Affiliation:
1. Department of Bacteriology, Rutgers, The State University, New Brunswick, New Jersey
Abstract
Adair, Frank
W. (Rutgers, The State University, New Brunswick, N. J.). Membrane-associated sulfur oxidation by the autotroph
Thiobacillus thiooxidans
. J. Bacteriol.
92:
899–904. 1966.—Washed cell wall-membrane fragments derived from sulfur-grown cells of the strictly autotrophic bacterium,
Thiobacillus thiooxidans
, oxidized elemental sulfur to sulfate without the addition of cofactors. The oxidation was optimal at
p
H 7.0 and was increased by the presence of wetting agents. Oxygen uptake was inhibited by cyanide, azide, and thiol-binding agents. Sulfite was also oxidized, and both the sulfur- and sulfite-oxidizing systems were heat-labile. Neither thiosulfate nor tetrathionate was oxidized by soluble or membrane preparations. The fragments fixed C
14
O
2
in the presence of ribose-5-phosphate, Mg
++
, and adenosine triphosphate. Sulfur oxidation did not provide energy for C
14
O
2
fixation in this system.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
Reference19 articles.
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