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Information on EC 2.8.5.2 - L-cysteine S-thiosulfotransferase

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EC Tree
     2 Transferases
         2.8 Transferring sulfur-containing groups
             2.8.5 Thiosulfotransferases
                2.8.5.2 L-cysteine S-thiosulfotransferase
IUBMB Comments
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 - early in the pathway it attaches a thiosulfate molecule to the sulfur atom of an L-cysteine of a SoxY protein; later it transfers a second thiosulfate molecule to a sulfane group that is already attached to the same cysteine residue.
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Word Map
The enzyme appears in viruses and cellular organisms
Reaction Schemes
[SoxY protein]-L-cysteine
+
+
2
=
[SoxY protein]-S-sulfosulfanyl-L-cysteine
+
2
+
2
[SoxY protein]-S-sulfanyl-L-cysteine
+
+
2
=
[SoxY protein]-S-(2-sulfodisulfanyl)-L-cysteine
+
2
+
2
Synonyms
complex SoxXA, SoxAX, SoxAX complex, SoxXA, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
[SoxY protein]-L-cysteine + thiosulfate + 2 ferricytochrome c = [SoxY protein]-S-sulfosulfanyl-L-cysteine + 2 ferrocytochrome c + 2 H+
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(1)
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-
-
[SoxY protein]-S-sulfanyl-L-cysteine + thiosulfate + 2 ferricytochrome c = [SoxY protein]-S-(2-sulfodisulfanyl)-L-cysteine + 2 ferrocytochrome c + 2 H+
show the reaction diagram
(2)
-
-
-
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