Enzymes of Carbohydrate Metabolism in Thiobacillus species
AUTOR(ES)
Matin, Abdul
RESUMO
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.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=246902Documentos Relacionados
- Enzymes of Intermediary Carbohydrate Metabolism in the Obligate Autotrophs Thiobacillus thioparus and Thiobacillus neapolitanus1
- Enzymes of Carbohydrate Metabolism in the Developing Rice Grain
- Pathways of Carbohydrate Metabolism in Microcyclus Species
- Enzymes of Carbohydrate Metabolism in the Developing Endosperm of Maize 1
- Diurnal Variations in Some Enzymes of Carbohydrate Metabolism in Tapioca Leaves 12
