Extremophiles belong to members of all three domains of life, i.e., bacteria, archaea, and eukarya. However, a high proportion of extremophiles are archaea and bacteria. These microbes live under chemical and physical extremes that are usually lethal to cellular molecules, yet they not only manage to survive but even thrive in such conditions. Extremophiles have important practical and industrial uses. They are a valuable source of industrially important enzymes also known as extremozymes. Recent research has revealed that extremozymes have unique structural features essential for biocatalysis under extreme conditions. Extremozymes have great commercial values and are known for their potential use in biotechnology, biomining, and bioremediation.

1. Extremozymes and Their Applications 2. Enzymes from Extremely Thermophilic Bacteria and Archaea: Current Status and Future Prospects 3. Role of thermophilic cellulases and organisms in the conversion of biomass to biofuels 4. Microbial adaptation to extreme temperatures: An overview of molecular mechanisms to industrial application 5. Molecular mechanism behind cold and hot adaptation of extremozymes 6. Microbial thermostable hydrolases (amylase, lipase, keratinase) and polymerases: Biology and Application 7. Molecular Adaptations in Microorganisms for Extremozyme Production 8. Application of extremozymes in paper and pulp industries 9. Genetic and protein engineering of halophilic enzymes 10. Halozymes: Sources, catalytic mechanism and potential applications in industries 11. Industrial applications of enzymes from haloarchaea 12. Insights into upstreaming and downstreaming processes of microbial extremozymes 13. Reverse micellar systems as a versatile tool on halophilic biocatalysts 14. Advances in industrial biocatalysis through immobilized extremozymes 15. Biocontrol of fungal phytopathogens in saline soils by halophilic chitinase producing microbes