Detection and characterization of sorbitol dehydrogenase from apple callus tissue.

  title={Detection and characterization of sorbitol dehydrogenase from apple callus tissue.},
  author={Fayek B. Negm and Wayne H. Loescher},
  journal={Plant physiology},
  volume={64 1},
Sorbitol dehydrogenase (l-iditol:NAD(+) oxidoreductase, EC has been detected and characterized from apple (Malus domestica cv. Granny Smith) mesocarp tissue cultures. The enzyme oxidized sorbitol, xylitol, l-arabitol, ribitol, and l-threitol in the presence of NAD. NADP could not replace NAD. Mannitol was slightly oxidized (8% of sorbitol). Other polyols that did not serve as substrate were galactitol, myo-inositol, d-arabitol, erythritol, and glycerol. The dehydrogenase oxidized NADH… 
Purification and Characteristics of Sorbitol-6-phosphate Dehydrogenase from Loquat Leaves.
  • M. Hirai
  • Biology, Chemistry
    Plant physiology
  • 1981
The enzyme was more effective in the direction of glucose-6-phosphate reduction than in the reverse direction at neutral pH, and it is suggested that the enzyme catalyzes sorbitol synthesis from glucose- 6-ph phosphate during photosynthesis in leaves of Rosaceous plants.
Characterization of a xylitol dehydrogenase and a d-arabitol dehydrogenase from the thermo- and acidophilic red alga Galdieria sulphuraria
The specific activity of both enzymes increased about fourfold when cells were transferred from autotrophic to heterotrophic conditions regardless of whether sugars or polyols were supplied as substrates and the significance of polyol metabolism in Galdieria sulphuraria with regard to the natural habitat of the alga is discussed.
Ketose reductase activity in developing maize endosperm.
It is postulated that ketose reductase may function to metabolize some of the fructose produced during sucrose degradation in maize endosperm, but the metabolic fate of sorbitol produced by this reaction is not known.
Properties of Sorbitol Dehydrogenase in Strawberry Fruit and Enhancement of the Activity by Fructose and Auxin
The kinetics and induction profiles by phytohormones of NAD-SDH showed that sorbitol metabolism in strawberry fruit was different from that in apple and Japanese pear fruits.
Crystallization and Properties of NAD-Dependent D-Sorbitol Dehydrogenase from Gluconobacter suboxydans IFO 3257.
NAD-dependent D-sorbitol dehydrogenase (EC was crystallized from the cytosolic fraction of Gluconobacter suboxydans IFO 3257. This is the first example of the enzyme crystallized from
Sorbitol dehydrogenase is a cytosolic protein required for sorbitol metabolism in Arabidopsis thaliana.
Changes in the Amounts of the NAD-dependent Sorbitol Dehydrogenase and Its Involvement in the Development of Apple Fruit
Seasonal changes in the amounts of the NAD-dependent sorbitol dehydrogenase (NAD-SDH) protein in developing apple fruit were determined by immunoblotting analysis and suggested that there could be posttranslational modification to the pre-existing enzyme or isoenzyme of NAD- SDH.
The role of SORBITOL DEHYDROGENASE in Arabidopsis thaliana.
A role for SDH in metabolism of sorbitol to fructose and in ribitol conversion to ribulose in A. thaliana during recovery from drought stress is indicated, with effects not observed with other polyols or with ribitol-treated WT plants.
Gene expression of NAD+-dependent sorbitol dehydrogenase and NADP+-dependent sorbitol-6-phosphate dehydrogenase during development of loquat (Eriobotrya japonica Lindl.) fruit.
The trend of S6PDH activity during fruit development paralleled that of NAD- SDH activity, revealing that the regulation of the activity is mainly at the transcriptional level like NAD-SDH, however, the role of S 6PDH in fruit is not yet clear.