Co-assembling Peptides for Stable Nanoparticle Formation
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Solution Overview
Problem
Current self-assembling peptides face challenges in forming nanoparticles efficiently due to aggregation and misfolding issues during protein expression, limiting their functional capabilities and biocompatibility in biomedical applications.
Innovation Solution
Engineered charge-complementary peptides that self-assemble only under neutral conditions, incorporating cargo polypeptides to form nanofibers, hydrogels, or nanoparticles when mixed, using crowding agents to promote particle formation and enhance biocompatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If self-assembling peptides are expressed and assembled under physiological conditions, then functional nanoparticles can be formed, but aggregation and misfolding occur during protein expression
Solution Approach 1:
The peptide sequence is divided into distinct functional domains: an N-terminal domain for controlled assembly under physiological conditions, and a C-terminal domain containing the functional cargo. This segmentation allows the assembly-prone region to be separated from the functional region, preventing aggregation while maintaining functionality.
Solution Approach 2:
The peptide is engineered with pre-designed assembly domains that control self-assembly behavior before the functional cargo is incorporated. The N-terminal domain is预先 configured to assemble only under specific physiological conditions, preventing premature aggregation during expression while the C-terminal functional domain remains available for cargo integration.
2Adaptability or versatility
If peptides are engineered to self-assemble under specific conditions, then functional capabilities are enhanced, but manufacturing complexity increases
Solution Approach 1:
The peptide assembly behavior is controlled by changing specific parameters such as pH, temperature, or ionic strength that trigger conformational changes in the N-terminal domain. This allows conditional self-assembly to be achieved through simple environmental parameter adjustments rather than complex manufacturing processes.
Solution Approach 2:
The peptide combines two distinct functional domains within a single sequence: an assembly domain (N-terminal) that responds to environmental parameters and a functional domain (C-terminal) that provides the desired capability. This composite structure integrates multiple functions into one molecule, enhancing versatility while maintaining relatively simple manufacturing.
3Productivity
If crowding agents are used to promote particle formation, then nanoparticle efficiency is improved, but biocompatibility concerns may arise
Solution Approach 1:
The peptide is engineered to perform its own self-assembly function without requiring external crowding agents. The N-terminal domain contains intrinsic properties that drive spontaneous assembly under physiological conditions, eliminating the need for additives that could compromise biocompatibility while maintaining high nanoparticle formation efficiency.
Solution Approach 2:
The requirement for external crowding agents is eliminated by extracting the crowding function and incorporating it directly into the peptide sequence itself. The N-terminal domain provides the self-crowding effect needed for efficient assembly, removing the need for separate biocompatibility-concerning additives.
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 approach enables the formation of stable nanoparticles with integrated functional cargo, improving biocompatibility and functional capabilities, overcoming aggregation issues and expanding applications in biomedical and technological fields.
Implementation Method 1
Self-assembly is the spontaneous organization of molecules into a precise supramolecular architecture without any external guidance
Implementation Method 2
the use of a crowding agent can promote the preferential formation of particles (e.g., nanoparticles) using self-assembling (e.g., co-assembling) peptides
Implementation Method 3
Engineered charge-complementary peptides that self-assemble only under neutral conditions
Data Source
AI summary
Provided herein are co-assembling peptides which may form particles (e.g., nanoparticles or granules) under stimulating conditions. Also provided herein are protein carrying particles (e.g., nanoparticles or granules). Further provided herein, are methods of making each of the co-assembling peptides and particles (e.g., nanoparticles or granules).