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Sulfide quinone reductase (SQR) activity in Chlorobium
Author(s) -
Shahak Y.,
Arieli B.,
Padan E.,
Hauska G.
Publication year - 1992
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(92)80230-e
Subject(s) - chemistry , sulfide , reductase , sulfur , quinone , oxidizing agent , chlorosome , cyanide , biochemistry , inorganic chemistry , organic chemistry , enzyme , bacteriochlorophyll , photosynthesis
Membranes of the green sulfur bacterium, Chlorobium limicola f, thiosulfatophilum , catalyze the reduction of externally added isoprenoid quinones by sulfide. This activity is highly sensitive to stigmatellin and aurachins. It is also inhibited by 2‐ n ‐nonyl‐4‐hydroxyquinoline‐ N ‐oxide, antimycin, myxothiazol and cyanide. It is concluded that in sulfide oxidizing bacteria like Chlorobium , sulfide oxidation involves a sulfide‐quinone reductase (SQR) similar to the one found in Oscilatoria limnetica [Arieli, B., Padan, E. and Shahak, Y. (1991) J. Biol. Chem. 266. 104–111].