Sulfide quinone reductase (SQR) activity in Chlorobium

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, my...

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Veröffentlicht in:	FEBS letters 1992-03, Vol.299 (2), p.127-130
Hauptverfasser:	Shahak, Y., Arieli, B., Padan, E., Hauska, G.
Format:	Artikel
Sprache:	eng
Schlagworte:	2-iodo-6-isopropyl-3-methyl-2′-4,4′-trinitrodiphenyl ether 2-n-nonyl-4-hydroxyquinoline-N-oxide 3-(3′,4′-dichlorophenyl)-1,1-dimethylurea 5-n-undecyl-6-hydroxy-4,7-dioxobenzothiazole Analytical, structural and metabolic biochemistry Bacteria - enzymology bacteriochlorophyll c Bchl c Biological and medical sciences Catalysis Chlorobium limicola DCMU DNP-INT Electron transport Enzymes and enzyme inhibitors Fundamental and applied biological sciences. Psychology menaquinone NQNO Oxidation-Reduction Oxidoreductases Photosynthesis plastoquinone-1(-2) PQ-1(-2) Quinone Reductases - antagonists & inhibitors Quinone Reductases - metabolism Quinone reductions Quinones - metabolism SQR Sulfide oxidation sulfide-quinone reductase Sulfides - metabolism ubiquinone-1(-2) UHDBT UQ-1(-2)
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Beschreibung
Zusammenfassung:	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].
ISSN:	0014-5793 1873-3468
DOI:	10.1016/0014-5793(92)80230-E