ncAA Incorporated Peptide Library Development

Advancing the frontiers of synthetic biology, genetic code expansion (GCE) facilitates the site-specific incorporation of non-canonical amino acids (ncAAs) into proteins and peptides, effectively expanding beyond the limitations of the 20 standard amino acids. Leveraging a proprietary high-throughput GCEngine platform, our company serves as a premier partner in providing end-to-end solutions, ranging from initial pair identification to the complex development of ncAA incorporated peptide libraries. These libraries represent a transformative toolset for pharmaceutical R&D, enabling the discovery of next-generation therapeutics with enhanced stability, potency, and specificity.

Overview of ncAA-Incorporated Peptide Library

An ncAA-incorporated peptide library is a systematically designed collection of peptides wherein one or more specific positions are encoded by ncAAs. These libraries integrate structural motifs that are not found in nature, such as D-amino acids, beta-amino acids, and side chains with unique bioconjugation handles. By utilizing ribosomal synthesis or combined chemical synthesis and enzymatic ligation approaches, thousands to millions of unique variants can be screened to identify high-affinity binders or enzymatic inhibitors that possess superior proteolytic resistance and improved pharmacokinetic profiles.

Application Areas of ncAA-Incorporated Peptide Library

The site-specific incorporation of ncAAs into peptide libraries fundamentally redefines their chemical and functional capabilities. This technology bridges discovery and application, enabling the rapid generation of tailored molecules that address specific challenges across biomedical research and industrial biotechnology, from uncovering new biological mechanisms to developing advanced diagnostics and therapeutics.

Therapeutic Discovery & Development

Enabling the creation of constrained peptides, peptide-drug conjugates (via bioorthogonal handles), and high-affinity binders for challenging targets like protein-protein interfaces.

Diagnostics & Imaging

Provides site-specifically labeled peptides for highly sensitive detection, serving as targeted probes for molecular imaging and robust components for diagnostic assays.

Synthetic Biology & Enzyme Engineering

Supplies novel building blocks to engineer proteins and enzymes with customized properties, such as enhanced stability or new catalytic activities, for industrial and research applications.

Basic Research & Chemical Biology

Allowing precise introduction of spectroscopic probes (e.g., for NMR, EPR) or mimics of post-translational modifications to study protein structure, dynamics, and function.

Our Services

Leveraging our proprietary, integrated GCEngine platform, we provide a comprehensive and collaborative service for ncAA-incorporated peptide library development. Our support encompasses the entire process, from initial design and selection of suitable orthogonal systems to the final delivery of a validated, diverse peptide library tailored to your specific ncAA and screening goals. This end-to-end partnership is designed to accelerate your project by providing access to specialized expertise and an optimized workflow that mitigates the technical hurdles.

Workflow of ncAA Incorporated Peptide Library Development

• Consultation & Design: Collaborative assessment of project objectives to define the specific ncAAs, desired library diversity, incorporation sites, and the structural peptide scaffold (e.g., linear, cyclic, or constrained).
• Orthogonal aaRS/tRNA Pair Selection & Engineering: Identifying and optimizing a high-fidelity orthogonal aaRS/tRNA pair specific to your target ncAA, employing directed evolution and dual positive/negative selection strategies.
• Library Design & Template Construction: Utilizing computational tools to design diverse peptide sequences and constructing DNA templates containing amber (TAG) or other reassigned codons at strategic positions.
• Incorporation Efficiency Validation: Pilot testing of ncAA incorporation across various expression systems (e.g., E. coli, yeast, or cell-free systems) using reporter assays (like GFP fluorescence) to ensure high fidelity and yield.
• Library Synthesis & Expression: Employing high-throughput GCE expression systems to generate the peptide library, ensuring broad coverage of the intended sequence space.
• Quality Control & Characterization: Rigorous validation of library diversity and ncAA incorporation rates via high-resolution mass spectrometry (LC-MS/MS) and Next-Generation Sequencing (NGS) to confirm sequence integrity.

Types of ncAA-Incorporated Peptide Libraries

The strategic incorporation of ncAAs enables the creation of peptide libraries with tailored formats and enhanced properties. These libraries are broadly categorized by their screening platform and their designed biological or chemical functionality, as outlined below.

Why Choose Us?

• End-to-End Solution: From orthogonal pair identification and optimization to final validated peptide hits within an integrated workflow.
• Deep Customization & Flexibility: Tailoring library design, ncAA selection, and screening strategies to meet specific project goals and complex research needs.
• Expertise & Experience: Leveraging specialized knowledge in both GCE technology and peptide library development for scientifically guided project execution.
• Advanced Proprietary Platform: Utilizing a high-throughput, systematic platform for developing efficient orthogonal systems, enhancing incorporation success, and library quality.

Contact Us

By partnering with us for your ncAA-incorporated peptide library development, you gain access to a powerful combination of cutting-edge technology, specialized expertise, and a collaborative approach designed to overcome the challenges of genetic code expansion. Our goal is to empower your research and accelerate the discovery of next-generation peptide-based tools and therapeutics. To discuss how our GCEngine platform and services can advance your specific project, please contact our scientific team to initiate a consultation.

Reference

1. Franco, H Estheban Osorio et al. "Spontaneous, co-translational peptide macrocyclization using p-cyanoacetylene-phenylalanine." Chemical communications (Cambridge, England) 58.47 (2022): 6737-6740.

All our services are exclusively intended for preclinical research purposes. They are not intended for diagnostic, therapeutic, or patient management applications.