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EC Tree
IUBMB Comments The reactions catalysed by this enzyme and by others in this subclass may be similar to those catalysed by EC 2.5.1.18 glutathione transferase.
The enzyme appears in viruses and cellular organisms
Synonyms
transhydrogenase, glutathione-homocystine,
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transhydrogenase, glutathione-homocystine
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2 glutathione + homocystine = glutathione disulfide + 2 homocysteine
the reactions catalyzed by this enzyme and by other in this subclass may be similar to those catalyzed by EC 2.5.1.18
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glutathione:homocystine oxidoreductase
The reactions catalysed by this enzyme and by others in this subclass may be similar to those catalysed by EC 2.5.1.18 glutathione transferase.
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2 glutathione + homocystine
glutathione disulfide + 2 homocysteine
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2 lysine + homocystine
glutathione disulfide + 2 homocysteine
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cysteine + homocystine
cystine + 2 homocysteine
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GSH + homocystine
GSSG + homocysteine
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r
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GSH + homocystine
GSSG + homocysteine
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r
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15.1
cysteine
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pH 5.2, 40°C
14.3
glutathione
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pH 5.2, 40°C
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0.056
cysteine
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pH 5.2, 40°C
0.078
glutathione
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pH 5.2, 40°C
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brenda
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brenda
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brenda
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A0A6P3CWX6_SHEEP
106
0
11784
TrEMBL
other Location (Reliability: 3 )
E3TEH5_ICTPU
106
0
11482
TrEMBL
other Location (Reliability: 2 )
A0A3Q7K7R0_CICAR
107
0
11116
TrEMBL
Secretory Pathway (Reliability: 5 )
B5X3J5_SALSA
489
0
54475
TrEMBL
other Location (Reliability: 3 )
B2ZA84_SHEEP
106
0
11784
TrEMBL
other Location (Reliability: 3 )
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79000 - 80000
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gel filtration
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dimer
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2 * 35000, SDS-PAGE
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synthesis
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maximum activity is obtained by nutritional optimization using GSH (0.4%) combined with homocystine (0.01%) and glucose (0.4%), NADH (30 mM) at medium initial pH 7.8. The yield of GHTHase is increased about 1.2 times upon starvation of the culture for two days, as compared to the non-sulfur starved culture. The GHTHase activity is increased by 13.7fold
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Racker, E.
Glutathione-homocystine transhydrogenase
J. Biol. Chem.
217
867-874
1955
Bos taurus
brenda
El-Sayed, A.; Hassan, A.; Yassin, M.; Hassan, A.
Characterization of glutathione-homocystine transhydrogenase as a novel isoform of glutathione S-transferase from Aspergillus flavipes
Pharm. Chem. J.
49
373-383
2015
Aspergillus flavipes
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brenda
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