Multivalent Protein Complexes via Segmented Polymer Backbones
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for creating multivalent protein complexes are costly, have low yield, and often result in randomly oriented and functionally compromised protein complexes, making large-scale production challenging.
Innovation Solution
A composition comprising a multi-protein complex with Fc-binding domains and Fc-containing proteins, where the Fc-containing proteins bind to the Fc-binding domains, forming a stable and flexible complex that can bind to multiple targets, including T cell surface antigens, facilitating efficient T cell activation and expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If chemical conjugation of ligands to polymers is used, then multivalent binding sites are created, but manufacturing cost increases and yield decreases
Solution Approach 1:
The invention divides the multivalent binding function into separate components: a polymer backbone and multiple independently synthesized ligand-protein conjugates. Each ligand-protein conjugate is made separately with controlled stoichiometry, then randomly distributed onto the polymer. This segmentation enables independent optimization of each component and simplifies manufacturing, resolving the contradiction between achieving multivalency and maintaining high yield.
Solution Approach 2:
The polymer acts as an intermediary carrier that randomly distributes multiple ligand-protein conjugates. This intermediary approach allows the polymer to provide the multivalent framework while the ligand-protein conjugates provide the specific binding functionality. The random distribution mechanism simplifies manufacturing compared to controlled conjugation methods, improving yield while maintaining multivalency.
2Adaptability or versatility
If covalent crosslinking of binding ligands is used, then multivalent complexes are formed, but functional orientation is compromised
Solution Approach 1:
The invention uses a flexible polymer backbone with random distribution of ligand-protein conjugates, allowing the complex to dynamically adjust its structure. The ligands can rotate and reorient themselves to achieve optimal binding orientations, rather than being fixed in rigid positions. This dynamic flexibility resolves the contradiction by maintaining multivalency while preserving functional orientation through random distribution and molecular mobility.
3Manufacturing precision
If controlled ligand conjugation is used, then specific binding sites are created, but manufacturing complexity increases
Solution Approach 1:
The invention uses multiple copies of the same polymer backbone with ligand-protein conjugates randomly distributed throughout. Rather than creating a single precisely controlled conjugation structure, the method produces many identical polymer frameworks with statistically distributed ligands. This copying approach maintains binding site specificity through random distribution while dramatically simplifying manufacturing, as the same standardized components can be produced using conventional techniques.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The complex enables efficient T cell activation and expansion, achieving up to 100,000-fold expansion in vitro or ex vivo, with high cell viability and specificity, and can be used for cancer treatment by targeting cancer cells.
Implementation Method 1
two or more Fc-containing proteins, each comprising an Fc region, wherein each Fc-containing protein binds to the Fc-binding domain in the polypeptide
Data Source
AI summary
This disclosure is related to methods of making and using a multi-protein complex. The complex can create a multivalent binding mechanism for multiple targets in a solution or on a surface. The complex has various applications, and can be used, e.g., for activation and/or expansion of T cells.