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

BMC Microbiology

Research Article

Madeleine Blomqvist¹  Gunnel Svensäter¹  Amina Basic²  Gunnar Dahlén² 

[1] Department of Oral Biology, Institute of Odontology, Malmö University, Malmö, Sweden;Department of Oral Microbiology and Immunology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;

关键词: Periodontitis;    Hydrogen sulfide;    Fusobacterium spp.;    Enzymes;    Bismuth sulfide;    Proteomics;    2D gel electrophoresis;    LC-MS/MS;   

DOI  :  10.1186/s12866-017-0967-9

 received in 2016-12-27, accepted in 2017-03-01,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundHydrogen sulfide (H2S) 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 H2S-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. nucleatum polymorphum ATCC 10953. The proteins were subjected to one-dimensional (1DE) and two-dimensional (2DE) gel electrophoresis An in-gel activity assay was used to detect the H2S-producing enzymes; Sulfide from H2S, produced by the enzymes in the gel, reacted with bismuth forming bismuth sulfide, illustrated as brown bands (1D) or spots (2D) in the gel. The discovered proteins were identified with liquid chromatography – tandem mass spectrometry (LC-MS/MS).ResultsCysteine synthase and proteins involved in the production of the coenzyme pyridoxal 5′phosphate (that catalyzes the production of H2S) were frequently found among the discovered enzymes. Interestingly, a higher expression of H2S-producing enzymes was detected from bacteria incubated without cysteine prior to the experiment.ConclusionsNumerous enzymes, identified as cysteine synthase, were involved in the production of H2S from cysteine and the expression varied among Fusobacterium spp. and strains. No enzymes were detected with the in-gel activity assay among the other periodontitis-associated bacteria tested. The expression of the H2S-producing enzymes was dependent on environmental conditions such as cysteine concentration and pH but less dependent on the presence of serum and hemin.

【 授权许可】

CC BY   
© The Author(s). 2017