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EC 3.1.6.20 Details
show Brenda entryEC number
3.1.6.20
Accepted name
S-sulfosulfanyl-L-cysteine sulfohydrolase
Reaction
(1) [SoxY protein]-S-sulfosulfanyl-L-cysteine + H2O = [SoxY protein]-S-sulfanyl-L-cysteine + sulfate;;(2) [SoxY protein]-S-(2-sulfodisulfanyl)-L-cysteine + H2O = [SoxY protein]-S-disulfanyl-L-cysteine + sulfate
Other name(s)
SoxB
Systematic name
[SoxY protein]-S-sulfosulfanyl-L-cysteine sulfohydrolase
Comment
Contains Mn2+. The enzyme is part of the Sox enzyme system, which participates in a bacterial thiosulfate oxidation pathway that produces sulfate. It catalyses two reactions in the pathway. In both cases the enzyme hydrolyses a sulfonate moiety that is bound (either directly or via a sulfane) to a cysteine residue of a SoxY protein, releasing sulfate. The enzyme from Paracoccus pantotrophus contains a pyroglutamate (cycloglutamate) at its N-terminus.
History
created 2018
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1 Oxidoreductases
1.1 Acting on the CH-OH group of donors
1.14.14.2 created 1972, deleted 1976 1.14.14.4 created 2000, deleted 2002
