Actinobacterial biocatalysts are enzymes produced by actinobacteria, a diverse group of prokaryotes known for their ability to thrive in various environments. These biocatalysts play crucial roles in biotechnological applications due to their robustness and versatility. They are utilized in industries such as pharmaceuticals, agriculture, and environmental remediation. One prominent example is the production of antibiotics like streptomycin and erythromycin, which are pivotal in combating bacterial infections. Actinobacterial enzymes also contribute to the degradation of complex organic compounds, aiding in bioremediation efforts. Their ability to function under extreme conditions, including high temperatures and acidic environments, enhances their appeal for industrial processes. Moreover, actinobacterial biocatalysts are pivotal in synthesizing valuable chemicals and biofuels from renewable resources, promoting sustainable practices. The topics included in this book on actinobacterial biocatalysts are of utmost significance and bound to provide incredible insights to readers. The various applications along with technological progress that have future implications are glanced at in this book. For all those who are interested in biocatalysts, this book can prove to be an essential guide.