Enzyme-directed Immobilization Strategies for Biosensor Applications
10.16476/j.pibb.2024.0256
- VernacularTitle:酶定向固定化策略在生物传感器中应用
- Author:
Xing-Bao WANG
1
;
Yao-Hong MA
1
;
Yun-Long XUE
1
;
Xiao-Zhen HUANG
1
;
Yue SHAO
1
;
Yi YU
1
;
Bing-Lian WANG
1
;
Qing-Ai LIU
1
;
Li-He ZHANG
1
;
Wei-Li GONG
1
Author Information
1. Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250103, China
- Publication Type:Journal Article
- Keywords:
enzyme immobilization;
enzyme electrode;
biosensor;
spatial orientation of enzyme molecules
- From:
Progress in Biochemistry and Biophysics
2025;52(2):374-394
- CountryChina
- Language:Chinese
-
Abstract:
Immobilized enzyme-based enzyme electrode biosensors, characterized by high sensitivity and efficiency, strong specificity, and compact size, demonstrate broad application prospects in life science research, disease diagnosis and monitoring, etc. Immobilization of enzyme is a critical step in determining the performance (stability, sensitivity, and reproducibility) of the biosensors. Random immobilization (physical adsorption, covalent cross-linking, etc.) can easily bring about problems, such as decreased enzyme activity and relatively unstable immobilization. Whereas, directional immobilization utilizing amino acid residue mutation, affinity peptide fusion, or nucleotide-specific binding to restrict the orientation of the enzymes provides new possibilities to solve the problems caused by random immobilization. In this paper, the principles, advantages and disadvantages and the application progress of enzyme electrode biosensors of different directional immobilization strategies for enzyme molecular sensing elements by specific amino acids (lysine, histidine, cysteine, unnatural amino acid) with functional groups introduced based on site-specific mutation, affinity peptides (gold binding peptides, carbon binding peptides, carbohydrate binding domains) fused through genetic engineering, and specific binding between nucleotides and target enzymes (proteins) were reviewed, and the application fields, advantages and limitations of various immobilized enzyme interface characterization techniques were discussed, hoping to provide theoretical and technical guidance for the creation of high-performance enzyme sensing elements and the manufacture of enzyme electrode sensors.
