Phylogenomics, phenotypic, and functional traits of five novel (Earth-derived) bacterial species isolated from the International Space Station and their prevalence in metagenomes

This research paper explores the fascinating world of tiny life forms that live on surfaces in space, like those found aboard a spaceship. Scientists collected samples from different spots inside an International Space Station (ISS) and discovered six new types of microorganisms-tiny living things too small to see without powerful equipment-that they couldn't identify before because they were so unique or rare on Earth. The discovery is exciting for several reasons: these tiny organisms might help us understand how life can survive in space, which could be important if we ever hope to live there long-term; it may lead to new ways of using microbes that are beneficial and safe (biotechnology); they also show the importance of protecting all parts of an ecosystem-even those as small as a spaceship's surfaces. The researchers found these mysterious organisms by taking samples from places like exercise equipment used in space, where astronauts work out to stay healthy while away for months or years at a time.

The research paper presents a comprehensive study of novel microbial strains isolated from the International Space Station's surfaces, with an emphasis on understanding their potential ecological roles and biotechnological applications. The methodology employed in this investigation involved sample collection using pre-packaged wipes during two mission series (MT-1 and MT-2), followed by isolation of microbial strains from the Advanced Resistive Exercise Device platform as well as crew quarters when cultured on blood agar or R2A media. The study identified six novel bacterial species, which were initially classified based on their genetic profiles obtained through 16S rRNA gene sequencing and subsequent subsystem analysis (e.g., IIF3SC-B10T with 283 subsystems). The researchers also examined the metabolic capabilities of these strains by analyzing amino acid, carbohydrate metabolism genes, as well as their resistance to heavy metals and antibiotics.