Symbiobacterium thermophilum

Symbiobacterium thermophilum is a symbiotic thermophile that depends on co-culture with a Bacillus strain for growth. It is Gram-negative and tryptophanase-positive, with type strain T(T) (= IAM 14863T). It is the type species of its genus. Its genome has been sequenced, and has a size of 3.57 Mbp, with 3338 protein-coding genes. Symbiobacterium is related to the Gram-positive Firmicutes and Actinobacteria, but belongs to a lineage that is distinct from both.