Efficiency: Our systems are engineered for high ncAA insertion efficiency and stable protein expression.
Guaranteed Quality: With MS and HPLC verification, we guarantee a protein purity of >95%.
Comprehensive Service: Our one-stop solution covers everything from gene design to functional validation, saving you time and effort.