ArticleEnvironmental microbiology reports2026
Advancing the Resolution of the Sulfur Compound Disproportionation Puzzle in Dissulfuribacter Thermophilus S69ᵀ Through Quantitative Label-Free Comparative Proteomics.
Article in Environmental microbiology reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In deep-sea hydrothermal vents, sulfur compounds are central for microbial bioenergetics. Despite its significant impact on the global sulfur cycle, anaerobic sulfur compound disproportionation remains the least understood metabolism, with only three bacterial strains having been investigated at the proteomic level for their sulfur disproportionation metabolism to date. Here, we present a comparative proteomics study of the chemolithoautotrophic sulfur-cycling species Dissulfuribacter thermophilus S69ᵀ. Upon thiosulfate disproportionation conditions, proteomics revealed a high abundance of a cytoplasmic thiosulfate reductase AB homologue (PhsAB-like) that might reductively cleave thiosulfate into sulfide and sulfite. Subsequent steps might involve enzymes from the dissimilatory sulfate reduction, with Apr and Sat potentially functioning in reverse to produce sulfate. Strain S69
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