Bacteroides fragilis str. S6L5

Bacteroides fragilis str. S6L5 is a Gram-negative, rod-shaped bacterium that is categorized as an anaerobe, meaning it thrives in environments devoid of oxygen. It typically exists in a single-cell arrangement and is classified as a chemoorganotroph, utilizing organic compounds as its energy source. This organism is free-living, indicating it does not rely on a host for survival despite being host-associated. Bacteroides fragilis str. S6L5 has a mesophilic optimal temperature of 37°C, which is consistent with the human body temperature, suggesting a potential ecological niche within the human gut microbiome. The bacterium possesses flagella, although it is noted to be non-motile. It features a complex cellular structure with two membranes and a single replicon. The presence of Bacteroides fragilis str. S6L5 in the microbiome is significant, as members of the Bacteroides genus are known for their roles in the decomposition of complex polysaccharides, contributing to gut health and nutrient absorption. The ability to survive in anaerobic conditions and its free-living nature may also indicate a resilience that allows it to adapt to fluctuations in the gut environment. Overall, the traits of Bacteroides fragilis str. S6L5 highlight its potential importance in maintaining a balanced gut microbiota and its role in human health.