ENZYME TECHNOLOGY AND PROTEIN ENGINEERING: PRINCIPLES, IMMOBILIZATION STRATEGIES, AND INDUSTRIAL APPLICATIONS

Enzyme technology and protein engineering represent core components of modern biotechnology, integrating principles of biochemistry, molecular biology, and industrial microbiology to develop efficient, sustainable, and highly specific biocatalytic systems. Enzymes, as biological catalysts, play a pivotal role in accelerating biochemical reactions under mild conditions with exceptional specificity and efficiency. The advancement of enzyme technology has enabled large-scale production, purification, immobilization, and application of enzymes in diverse sectors including food processing, pharmaceuticals, clinical diagnostics, detergents, and environmental biotechnology. A key limitation of free enzymes—such as low stability, single-use constraints, and difficulty in recovery—has been effectively addressed through enzyme immobilization techniques. This article discusses major immobilization methods including adsorption, covalent bonding, entrapment, encapsulation, cross-linking, and affinity immobilization, highlighting their principles, procedures, advantages, and limitations. Furthermore, protein engineering has expanded the functional scope of enzymes by enabling deliberate modification of amino acid sequences to enhance catalytic efficiency, thermal and pH stability, substrate specificity, and resistance to inhibitors. Approaches such as rational design, directed evolution, and semi-rational engineering are reviewed with emphasis on their industrial and therapeutic relevance. The combined application of enzyme technology and protein engineering has significantly contributed to green chemistry, continuous bioprocessing, recombinant therapeutic protein production, and biosensor development. This comprehensive overview underscores the importance of these technologies in achieving sustainable industrial processes and advancing biomedical innovation.