Actinobacteria are a group of bacteria known for their high G+C content in DNA. They are primarily found in soil and water, playing a crucial role in decomposing organic matter. This process helps recycle nutrients in ecosystems, making them essential for soil health. Many Actinobacteria produce antibiotics, which are substances that can kill or inhibit the growth of other microorganisms. One well-known example is Streptomyces, a genus of Actinobacteria that has been a significant source of many antibiotics used in medicine today. Their diverse metabolic capabilities also make them important in biotechnology and environmental applications.