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. 1967 Nov;94(5):1484–1491. doi: 10.1128/jb.94.5.1484-1491.1967

Catabolite Repression in the Facultative Chemoautotroph Thiobacillus novellus

H B LéJohn a, L Van Caeseele a,1, H Lees a
PMCID: PMC276852  PMID: 6057804

Abstract

Several fermentable carbon sources were found to give rise to catabolite repression of all enzymes implicated in thiosulfate oxidation in the facultative chemoautotroph, Thiobacillus novellus. Glucose was found to elicit a strong repression. Glycerol, lactate, lactose, ribose, and pyruvate caused marked repression. In all cases, the repression could be relieved only by returning the cells to a medium devoid of such fermentable substrates. On the other hand, carbon compounds (amino acids and organic acids) that are metabolizable only aerobically caused transient or no repression of the thiosulfate oxidative system. All of the enzymes believed to participate in thiosulfate oxidation, except tetrathionase, were found to be simultaneously induced and repressed. This would suggest that tetrathionate may not be a necessary intermediate in the thiosulfate-oxidation pathway of T. novellus.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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