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EC 1.8.5.5 Details
EC number
1.8.5.5
Accepted name
thiosulfate reductase (quinone)
Reaction
sulfite + hydrogen sulfide + a quinone = thiosulfate + a quinol
Other name(s)
phsABC (gene names)
Systematic name
sulfite,hydrogen sulfide:quinone oxidoreductase
Comment
The enzyme, characterized from the bacterium Salmonella enterica, is similar to EC 1.17.5.3, formate dehydrogenase-N. It contains a molybdopterin-guanine dinucleotide, five [4Fe-4S] clusters and two heme b groups. The reaction occurs in vivo in the direction of thiosulfate disproportionation, which is highly endergonic. It is driven by the proton motive force that occurs across the cytoplasmic membrane.
History
created 2016, modified 2017
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