MGI(688114) Zheng Quan Shi Bao Wang·2025-05-20 04:10Core Insights - A new microbial species named "Niallia tiangongensis" has been discovered in the Chinese space station, marking a significant advancement in understanding microbial diversity in space [1][2][3] Group 1: Discovery and Significance - The discovery of Niallia tiangongensis expands knowledge of microbial diversity in extreme space environments, showcasing China's capabilities in space exploration [1][2] - The research was published in the International Journal of Systematic and Evolutionary Microbiology, highlighting its scientific importance [2] Group 2: Research Methodology - The research utilized the DNBSEQ-T7 sequencing platform developed by BGI Genomics, which is capable of generating at least 7Tb of data in 24 hours, demonstrating advanced technological capabilities [1][2] - Samples were collected by astronauts during the Shenzhou 15 mission in May 2023, using sterile wipes to gather microbial samples from various surfaces within the space station [3] Group 3: Microbial Characteristics - Niallia tiangongensis is a Gram-positive, aerobic, spore-forming rod with a genome size of 5,166,230 base pairs and a G+C content of 35.6 mol% [3][4] - The species exhibits unique traits, including the ability to hydrolyze gelatin, indicating its adaptability to nutrient-limited environments [4] Group 4: Genetic Analysis - Genomic analysis revealed significant differences between Niallia tiangongensis and its closest terrestrial relative, Niallia circulans, with only 83.3% genomic similarity, below the species definition threshold of 95% [3][4] - Key mutations in proteins associated with oxidative stress response and radiation damage repair were identified, enhancing its survival capabilities in space [4]