Fusion Collagenase Affinity Tag Purification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge lies in selectively collecting non-degraded collagenase from Clostridium histolyticum, as existing methods struggle to differentiate it from degraded collagenase due to similar physicochemical properties, affecting the quality of isolated pancreatic islets during transplantation.
Innovation Solution
A fusion collagenase is produced by linking an affinity tag to the carboxyl terminal of the collagenase, allowing for selective collection through affinity chromatography, as the degraded collagenase is separated from the affinity tag when degraded, enabling purification and maintaining collagenase activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ion-exchange chromatography or hydrophobic chromatography is used to separate non-degraded collagenase from degraded collagenase, then separation is attempted, but the separation efficiency is poor because both forms have similar physicochemical properties
Solution Approach 1:
The invention changes the physicochemical parameter of the collagenase by fusing an affinity tag (such as a polyhistidine tag) to the C-terminal end of the collagenase molecule. This modification alters the interaction properties of the collagenase with the chromatography medium, enabling selective adsorption of non-degraded collagenase on nickel ion-exchange columns while degraded forms pass through, thereby achieving effective separation based on the introduced affinity parameter
Solution Approach 2:
The affinity tag acts as an intermediary element that mediates the interaction between collagenase and the nickel ion-exchange chromatography medium. This intermediary component provides a specific binding interface that distinguishes non-degraded collagenase from degraded forms, enabling selective separation without requiring complex chromatography conditions
2Reliability
If affinity chromatography with nickel ion-exchange column is used to purify fusion collagenase, then non-degraded collagenase is selectively collected, but the purification process requires specific affinity tag design and column conditions
Solution Approach 1:
The invention extracts the purification function from complex chromatography procedures by introducing a simple affinity tag sequence that can be easily removed or retained. The polyhistidine tag fused to the C-terminal end provides a built-in purification handle that simplifies the manufacturing process through a single-step nickel ion-exchange chromatography, while the tag can be subsequently removed if needed for final product applications
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
This method efficiently produces a high-purity collagenase, ensuring the quality of pancreatic islets during transplantation by effectively removing degraded collagenase, thereby enhancing the isolation process.
Implementation Method 1
purified by affinity chromatography corresponding to an affinity tag to thereby selectively collect the fusion collagenase
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A fusion collagenase in which an affinity tag is added to the carboxyl terminal of a collagenase was expressed as a recombinant protein. It was found that a collagenase having a collagen-binding domain can be selectively collected by purifying the obtained fusion collagenase by affinity chromatography.