Ferritin Binding Proteins for High-Purity Affinity Purification
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Solution Overview
Problem
Current methods for purifying ferritin are inefficient and lack precision, particularly in medical applications where high purity is required.
Innovation Solution
Development of novel binding proteins with specific affinity for ferritin, allowing precise purification via affinity chromatography, with sequences exhibiting at least 90% identity to SEQ ID NO: 2 or SEQ ID NO: 3, and binding affinities below 100 nM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional purification methods are used, then the process is simple, but the purification precision and purity are insufficient
Solution Approach 1:
The patent introduces a novel binding protein as an intermediary molecule that specifically interacts with ferritin. This binding protein serves as a mediator between the purification system and ferritin, enabling high-precision purification through affinity chromatography. The binding protein is designed with specific amino acid sequences (at least 90% identity to SEQ ID NO: 2 or 3) that confer high affinity binding (KD < 100 nM) to ferritin, allowing selective capture and purification.
Solution Approach 2:
The patent employs parameter changes in terms of binding affinity characteristics. By designing binding proteins with specific KD values (less than 100 nM), the patent creates optimal binding conditions for purification. The affinity parameters are carefully controlled to ensure specific interaction with ferritin while maintaining separability from other proteins in the mixture.
2Reliability
If high affinity binding proteins are used, then purification purity is improved, but protein sequence specificity requirements increase
Solution Approach 1:
The patent establishes a clear parameter threshold for sequence identity (at least 90% identity to SEQ ID NO: 2 or 3) and binding affinity (KD < 100 nM). This parameterization allows for reliable prediction of binding characteristics without requiring exhaustive sequence analysis. The parameters are set to ensure both high reliability of binding and practical feasibility of protein design and selection.
3Manufacturing precision
If affinity chromatography with novel binding proteins is used, then ferritin purification purity is improved, but the complexity of the purification system increases
Solution Approach 1:
The binding protein acts as a modular intermediary component that can be integrated into existing affinity chromatography systems. Rather than requiring complete system redesign, the binding protein serves as a plug-and-play element that enhances purification capability while maintaining compatibility with standard chromatography equipment and procedures.
Solution Approach 2:
The binding protein design considers multi-functionality, where the same binding protein can be used for various applications including purification, detection, and potential therapeutic purposes. This universal design reduces the need for multiple specialized components and simplifies the overall system requirements.
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
Enables high-purity ferritin purification with minimal impurities, suitable for medical applications and drug delivery systems.
Implementation Method 1
The novel proteins of the present invention provide specific binding to ferritin with a binding affinity of less than 100 nM
Data Source
Figure 1~2
Figure 3A~3B
AI summary
The present invention relates to novel proteins that specifically bind to the ferritin. The novel proteins of the present invention are advanced and powerful tools because they allow precise purification methods of ferritin, for example via affinity chromatography. Further, the binding protein for ferritin is useful for methods to analyze the presence of ferritin.