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. 1971 Jul;107(1):179–186. doi: 10.1128/jb.107.1.179-186.1971

Enzymes of Carbohydrate Metabolism in Thiobacillus species

Abdul Matin 1, Sydney C Rittenberg 1
PMCID: PMC246902  PMID: 5563867

Abstract

A study was made of enzymes of carbohydrate metabolism in representative thiobacilli grown with and without glucose. The data show that Thiobacillus perometabolis possesses an inducible Entner-Doudoroff pathway and is thus similar to T. intermedius and T. ferrooxidans. T. novellus lacks this pathway. Instead, a non-cyclic pentose phosphate pathway along with the Krebs cycle is apparently the major route of glucose dissimilation in this organism. Glucose does not support or stimulate the growth of strains of T. neapolitanus, T. thioparus, and T. thiooxidans examined, nor does its presence in the growth medium greatly influence their enzymatic constitution. These obligately chemolithotrophic thiobacilli do not possess the Entner-Doudoroff pathway. Their nicotinamide adenine dinucleotide (NAD)-linked isocitrate dehydrogenase activity predominates over their nicotinamide adenine dinucleotide phosphate (NADP)-linked activity; the converse is true for the other thiobacilli. The data suggest that NAD-linked isocitrate dehydrogenase activity in thiobacilli is involved in biosynthetic reactions.

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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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