The proteins of Fusobacterium spp. involved in hydrogen sulfide production from L-cysteine.

Background: Hydrogen sulfide (HS) is a toxic foul-smelling gas produced by subgingival biofilms in patients with periodontal disease and is suggested to be part of the pathogenesis of the disease. We studied the HS-producing protein expression of bacterial strains associated with periodontal disease. Further, we examined the effect of a cysteine-rich growth environment on the synthesis of intracellular enzymes in F.