Cell-Free Protein Purification Using Fluorescence and Magnetic Beads

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Solution Overview

Problem

Existing protein purification methods require complex analysis techniques involving electrophoresis and gel-based separations, which are time-consuming and inefficient for rapid protein characterization and purification.

Innovation Solution

A method for protein synthesis and purification using cell-free systems that incorporates a fluorescent protein sub-component for yield measurement, followed by affinity purification and total protein content measurement without the need for electrophoresis, utilizing magnetic beads and fluorescence complementation for real-time monitoring.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional electrophoresis and gel-based separation methods are used for protein purification and analysis, then measurement precision and protein characterization accuracy are improved, but device complexity and time consumption increase significantly

Engineering Contradiction:

Improveprotein characterization accuracyVSAvoidcomplexity of analysis techniques

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces mechanical electrophoresis and gel-based separation systems with a magnetic bead-based affinity purification system combined with fluorescence measurement. This substitution eliminates the need for complex electrophoresis apparatus and gel electrophoresis procedures, achieving protein purification and characterization through magnetic separation and optical detection instead.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces magnetic beads as an intermediary medium for protein purification. These beads functionalized with affinity ligands (such as Ni-NTA for His-tags or Streptavidin for Strep-tags) serve as a mediator to selectively bind target proteins, enabling purification without direct use of complex separation electrophoresis systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If traditional gel-based separation methods are used for protein purification, then protein purity and yield measurement are improved, but loss of time and productivity decrease

Engineering Contradiction:

Improveprotein purity and yieldVSAvoidtime consumption

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent incorporates affinity tags (such as His-tags, Strep-tags, or other binding moieties) into the protein of interest during the expression stage. This preliminary action enables subsequent rapid purification through affinity chromatography using magnetic beads, eliminating the need for time-consuming gel electrophoresis and significantly reducing purification time while maintaining protein purity and yield.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent changes the measurement parameter from electrophoretic mobility and gel staining to fluorescence intensity. By using fluorescently labeled magnetic beads or fluorescent protein tags, the system achieves rapid quantification of protein purity and yield through fluorescence measurement, which is much faster than traditional gel-based methods.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If cell-free protein synthesis is used for rapid protein production, then productivity is improved, but the complexity of purification and characterization remains high

Engineering Contradiction:

Improverapid protein productionVSAvoidpurification and characterization complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent designs protein expression systems where the same affinity tag (such as His-tag, Strep-tag, or fluorescent protein tag) serves multiple functions: it enables both the rapid production of protein in cell-free systems and subsequent purification through affinity chromatography. This multi-functionality reduces the overall complexity by combining production and purification capabilities into a unified system.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent replaces complex mechanical gel electrophoresis systems with optical fluorescence measurement systems for protein characterization. This substitution maintains the rapid production capability of cell-free synthesis while simplifying the characterization step through non-invasive fluorescence detection, thereby reducing overall device complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 rapid and efficient protein purification and characterization without gel-based separations, allowing for real-time monitoring and optimization of expression and purification conditions.

Implementation Method 1

measuring the yield of expressed protein using a fluorescence measurement

Methodology Applied

Scientific EffectFluorescence: Fluorescence

Implementation Method 2

purifying the protein by affinity purification

Methodology Applied

Scientific EffectAffinity binding: Adsorption

Data Source

PatentUS20260008809A1Protein purification

Publication Date: 2026.01.08 NUCLERA LTD

AI summary

The invention provided herein relates to methods for protein synthesis, purification and characterisation.