Microbial Enzyme Production and Applications in Biotechnology

Microbial enzymes are central to modern biotechnology, harnessing the catalytic power of bacteria, fungi and archaea for sustainable production of chemicals, pharmaceuticals, food ingredients and environmental solutions. Microorganisms offer a vast diversity of enzymes that can be screened from natural habitats or engineered through recombinant techniques to improve stability, activity and substrate specificity. Advances in high-throughput screening, synthetic biology and protein engineering have enabled the discovery and optimisation of enzymes that function under extreme pH, temperature or salinity. Industrial deployment spans food processing (flavour enhancers, dairy and meat tenderisation), green chemistry (biocatalytic synthesis of fine chemicals), biofuel production (cellulases and lipases), textile and paper manufacturing (amylases and laccases) and therapeutic applications (anticancer and antimicrobial enzymes). The integration of enzyme cascades and immobilisation strategies further enhances process efficiency and reuse, driving a transition towards environmentally benign and economically viable bioprocesses with global impact.

Research from Nature Portfolio

A landmark study reported the heterologous expression and detailed biochemical characterisation of an L-glutaminase from an extremophile bacterium, revealing exceptional thermo- and halo-tolerance. The enzyme maintained over 70 % activity across a broad pH range (4–11) and temperatures up to 60 °C, with kinetic parameters indicating high substrate affinity and catalytic efficiency. Structural analyses predicted a stabilising disulphide bond and a crucial cysteine in the active site, underpinning resistance to proteolysis and salt-induced denaturation. This work establishes a framework for mining and engineering robust enzymes for both food-grade and pharmaceutical biocatalysis, illustrating how fundamental insights can guide industrial deployment of microbial catalysts.

Microbial Enzyme Production and Applications in Biotechnology publication trend

The graph below shows the total number of articles in microbial enzyme production and applications in biotechnology across all publications each year (not limited to Nature Index journals).

Technical terms

L-glutaminase: An enzyme that hydrolyses L-glutamine to glutamic acid and ammonia, used in anticancer therapy and food flavour enhancement.

Heterologous expression: Production of an enzyme in a non-native host organism to enable higher yield or ease of purification.

Synthetic biology: The design and construction of novel biological parts or systems, including enzyme variants with improved properties.

Kinetic parameters (Km, Vmax): Metrics that describe substrate affinity (Km) and maximum catalytic rate (Vmax) of an enzyme under defined conditions.

Catalytic efficiency: The ratio of turnover number to Km, reflecting how effectively an enzyme converts substrate to product.

References

1. Shiitake mushroom (Lentinula edodes) extract has chloride-activated glutaminase activity that efficiently increases glutamic acid in foods with sodium chloride. International Journal of Gastronomy and Food Science (2024).
2. A Novel Salt-Tolerant L-Glutaminase: Efficient Functional Expression, Computer-Aided Design, and Application. Fermentation (2022).
3. Novel halo- and thermo-tolerant Cohnella sp. A01 L-glutaminase: heterologous expression and biochemical characterization. Scientific Reports (2019).
4. Production, characterization, and antitumor efficiency of l-glutaminase from halophilic bacteria. Bulletin of the National Research Centre (2022).