1.12.98.4: sulfhydrogenase

This is an abbreviated version!
For detailed information about sulfhydrogenase, go to the full flat file.

Word Map on EC 1.12.98.4

Reaction

H2
+
(sulfide)n
=
hydrogen sulfide
+
(sulfide)n-1

Synonyms

H-II, H2:sulfuroxidoreductase complex, hydrogenase II, NiFe sulfhydrogenase, polysulfide dehydrogenase, polysulfide reductase, reductase, sulfur, SH2ase, sulfhydrogenase, sulfur reductase, sulhydrogenase

ECTree

     1 Oxidoreductases
         1.12 Acting on hydrogen as donor
             1.12.98 With other, known, physiological acceptors
                1.12.98.4 sulfhydrogenase

Substrates Products

Substrates Products on EC 1.12.98.4 - sulfhydrogenase

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SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
disulfide + electron donor
H2S
show the reaction diagram
-
cystine and cystamine, minimal activities, PDH
-
?
H2 + benzyl viologen
H2S + reduced benzyl viologen
show the reaction diagram
highest activity
-
-
?
H2 + methyl viologen
H2S + reduced methyl viologen
show the reaction diagram
H2 + NADP+
H2S + NADPH + H+
show the reaction diagram
-
-
-
-
r
H2 + polysulfide(n)
H2S + polysulfide(n-1)
show the reaction diagram
H2S + NADH + H+
H2 + NAD+
show the reaction diagram
-
NADH is a very inefficient electron carrier for sulfhydrogenase
-
-
r
H2S + NADPH + H+
H2 + NADP+
show the reaction diagram
-
-
-
-
r
NADPH + H+ + polysulfide(n)
NADP+ + polysulfide(n-1)
show the reaction diagram
-
-
-
r
organic trisulfides + electron donor
H2S + oxidized electron donor
show the reaction diagram
polysulfide + electron donor
H2S + oxidized electron donor
show the reaction diagram
polysulfide + H2
H2S
show the reaction diagram
-
-
-
-
?
S + H2
H2S
show the reaction diagram
-
-
-
-
?
sulfur
H2S
show the reaction diagram
sulfur + electron donor
H2S + oxidized electron donor
show the reaction diagram
sulfur + H2
H2S
show the reaction diagram
-
in solubilized membrane fraction no activity is detected without the addition of electron carriers: 2,3-dimethylnaphthoquinone, plastoquinone or horse heart cytochrome c
-
-
?
tetrasulfide + electron donor
H2S + oxidized electron donor
show the reaction diagram
-
comparable to colloidal sulfur
-
?
tetrathionate + H2
? + H+
show the reaction diagram
-
-
-
-
?
additional information
?
-