Modified Oxidoreductase Nanoparticles for pH and Thermal Stability
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Solution Overview
Problem
Natural redox enzymes are sensitive to environmental conditions, leading to stability and reusability issues, while nanozymes lack specificity and pose biocompatibility concerns, and their synthesis is complex and costly, hindering large-scale production and clinical translation.
Innovation Solution
A modified oxidoreductase with dehydrogenated thiol or amino groups and hydrophobic modification chain segments, enabling self-assembly into stable nanoparticles with enhanced stability and catalytic efficiency, and amphiphilic properties for improved biocompatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If natural redox enzymes are used, then high catalytic efficiency and specificity are achieved, but stability under various environmental conditions deteriorates
Solution Approach 1:
The patent creates a composite structure by co-assembling modified redox enzymes with amphiphilic block copolymers to form hybrid nanoparticles. The copolymer components (hydrophobic and hydrophilic blocks) provide structural stability and protective functions while the modified enzymes retain catalytic activity, achieving both high catalytic efficiency and environmental stability through material composition optimization.
Solution Approach 2:
The amphiphilic block copolymer forms a flexible protective shell around the redox enzyme core in the nanoparticle structure. This polymer shell acts as a protective film that shields the enzyme from harsh environmental conditions (temperature, pH, organic solvents) while allowing substrate access, thereby maintaining enzyme stability without compromising catalytic function.
2Stability of the object's composition
If nanozymes are used to enhance stability, then stability and catalytic efficiency are improved, but biocompatibility deteriorates due to metal or metal oxide materials
Solution Approach 1:
Instead of using metal-based nanozymes that mimic enzyme function but lack biocompatibility, the patent copies the structure and function of natural redox enzymes by chemically modifying them (dehydrogenation and block copolymer conjugation) to create stable, biocompatible nanoparticles that retain the original enzyme's safety profile while enhancing stability through the protective polymer shell.
Solution Approach 2:
The patent changes the physical and chemical parameters of the redox enzyme by dehydrogenating specific amino acid residues (creating dehydrogenated forms) and conjugating block copolymers, thereby transforming the enzyme into a nanoparticle form that maintains biocompatibility while achieving enhanced stability under various environmental conditions.
3Stability of the object's composition
If nanozymes are synthesized to protect the active center, then stability is enhanced, but manufacturing complexity increases due to harsh synthesis conditions
Solution Approach 1:
The modified redox enzymes (with dehydrogenated groups and block copolymer conjugates) possess inherent self-assembling properties that enable them to spontaneously form stable nanoparticles under mild physiological conditions without requiring harsh synthesis procedures. The amphiphilic nature of the conjugated enzymes drives automatic organization into nanoparticle structures, eliminating the need for high temperature, pressure, or complex chemical synthesis steps.
4Stability of the object's composition
If redox enzymes are modified with block copolymers to form nanoparticles, then stability and biocompatibility are enhanced, but device complexity increases
Solution Approach 1:
The nanoparticle is segmented into distinct functional domains: a core region containing the modified redox enzyme (with dehydrogenated active sites) and an outer shell composed of amphiphilic block copolymers with hydrophobic and hydrophilic segments. This segmentation allows each component to perform its specific function independently while maintaining overall structural organization and simplifying the understanding of the complex nanoparticle 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
The modified redox enzyme maintains high activity and catalytic efficiency across various pH and temperature conditions, reducing denaturation and enhancing biocompatibility, suitable for applications in biomedicine, environmental technology, and biofuel production.
Implementation Method 1
the modified redox enzyme can self-assemble into multifunctional enzyme nanoparticles
Implementation Method 2
The modified redox enzyme exhibits amphiphilic molecular properties
Implementation Method 3
each of the enzyme nanoparticles being formed by crosslinking a plurality of modified oxidoreductases and a plurality of aldehyde or aldonic acid molecules
Implementation Method 4
maintains high activity and catalytic efficiency across various pH and temperature conditions, reducing denaturation
Implementation Method 5
maintains high activity and catalytic efficiency across various pH and temperature conditions
Data Source
AI summary
A modified redox enzyme includes a dehydrogenated redox enzyme and a modification chain segment. The dehydrogenated redox enzyme includes at least one dehydrogenated thiol group, and the modification chain segment has a structure of Formula (1) and is bonded to the dehydrogenated thiol group. The dehydrogenated redox enzyme includes at least one dehydrogenated amino group, and the modification chain segment has the structure of Formula (2) and is bonded to the dehydrogenated amino group.A1 is a first chain segment having a first π-conjugated system, X is hydrogen, alkyl, carboxyl, amide, or ester group, n1 is an integer from 0 to 20, and m1 is an integer from 0 to 20;A2 is a second chain segment having a second π-conjugated system, n2 is an integer from 0 to 20, and m2 is an integer from 0 to 20.