Sorbitol dehydrogenases in Acetobacter suboxydans.
نویسندگان
چکیده
It has previously been shown that cell-free extracts of Acetobacter subozydans possess two pathways for the oxidation of sorbitol (1). In the presence of DPN,l fructose is produced; with TPN, sorbose is formed. The primary purpose of this paper is to describe the separation of these two dehydrogenases from each other. The DPN enzyme free from TPN activity has been concentrated about lBfold, whereas the TPN enzyme is fragile and apparently destroyed during fractionation.
منابع مشابه
The biological oxidation of sorbitol.
Sorbitol is fermented in good yields to sorbose by some of the members of the Acetobacter species (1, 2). Resting cells of Acetobacter suboxydans may, in the absence of a source of nitrogen, oxidize sorbitol with the consumption of over 4 atoms of oxygen per molecule of substrate (3, 4). From a study of dinitrophenol action on this organism, the first step in sorbitol oxidation was shown to be ...
متن کاملSources of energy and the dinitrophenol effect in the growth of Acetobacter suboxydans.
In resting Acetobacter suboxydans cells, glycerol can be oxidized beyond the dihydroxyacetone stage, and sorbitol, beyond the sorbose stage (King and Cheldelin, 1952a). 2 ,4-Dinitrophenol inhibits the further oxidation of dihydroxyacetone or sorbose but has no effect upon the first step oxidations (King and Cheldelin, 1952b). Since these keto derivatives can be metabolized further by resting ce...
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Acetobacter suboxydans is known to bring about oxidation of polyhydroxy compounds. The action of the bacterial enzyme is limited, however, to substances with specific configurations. According to the generalization of Bertrand,’ only those hydroxyl groups are oxidized which are situated between a primary hydroxyl group and a secondary one in a cis position. Hann, Tilden, and Hudson,2 in a compa...
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It has been shown that glycerol can be oxidized beyond the dihydroxyacetone (DHA) stage by resting Acetobacter suboxydans cells (1). Through washing and centrifuging of the cells at room temperature, most of the oxidative activity was destroyed, which, however, could be restored by the addition of inorganic phosphate and diphosphopyridine nucleotide (DPN). 2,4-Dinitrophenol (DNP), a phosphate “...
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It has been shown that glycerol can be oxidized beyond the dihydroxyacetone (DHA) stage by resting Acetobacter suboxydans cells (1). Through washing and centrifuging of the cells at room temperature, most of the oxidative activity was destroyed, which, however, could be restored by the addition of inorganic phosphate and diphosphopyridine nucleotide (DPN). 2,4-Dinitrophenol (DNP), a phosphate “...
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ورودعنوان ژورنال:
- The Journal of biological chemistry
دوره 226 1 شماره
صفحات -
تاریخ انتشار 1957